Jvc Av-28bt7exx
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AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
SERVICE MANUAL COLOUR TELEVISION
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
CONTENTS ★ ★ 1
SPECIFICATIONS ･････････････････････････････････････････････････････････････ ････････････････････････････････ ･････････････････････････････ 2 ･･･････････････････････････････････････････････････････ 4 SAFETY PRECAUTIONS ･･･････････････････････････････････････････････････････ ････････････････････････････････････････････････････････････････ FEATURES････････････････････････････････ ････････････････････････････････ ･･･････････････････････････････････ ････････････････････････････････ ･･･ 5 MAIN DIFFERENCE LIST ･･･････････････････････････････････････････････････････ ････････････････････････････････ ･･･････････････････････ 5 SPECIFIC SERVICE INSTRUCTIONS ･････････････････････････････････････････････ ････････････････････････････････ ･････････････ 6 SERVICE ADJUSTMENTS ･･････････････････････････････････････････････････････ ････････････････････････････････ ･･････････････････････ 9 PARTS LIST ････････････････････････････････････････････････････････････････ ････････････････････････････････ ･････････････････････････････････ ････････････････････････････････ ･ 17 OPERATING INSTRUCTIONS ････････････････････････････････････････････････ STANDARD CIRCUIT DIAGRAM ････････････････････････････････ ････････････････ 2-1 COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
No.51883 Jan. 2002
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
SPECIFICATIONS Content ITEM
AV28BT7ENS (Silver) AV28BT7ENB (Black)
AV28BT7EES (Silver) AV28BT7EEB (Black)
Dimensions (WxHxD)
77 x 58 x 48 cm
Weight
33.2 kg
TV RF System
B/G
B/G, D/K, K1
TV Mode
PAL
PAL / SECAM
Video Mode
PAL / NTSC 3.58 / NTSC 4.43
PAL / SECAM / NTSC 3.58 / NTSC 4.43
Colour System Teletext System
Fastext / Toptext
Stereo System
A2 / German + NICAM
Tuning System
Frequency Synthesizer Tuning System
Number Of CH memory position
Receiving Frequency
Intermediate Frequency
100 ch
VHF (VL)
46.25MHZ ~ 168.25MHz
VHF (VH)
175.25MHz ~ 463.25MHz
UHF
471.25MHz ~ 863.25MHz
CATV
Super (S11-S20) & Hyper (S21-S41) bands receivable
VIF Carrier
38.9MHz 32.4MHz (6.5MHz)
SIF Carrier
32.9MHz (6.0MHz) 33.4MHz (5.5MHz)
Colour Sub Carrier Frequency
PAL (4.43MHz), SECAM (4.43MHz), NTSC (3.58MHz/4.43MHz)
Aerial Input Terminal
75Ohm Unbalanced
Power Input
AC 220 ~ 240V, 50Hz
Power Consumption
120W(Max.)/103W(Avg.)
Picture Tube
28 inch measured diagonally
High Voltage
28kV (in cut-off service mode)
Speaker
57 ×160 mm ellipse type ×2
Audio Output
8W + 8W
Input
Output
Input Terminal
Output Terminal Remote Control Unit
Video
1Vp-p, 75 Ohm
S/Video
Y: 1Vp-p Positive C: 0.286Vp-p
Audio (L/R)
500 mVrms, High Impedance
Video
1 Vp-p, 75 Ohm
Audio (L/R) Rear Side
500 mVrms, Low Impedance AV1 (Video/Audio/RGB) AV2 (Video/Audio/S-VHS)
Front Side
AV3 (Video/Audio)
Front Side
Headphone jack (Stereo mini jack 3.5)
Rear Side
AV1 (Video/Audio) AV2 (Video/Audio) (Selected TV, AV1 or AV3) RM-C85, Battery size:AAA/R03 x 2
Design & specifications are subject to change without notice.
2
No.51883
AV28BT7EPS (Silver) AV28BT7EPB (Black)
B/G, L/L’
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
■ 21-pin Euro connector (SCART socket) : AV-1 / AV-2 (P-P= Peak to Peak, S-W= Sync tip to white peak, B-W= Blanking to white peak) Pin No.
Signal Designation
Matching Value
AV-1
AV-2
1
AUDIO R output
500mVrms(Nominal),Low impedance
○ (TV OUT)
○ (TV/LINE OUT)
2
AUDIO R input
500mVrms(Nominal),High impedance
○
○
3
AUDIO L output
500mVrms(Nominal),Low impedance
○ (TV OUT)
○ (TV/LINE OUT)
4
AUDIO GND
○
○
5
GND (B)
○
○
6
AUDIO L input
500mVrms(Nominal), High impedance
○
○
7
B input
700mVB-W , 75Ω
○
NC
8
FUNCTON SW (SLOW SW)
Low : 0-3V, High : 8-12V, High impedance
○
NC
9
GND (G)
○
○
10
-
NC
-
11
G input
○
NC
-
NC
-
13
GND (R)
○
○
14
GND (YS)
○
NC
15
R / C input
R : 700mVB-W , 75Ω C : 300mVP-P, 75Ω
○ (R/C)
○ (only C)
16
Ys input
Low : 0 – 0.4, High : 1 - 3V, 75Ω
○
NC
17
GND(VIDEO output)
○
○
18
GND(VIDEO input)
○
○ ○ (TV/LINE OUT)
12
700mVB-W , 75Ω
19
VIDEO output
1VS-W (Negative going sync), 75Ω
○ (TV)
20
VIDEO / Y input
1VS-W (Negative going sync), 75Ω
○
○
21
COMMON GND
○
○
[Pin assignment]
No.51883
3
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
SAFETY PRECAUTIONS 1. The design of this product contains special hardware, many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Service should be performed by qualified personnel only. 2. Alterations of the design or circuitry of the products should not be made. Any design alterations or additions will void the manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom. 3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the parts list of Service manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the parts list in Service manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement part shown in the parts list of Service manual may cause shock, fire, or other hazards. 4. Don't short between the LIVE side ground and ISOLATED (NEUTRAL) side ground or EARTH side ground when repairing. Some model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE side GND, the ISOLATED(NEUTRAL) side GND and EARTH side GND. Don't short between the LIVE side GND and ISOLATED(NEUTRAL) side GND or EARTH side GND and never measure with a measuring apparatus (oscilloscope etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND or EARTH side GND at the same time. If above note will not be kept, a fuse or any parts will be broken. 5. If any repair has been made to the chassis, it is recommended that the B1 setting should be checked or adjusted (See ADJUSTMENT OF B1 POWER SUPPLY).
9. Isolation Check (Safety for Electrical Shock Hazard) After re-assembling the product, always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/audio input and output terminals, Control knobs, metal cabinet, screwheads, earphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. (1) Dielectric Strength Test The isolation between the AC primary circuit and all metal parts exposed to the user, particularly any exposed metal part having a return path to the chassis should withstand a voltage of 3000V AC (r.m.s.) for a period of one second. (. . . . Withstand a voltage of 1100V AC (r.m.s.) to an appliance rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V or more, for a period of one second.) This method of test requires a test equipment not generally found in the service trade. (2) Leakage Current Check Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Using a "Leakage Current Tester", measure the leakage current from each exposed metal part of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground (water pipe, etc.). Any leakage current must not exceed 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.2mA AC (r.m.s.). z Alternate Check Method Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Use an AC voltmeter having 1000 ohms per volt or more sensitivity in the following manner. Connect a 1500: 10W resistor paralleled by a 0.15PF AC-type capacitor between an exposed metal part and a known good earth ground (water pipe, etc.). Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Any voltage measured must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.3V AC (r.m.s.). This corresponds to 0.2mA AC (r.m.s.).
6. The high voltage applied to the picture tube must conform with that specified in Service manual. Excessive high voltage can cause an increase in X-Ray emission, arcing and possible component damage, therefore operation under excessive high voltage conditions should be kept to a minimum, or should be prevented. If severe arcing occurs, remove the AC power immediately and determine the cause by visual inspection (incorrect installation, cracked or melted high voltage harness, poor soldering, etc.). To maintain the proper minimum level of soft X-Ray emission, components in the high voltage circuitry including the picture tube must be the exact replacements or alternatives approved by the manufacturer of the complete product. 7. Do not check high voltage by drawing an arc. Use a high voltage meter or a high voltage probe with a VTVM. Discharge the picture tube before attempting meter connection, by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10k: 2W resistor to the anode button. 8. When service is required, observe the original lead dress. Extra precaution should be given to assure correct lead dress in the high voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of overheating should be replaced. Always use the manufacturer's replacement components.
4
No.51883
AC VOLTMETER (HAVING 1000 :/V, OR MORE SENSITIVITY)
0.15μF AC-TYPE
1500 : 10W GOOD EARTH GROUND
PLACE THIS PROBE ON EACH EXPOSED METAL PART
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
FEATURES 1. It is a remte controlled color television. 2. 100 programs from VHF, UHF bands or cable channels can be preset. 3. It can tune cable channels. 4. Controlling the TV is very easy by its menu driven system. 5. It has two Euroconnector sockets for external device (such as video recorder, video games, audio set, etc.) 6. Front AV Input available. 7. Stereo sound systems (German + Nicam) are available. 8. Full function Teletext (Fastext, Toptext).
9. 10. 11. 12. 13. 14. 15.
It is possible to connect headphone. Direct channel access. APS (Automatic Programming System). All programs can be named. Forward or backward automatic tuning. Automatic sound mute when no transmission. 5 minutes after the broadcasting (closedown), the TV switches itself automatically to stand-by mode.
MAIN DIFFERENCE LIST MODEL No. Parts Name
AV28BT7ENS (Silver)
AV28BT7ENB (Black)
AV28BT7EES (Silver)
AV28BT7EEB (Black)
AV28BT7EPB (Black)
MAIN PWB
VE-20073586
F CARTON BOX
VE-20083462
VE-20083400
VE-20083464
VE-20083469
VE-20083471
VE-20083484
INST BOOK
VE-20083463
VE-20083402
VE-20083466
VE-20083468
VE-20083470
VE-20083483
RATING LABEL
VE-20083403
VE-20083401
VE-20083465
VE-20083467
VE-20083482
VE-20083485
FRONT CABINET
VE-20082289
VE-20081489
VE-20082289
VE-20081489
VE-20082289
VE-20081489
BACK COVER
VE-20082322
VE-20069017
VE-20082322
VE-20069017
VE-20082322
VE-20069017
TV RF system
B/G
B/G, D/K,K1
PAL
PAL / SECAM
TV Colour system
VIDEO
PAL NTSC 3.58 NTSC 4.43
VE-20073447
AV28BT7EPS (Silver) VE-20081473
B/G,L/L’
PAL / SCAM NTSC 3.58 NTSC 4.43
No.51883
5
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
SPECIFIC SERVICE INSTRUCTIONS DISASSEMBLY PROCEDURE REMOVING THE REAR COVER 1. Remove the 8 screws marked A. 2. Withdraw the rear cover toward you.
REMOVING THE FRONT AV + HEADPHONE JACK BOARD ASS’Y z After removing the rear cover. 1. Remove the 2 screws marked B, and remove the FRONT AV + HEADPHONE JACK BOARD ASS’Y.
REMOVING THE FRONT CONTROL PWB z After removing the rear cover. 1. Remove the MAIN PWB ASS’Y. 2. Remove the 5 screws marked C, and remove the FRONT CONTROL PWB.
REMOVING THE SPEAKER z After removing the rear cover. 1. Remove the 4 screws marked D, and remove the SPEAKER. 2. Remove an opposite side similarly.
REMOVING THE MAIN PWB z After removing the rear cover. 1. Draw out back and remove the MAIN PWB ASS’Y, CAUTIONS) Be careful enough when developing a main chassis. The wire of a POWER TRANSFER does not separate and short-circuit with other parts.
6
No.51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
A
(×8) REAR COVER
FRONT CABINET
SPEAKER
D
(×4)
B
MAIN PWB
(×2)
C
(×5)
D (×4) SPEAKER
FRONT CONTROL PWB FRONT AV + HEADPHONE JACK PWB
No.51883
7
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
SETTING OF THE LAST MEMORY FOR SHIPMENT ■ USER SETTING VALUES Setting Item
Setting Value
Setting Item
SOUND MENU
Setting Value FEATURE MENU
BASS
CENTER
SLEEP TIMER
OFF
TREBLE
↑
CHILD LOCK
OFF
BALANCE
↑
EFFECT
OFF PICTURE MENU
BRIGHTNESS COLOUR CONTRAST SHARPNESS HUE (only NTSC) PICTURE MODE
INSTALL-> TV CONFIG. MENU
These adjust are automatically restored when APS bit in Service menu is set.
LANGUAGE
ENGLISH
COUNTRY
?
AV-2 OUTPUT
TV
The procedure for setting APS bit is described bellow. AUTO
■ SETTING APS BIT IN SERVICE MENU 1) 2) 3) 4) 5)
Enter service menu in TV mode by pressing “INFO” and “MUTING” keys simultaneously. Service Menu will appear. Select OPTIONS by pressing Up/Down keys on remote control unit. Enter OPTIONS by pressing Left/Right keys on remote control unit. Select OPTION 8 by pressing Up/Down keys on remote control unit. Selected bit in one OPTION is shown by blinking character. Select B2 by pressing Left/Right keys on remote control unit. DO NOT CHANGE ANY OTHER BIT. 6) Press digit key “1” to set APS bit. 7) Press “STANDARD” key on remote control unit to exit service mode.
8
No.51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
SERVICE ADJUSTMENTS ADJUSTMENT PREPARATION 1. You can make the necessary adjustments for this unit with either the Remote Control Unit or With the adjustment tools and parts as given below. 2. Adjustment with the Remote Control Unit is made on the basis of the initial setting values, however, the new setting values which set the screen to its optimum condition may differ from the initial settings. 3. Make sure that AC power is turned on correctly. 4. Turn on the power for set and test equipment before use, and start the adjustment procedures after waiting at least 30 minutes. 5. Unless otherwise specified, prepare the most suitable reception or input signal for adjustment.
6. Never touch any adjustment parts which are not specified in the list for this adjustment - variable resistors, transformers, condensers, etc. 7. Presetting before adjustment. Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit: VIDEO STATUS
STANDARD
TINT/COLOR PICTURE/BRIGHT
CENTER
DETAIL
ADJUSTMENT EQUIPMENT 1. DC voltmeter (or digital voltmeter) 2. Signal generator (Pattern generator)［PAL/SECAM/NTSC］ 3. Remote control unit
MAIN PARTS LOCATIONS HEADPHONE JACK FRONT
TOP VIDEO R
L
AUDIO.
LED REMOCON RECEIVER
MENU （＋） （－） PROG /Ch.
（＋） （－） VOL
FRONT
IC502 MEMORY IC
IC501 MICOM
FBT
MULTI SOUND PWB
TUNER
SCART jack
SCART jack
AV-1
AV-2
B1 (Indicated [150/115V] on the bottom side)
No. 51883
UPPER : FOCUS VR LOWER : SCREEN VR
9
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
BASIC OPERATION SERVICE MENU ■ HOW TO ENTER THE SERVICE MODE 1)
Press the INFORMATION key and MUTING key of REMOTE CONTROL UNIT simultaneously.
SERVICE ADJUST…..
■ SELECTION OF ADJUSTMENT ITEMS 1) 2) 3) 4)
OPTIONS…..
Press the UP ( ) or DOWN ( ) key and select the service menu item. Press the RIGHT ( ) or LEFT ( ) key and enter ADJUSTMENT SCREEN. Select the ADJUST No., use RIGHT ( ) / LEFT ( ) key of remote control unit. To change the selected parameter, use RIGHT ( ) and LEFT ( ) key.
SERVICE MENU ITEM
SERVICE MENU SCREEN
ADJUST No. ADJUST
PARAMETER VALUE
***
******
PARAMETER
*** OUT
UP
■ HOW TO EXIT SERVICE MODE ADJUSTMENT SCREEN
1) Press the STANDARD Key on REMOTE CONTROL UNIT.
■ ADJUSTMENT SERVICE MENU ADJUSTMENT ITEM
REMOTE CONTROL UNIT key NAME
DISCRIPTION
00
White Point RED
01
White Point GREEN
02
White Point BLUE
AGC
03
AGC
IF-PLL NEGATIVE
04
IF-PLL Negative
IF-PLL POSITIVE
05
IF-PLL Positive
06
Y-Delay PAL
07
Y-Delay SECAM
08
Y-Delay NTSC
10
4 : 3 PICTURE MODE
21
16 : 9 PICTURE MODE
11
4 : 3 PICTURE MODE
22
16 : 9 PICTURE MODE
12
4 : 3 PICTURE MODE
23
16 : 9 PICTURE MODE
13
4 : 3 PICTURE MODE
24
16 : 9 PICTURE MODE
14
4 : 3 PICTURE MODE
25
16 : 9 PICTURE MODE
15
4 : 3 PICTURE MODE
26
16 : 9 PICTURE MODE
16
4 : 3 PICTURE MODE
27
16 : 9 PICTURE MODE
17
4 : 3 PICTURE MODE
28
16 : 9 PICTURE MODE
18
4 : 3 PICTURE MODE
29
16 : 9 PICTURE MODE
19
4 : 3 PICTURE MODE
30
16 : 9 PICTURE MODE
20
4 : 3 PICTURE MODE
31
16 : 9 PICTURE MODE
WHITE BALANCE
LUMINANCE DELAY
VERTICAL ZOOM
VERTICAL SCROLL
4 : 3 HORIZONTAL SHIFT
VERTICAL SLOPE
VERTICAL AMPLITUDE
S-CORRECTION
VERTICAL SHIFT
EW WIDTH
EW PARABOLA WIDTH
EW CORNER PARABOLA
EW TRAPEZIUM
10
ADJUST No.
MUTING key
No. 51883
STANDARD key UP / DOWN ( / ) key
INFORMATION key
RIGHT / LEFT ( / ) key
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
ADJUSTMENTS Item SCREEN VOLTAGE Adjustment
Measuring instrument
Test point
Adjustment part SCREEN VR
Signal Generator
[FBT]
Remote Control unit
OPTION 02
SERVICE MENU
Description 1. Receive a PAL colour bar. 2. Enter the option settings in the SERVICE MENU. 3. Press the UP / DOWN ( ▲/ ▼) key, and Enter Option 02. 4. To change bit 6, come on to it by using L / R ( / ) key and make it “1” by pressing “1” white bit 2 is blinking. 5. Observe the thin horizontal blue-white line in the middle of the screen, and adjust the lower VR of the FBT, until the line is in its thinnest visible thickness. 6. Then make Option 02 bit 6 “0” , by pressing “0” on the remote control unit, although you do not see any picture.
SERVICE ADJUST….. OPTIONS…..
SELECT OPTION menu
FBT
FOCOUS
SCREEN
FOCUS Adjustment
Signal generator
B1 VOLTAGE check
DC Voltmeter
FOCUS VR [FBT]
Marked
1. Receive a PAL circle pattern. 2. Adjust the upper VR of the FBT, until you get the Optinum focus, the sharpest picture.
1.
[150/115V] on the MAIN PWB
No. 51883
Check whether the voltage at the point named and silk screened as “150 / 115V” on the MAIN PWB is 150V DC.
11
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
Item WHITE BALANCE
Measuring instruments Signal generator
Test point
Adjustment part ADJUST 00 (White point - RED) ADJUST 01 (White point - GREEN)
Description [LOW LIGHT] 1. Receive a whole black signal. 2. Adjust the, , , in the SERVICE MENU so that the entire screen do not shine black.
ADJUST 02 (White point - BLUE)
[HIGH LIGHT]
ADJUST 03
1. 2. 3.
Receive a any broadcast. Select from SERVICE MENU Connect a DC voltmeter to pin 1 of the tuner. Change the AGC parameter until you see 3.70V DC on voltmeter display.
IF-PLL NEGATIVE Adjustment
ADJUST 04
1. 2.
Select from SERVICE MENU. Adjustment value is set to 80 as a default value.
IF-PLL POSITIVE Adjustment
ADJUST 05
1. 2.
Select from SERVICE MENU. Adjustment value is set to 80 as a default value.
AGC Adjustment
12
DC voltmeter
1. Receive a white and black signal (colour off). 2. Adjust the, , , in the SERVICE MENU so that the whiteness in the screen become sharp.
No. 51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
Item LUMINANCE DELAY Adjustment
Measuring instruments Signal generator
Test point
Adjustment part Adjust 06
Description [ Y-Delay PAL ] 1. Receive a PAL colour bar signal. 2. Select from SERVICE MENU. 3. Adjust Y-Delay PAL till the colour transients on the colour bar of the pattern become as sharper and colours between transients do not mix with each other as possible. Note: If the SAW filter is one of the G1965M, J1951M, K2958M, K2962M, G3957M, K6256K, K6259K or M1963M, there is constant group delay distortion, so for an equal delay of the luminance and chrominance signal the delay must be set at a value of 160nS. This means the adjustment must be set to the maximum value.
Adjust 07
[ Y-Delay SECAM ] 1. Receive a SECAM colour bar signal. 2. Select from SERVICE MENU. 3. Adjust Y-Delay SECAM till the colour transients on the colour bar of the pattern become as sharper and colours between transients do not mix with each other as possible. Note: If the SAW filter is one of the G1965M, K2958M, K2962M, G3957M, K6256K or K6259K, there is constant group delay distortion, so for an equal delay of the luminance and chrominance signal the delay must be set at a value of 160nS. This means the adjustment must be set to the maximum value.
Adjust 08
[ Y-Delay NTSC ] 1. Receive a NTSC colour bar signal. 2. Select from SERVICE MENU. 3. Adjust Y-Delay NTSC till the colour transients on the colour bar of the pattern become as sharper and colours between transients do not mix with each other as possible. Note: If the SAW filter is M1963M, there is constant group delay distortion, so for an equal delay of the luminance and chrominance signal the delay must be set at a value of 160nS. This means the adjustment must be set to the maximum value.
No. 51883
13
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
Item
Measuring instruments
VERTICAL ZOOM Adjustment
Signal generator
VERTICAL SCROLL Adjustment
Signal generator
4:3 HORIZONTAL SHIFT Adjustment
Signal generator
VERTICAL SLOPE Adjustment
Signal generator
VERTICAL AMPLITUDE Adjustment
Signal generator
14
Test point
Adjustment part Adjust 10 ( 4 : 3 ) Adjust 21 ( 16 : 9 )
Adjust 11 ( 4 : 3 ) Adjust 22 ( 16 : 9 )
Adjust 12 ( 4 : 3 ) Adjust 23 ( 16 : 9 )
Adjust 13 ( 4 : 3 ) Adjust 24 ( 16 : 9 )
Adjust 14 ( 4 : 3 ) Adjust 25 ( 16 : 9 )
No. 51883
Description 1. 2. 3. 4.
Receive a PAL circle test pattern. Set < 4 : 3 aspect mode >. Select < ADJUST 10 > from SERVICE MENU. Change vertical zoom till you see the upper and olwer limit of the circle as close to the upper and lower limit of the picture tube as possible. 5. Set < 16 : 9 aspect mode >. 6. Adjusts with the step which is the same above from 3 to 4 about the 16 : 9 aspect mode, too.
1. 2. 3. 4.
Receive a PAL circle test pattern. Set < 4 : 3 aspect mode >. Select < ADJUST 11 > from SERVICE MENU. Change vertical scroll till you see the circle exactly un the middle of the screen. 5. Set < 16 : 9 aspect mode >. 6. Adjusts with the step which is the same above from 3 to 4 about the 16 : 9 aspect mode, too. 1. 2. 3. 4.
Receive a RED PURITY test pattern. Set < 4 : 3 aspect mode >. Select < ADJUST 12 > from SERVICE MENU. Change horizontal shift till the picture is horizontally centered. Check whether this adjustment is correct after completing Service Mode Adjustment. 5. Set < 16 : 9 aspect mode >. 6. Adjusts with the step which is the same above from 3 to 4 about the 16 : 9 aspect mode, too.
1. 2. 3. 4.
Receive a CROSS-HATCH signal. Set < 4 : 3 aspect mode >. Select < ADJUST 13 > from SERVICE MENU. Change vertical slope till the size of squares on both the upper and lower part of test pattern become equal to the squares laying on the vertical centre of the test pattern. 5. Check and readjust VERTICAL SLOPE item if the adjustment becomes improper after some other geometric adjustments are done. 6. Set < 16 : 9 aspect mode >. 7. Adjusts with the step which is the same above from 3 to 5 about the 16 : 9 aspect mode, too.
1. 2. 3. 4.
Receive a PAL test pattern signal. Set < 4 : 3 aspect mode >. Select < ADJUST 14 > from SERVICE MENU. Change vertical slope till horizontal black lines on both the upper and lower part of the test pattern become very close to the upper and lower horizontal sides of picture tube and nearly about to disappear. 5. Check and readjust VERTICAL AMPLITUDE item if the adjustment becomes improper after some other geometric adjustments are done. 6. Set < 16 : 9 aspect mode >. 7. Adjusts with the step which is the same above from 3 to 5 about the 16 : 9 aspect mode, too.
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
Item
Measuring instrument
S-CORRECTION Signal Adjustment generator
Test point
Adjustment part Adjust 15 ( 4 : 3 ) Adjust 26 ( 16 : 9 )
VERTICAL SHIFT Adjustment
Signal generator
EW WIDTH Adjustment
Signal generator
Adjust 16 ( 4 : 3 ) Adjust 27 ( 16 : 9 )
Adjust 17 ( 4 : 3 ) Adjust 28 ( 16 : 9 )
EW PARABOLA WIDTH
Signal generator
Adjustment
EW CORNER Signal PARABOLA generator Adjustment
Adjust 18 ( 4 : 3 ) Adjust 29 ( 16 : 9 )
Adjust 19 ( 4 : 3 ) Adjust 30 ( 16 : 9 )
Description 1. 2. 3. 4.
Receive a PAL circle pattern signal. Set < 4 : 3 aspect mode >. Select < ADJUST 15 > from SERVICE MENU. Change S-correction till the middle part of the circle is round as possible. 5. Set < 16 : 9 aspect mode >. 6. Adjusts with the step which is the same above from 3 to 4 about the 16 : 9 aspect mode, too. 1. Receive a PAL test pattern signal ( or the symmetrical signal in the top and the bottom and on either side to find ). 2. Set < 4 : 3 aspect mode >. 3. Select < ADJUST 16 > from SERVICE MENU. 4. Change Vertical Shift till the test pattern is vertically centred, i.e. horizontal line at the centre pattern is in equal distance both to upper and lower side of the picture tube. 5. Check and readjust Vertical Shift item if the adjustment becomes improper after some other geometric adjustments are done. 6. Set < 16 : 9 aspect mode >. 7. Adjusts with the step which is the same above from 3 to 5 about the 16 : 9 aspect mode, too. 1. 2. 3. 4.
Receive a PAL test pattern signal. Set < 4 : 3 aspect mode >. Select < ADJUST 17 > from SERVICE MENU. Change EW Width till the vertical black and white bars on both left and right side of the pattern exactly disappear. 5. Set < 16 : 9 aspect mode >. 6. Adjusts with the step which is the same above from 3 to 4 about the 16 : 9 aspect mode, too. 1. 2. 3. 4.
Receive a PAL test pattern signal. Set < 4 : 3 aspect mode >. Select < ADJUST 18 > from SERVICE MENU. Change EW Parabola Width till vertical lines close to the both sides of the picture frame become parallel to vertical side of picture tube. 5. Check and readjust EW Parabola Width item if the adjustment becomes improper after some other geometric adjustments are done. 6. Set < 16 : 9 aspect mode >. 7. Adjusts with the step which is the same above from 3 to 5 about the 16 : 9 aspect mode, too. 1. 2. 3. 4.
Receive a PAL test pattern signal. Set < 4 : 3 aspect mode >. Select < ADJUST 19 > from SERVICE MENU. Change EW Corner Parabola till vertical lines at the corners of both sides of picture frame become vertical and parallel to vertical corner sides of picture tube. 5. Check and readjust EW Corner Parabola item if the adjustment becomes improper after some other geometric adjustments are done. 6. Set < 16 : 9 aspect mode >. 7. Adjusts with the step which is the same above from 3 to 5 about the 16 : 9 aspect mode, too.
No. 51883
15
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
Item EW TRAPEZIUM Adjustment
16
Measuring instrument Signal generator
Test point
Adjustment part Adjust 20 ( 4 : 3 ) Adjust 31 ( 16 : 9 )
Description 1. 2. 3. 4.
Receive a PAL circle pattern signal. Set < 4 : 3 aspect mode >. Select < ADJUST 20 > from SERVICE MENU. Change EW Trapezium till vertical lines, especially lines at the sides of the picture frame became parallel to the both sides of picture tube as possible. 5. Check and readjust EW Trapezium item if the adjustment becomes improper after some other geometric adjustment. 6. Set < 16 : 9 aspect mode >. 7. Adjusts with the step which is the same above from 3 to 5 about the 16 : 9 aspect mode, too.
No. 51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
PARTS LIST CONTENTS USING PW BOARD & REMOTE CONTROL UNIT ･･････････････････････････････････････････････････････ 17 EXPLODED VIEW PARTS LIST ･･････････････････････････････････････････････････････････････････････････ 18 EXPLODED VIEW ････････････････････････････････････････････････････････････････････････････････････････ 19 PRINTED WIRING BOARD PARTS LIST
[ AV28BT7ENS / AV28BT7ENB] z
MAIN PW BOARD ASS'Y ･･････････････････････････････････････････････････････････････････････････････････････ 20
z
MULTI SOUND PW BOARD ASS’Y ･････････････････････････････････････････････････････････････････････････････ 25
z
CRT SOCKET PW BOARD ASS'Y ･･････････････････････････････････････････････････････････････････････････････ 26
z
FRONT CONTROL PW BOARD ASS’Y ･･････････････････････････････････････････････････････････････････････････ 26
z
FRONT AV + HEADPHONE JACK PW BOARD ASS’Y･････････････････････････････････････････････････････････････ 26
z
PROTECTION MODULE PW BOARD ASS’Y ･････････････････････････････････････････････････････････････････････ 26
z
T(SPOT KILLER) MODULE PW BOARD ASS’Y･･･････････････････････････････････････････････････････････････････ 26
[ AV28BT7EES / AV28BT7EEB] z
MAIN PW BOARD ASS'Y ･･････････････････････････････････････････････････････････････････････････････････････ 27
[ AV28BT7EPS / AV28BT7EPB] z
MAIN PW BOARD ASS'Y ･･････････････････････････････････････････････････････････････････････････････････････ 32
z
MULTI SOUND PW BOARD ASS’Y ･････････････････････････････････････････････････････････････････････････････ 37
PACKING / PACKING PARTS LIST
･･････････････････････････････････････････････････････････････････････ 39
USING PW BOARD & REMOTE CONTROL UNIT PWB ASS'Y
AV28BT7ENS AV28BT7ENB
AV28BT7EES AV28BT7EEB
AV28BT7EPS AV28BT7EPB
MAIN PWB
VE-20073586
VE-20073447
VE-20071473
MULTI SOUND PWB
VE-20078991
CRT SOCKET PWB
VE-20074437
FRONT CONTROL PWB
VE-20001612
FRONT AV + HEADPHONE JACK PWB
VE-20083646
PROTECTION MODULE PWB
VE-20058569
T(SPOT KILLER) MODELE PWB
VE-20019598
Model
REMOTE CONTROL UNIT
VE-20079020
RM-C85
No. 51883
17
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
EXPLODED VIEW PARTS LIST [ SILVER model : AV28BT7ENS, AV28BT7EES, AV28BT7EPS]
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18
No. 51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
EXPLODED VIEW
17
16
13
12
V01
11
FRONT AV + HEADPHONE JACK PWB
FRONT CONTROL PWB MAIN PWB
15
5
8 7 6
13
12
11
14
3
4 10
9
2
No. 51883
1
19
AV28BT7ENS / AV28BT7ENB
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20
No. 51883
AV28BT7ENS / AV28BT7ENB
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No. 51883
AV28BT7EES / AV28BT7EEB
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27
AV28BT7EES / AV28BT7EEB
[ AV28BT7EES / AV28BT7EEB ] 3DUW1DPH 'HVFULSWLRQ 6\PERO1R 3DUW1R 5(6,6725
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No. 51881
AV28BT7EES / AV28BT7EEB
[ AV28BT7EES / AV28BT7EEB ] 3DUW1DPH 'HVFULSWLRQ 6\PERO1R 3DUW1R &$3$&,725
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No. 51881
29
AV28BT7EES / AV28BT7EEB
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No. 51881
AV28BT7EES / AV28BT7EEB
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31
AV28BT7EPS / AV28BT7EPB
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No. 51883
AV28BT7EPS / AV28BT7EPB
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33
AV28BT7EPS / AV28BT7EPB
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No. 51883
AV28BT7EPS / AV28BT7EPB
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35
AV28BT7EPS / AV28BT7EPB
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No. 51883
AV28BT7EPS / AV28BT7EPB
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No. 51883
37
AV28BT7EPS / AV28BT7EPB
[ AV28BT7EPS / AV28BT7EPB ]
CRT SOCKET P.W. BOARD ASS’Y (VE-20074437) Refer to PARTS LIST in page 25 for this P.W. board.
FRONT CONTROL P.W. BOARD ASS’Y (VE-20001612) Refer to PARTS LIST in page 25 for this P.W. board.
FRONT AV + HEADPHONE JACK P.W. BOARD ASS’Y (VE-20083646) Refer to PARTS LIST in page 25 for this P.W. board.
PROTECTION MODULE P.W. BOARD ASS’Y (VE-20058569) Refer to PARTS LIST in page 25 for this P.W. board.
T(SPOT KILLER) MODULE P.W. BOARD ASS’Y (VE-20019598) Refer to PARTS LIST in page 25 for this P.W. board.
38
No. 51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
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No. 51883
39
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
WAVEFORM DIAGRAMS MAIN PWB Q802
D
8Vp-p(H)
IC401
6pin
1.7Vp-p(H)
IC050
6pin
0.7Vp-p(H)
IC050
17pin
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
1.4Vp-p(H)
STANDARD CIRCUIT DIAGRAM NOTE ON USING CIRCUIT DIAGRAMS 1.SAFETY The components identified by the symbol and shading are critical for safety. For continued safety replace safety critical components only with manufactures recommended parts.
IC401
17pin
0.7Vp-p(H)
IC401
30pin
0.8Vp-p(H)
IC401
29pin
0.9Vp-p(H)
IC401
19pin
2.SPECIFIED VOLTAGE AND WAVEFORM VALUES The voltage and waveform values have been measured under the following conditions.
2Vp-p(H)
(1)Input signal
: Colour bar signal
(2)Setting positions of each knob/button and variable resistor
IC401
20pin
2Vp-p(H)
IC401
21pin
2Vp-p(H)
IC401
40pin
1Vp-p(H)
Q605
: Original setting position when shipped
(3)Internal resistance of tester
:DC 20k
(4)Oscilloscope sweeping time
:H
20µS/div
:V
5mS/div
C
450Vp-p(H)
/V
:Others (5)Voltage values
(1)Resistors Resistance value No unit
0.6Vp-p(V)
IC701
1pin
4.8Vp-p(V)
IC701
9pin
0.5Vp-p(V)
IC501 1.2Vp-p
34pin
K M
:[ ] :[K ] :[M
]
Type No indication
:Carbon resistor
OMR
:Oxide metal film resistor
MFR
:Metal film resistor
MPR
:Metal plate resistor
UNFR
:Uninflammable resistor
FR
:Fusible resistor
Composition resistor 1/2 [W] is specified as 1/2S or Comp. (2)Capacitors Capacitance value
CRT SOCKET PWB IC901 35Vp-p(H)
2-4
7pin
IC901 35Vp-p(H)
8pin
IC901
9pin
1 or higher less than 1
:DC withstand voltage [V]
AC indicated :AC withstand voltage [V] Electrolytic Capacitors 47/50[Example]:Capacitance value [µF]/withstand voltage[V] Type No indication MM PP MPP MF TF BP TAN
:Ceramic capacitor :Metalized mylar capacitor :Polypropylene capacitor :Metalized polypropylene capacitor :Metalized film capacitor :Thin film capacitor :Bipolar electrolytic capacitor :Tantalum capacitor
(3)Coils No unit
:[ µ H]
Others
:As specified
:All DC voltage values
3.INDICATIONS ON THE CIRCUIT DIAGRAM
47pin
:DC50[V]
Others
Sweeping time is specified
Since the voltage values of signal circuit vary to some extent according to adjustments, use them as reference values.
IC401
Withstand voltage No indication
:[pF]
4.NOTE FOR REPAIRING SERVICE This model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE side GND and the ISOLATED(NEUTRAL) side GND.Therefore, care must be taken for the following points. (1)Do not touch the LIVE side GND or the LIVE side GND and the ISOLATED(NEUTRAL) side GND simultaneously. If the above caution is not respected, an electric shock may be caused. Therefore, make sure that the power cord is surely removed from the receptacle when, for example, the chassis is pulled out. (2)Do not short between the LIVE side GND and ISOLATED(NEUTRAL) side GND or never measure with a measuring apparatus measure with a measuring apparatus ( oscilloscope, etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND at the same time. If the above precaution is not respected , a fuse or any parts will be broken. Since the circuit diagram is a standard one, the circuit and circuit constants may be subject to change for improvement without any notice. NOTE Due improvement in performance, some part numbers show in the circuit diagram may not agree with those indicated in the part list. When ordering parts, please use the numbers that appear in the Parts List.
:[µF]
35Vp-p(H)
No.51883
Jan. 2002 No. 51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
C
E C B
B C E (G)(D)(S)
E C B
E C B
B
E C B
E
FBT SCART1
TOP VIEW CHIP TR
FRONT VIEW
VIDEO PROCESSOR TDA 884X
BOTTOM VIEW
CTI & COMB FILTER
TRANSISTOR
MSP 34X0D
SEMICONDUCTOR SHAPES
DIGITAL SOUND PROCESSOR
HORIZONTAL OUTPUT
2-15
VERTICAL OUTPUT TDA8351/6
VOLTAGE TABLES
VIDEO SWITCH TEA6415
2-11 2-13 2-13
MAIN PWB PATTERN MULTISOUND, CRT SOCKET & FRONT CONTROL PWB PATTERN FRONT AV + HEADPHONE JACK PWB PATTERN
SVHS
PATTERN DIAGRAMS
SCART2
2-5 2-7 2-9 2-9 2-9
CRT
MAIN PWB CIRCUIT DIAGRAM MULTISOUND PWB CIRCUIT DIAGRAM CRT SOCKET PWB CIRCUIT DIAGRAM FRONT CONTROL PWB CIRCUIT DIAGRAM FRONT AV + HEADPHONE JACK PWB CIRCUIT DIAGRAM
RGB AMP. TDA 6108
2-4
8R 6/12W
2-3
SPEAKERS
2-2
AUDIO OUTPUTS TDA2615/6 TDA2614(MONO)
SEMICONDUCTOR SHAPES BLOCK DIAGRAM WAVEFORM DIAGRAMS CIRCUIT DIAGRAMS
8R 6/12W
BLOCK DIAGRAM
CONTENTS
CHIP IC TOP VIEW 1
N N
N
1
N
N
2-2
No.51883
No.51883
IR.
N
N
PLL TUNER UV1315/6
1
KEYPAD
1
IN E OUT
NVM
IN
SMPS (Mc44604)
N
TV-TEXT CONTROLLER SDA 555X
1
OUT E
115/150VDC +12VDCAud. -12VDCAud. 12VDC 8VDC 5VDC 3.3V st-by 2.5V st-by
TOP VIEW
I2C
FRONT VIEW
SERVICE CONNECTOR
BOTTOM VIEW
FRONTAV
IC
2-3
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
CIRCUIT DIAGRAMS
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
MAIN PWB CIRCUIT DIAGRAM
MAIN PWB VE-20073447(AV28BT7EES/EEB) VE-20073586(AV28BT7ENS/ENB) VE-20071473(AV28BT7EPS/EPB) No.51883
!
2-5
2-6
No.51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
MULTISOUND PWB CIRCUIT DIAGRAM
MULTISOUND PWB VE-20078991(AV28BT7ENS/ENB, AV28BT7EES/EEB) VE-20079020(AV28BT7EPS/EPB) No.51883
"
2-7
2-8
No.51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
CRT SOCKET PWB CIRCUIT DIAGRAM
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
CRT SOCKET PWB VE-20074437
FRONT AV + HEAD PHONE JACK PWB CIRCUIT DIAGRAM
FRONT CONTROL PWB CIRCUIT DIAGRAM
FRONT AV + HEAD PHONE JACK PWB VE-20083646
FRONT CONTROL PWB VE-20001612 No.51883
#
2-9
2-10
No.51883
PATTERN DIAGRAMS MAIN
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
PWB PATTERN
FRONT
No.51883
$
2-11
2-12
No.51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
MULTISOUND PWB PATTERN
CRT SOCKET PWB PATTERN
TOP
TOP
FRONT AV + HEADPHONE JACK
FRONT CONTROL PWB PATTERN (PARTS SIDE)
PWB PATTERN
FRONT
TOP
No.51883
%
2-13
2-14
No.51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
VOLTAGE TABLES MAIN PWB
IF PWB IC701
IC050 PIN NO. 1 2 3 4 5 6 7 8 9 10
VOLTAGE 2.8 4.5 2.9 4.8 2.9 3.2 0 2.9 7.9 4.0
PIN NO. 11 12 13 14 15 16 17 18 19 20
PIN NO. 1 2 3 4 5
VOLTAGE 3.0 0 4.0 2.8 4.0 4.0 4.0 4.0 0 3.7
VOLTAGE 0.3 3.7 0 0 2.5 3.0 4.5 4.5 6.7 0.1 3.7 7.8 4.0 0 3.0 0 3.7 5.4 3.5 3.1 3.4 2.1 3.5 3.5 3.5 0.1 3.0 3.0
PIN NO. 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
VOLTAGE 2.4 2.4 2.4 2.4 0.3 2.5 2.5 4.7 7.8 2.8 5.0 0.1 0.9 3.1 4.0 0 3.0 2.3 2.3 4.6 4.6 2.0 3.8 3.8 4.3 2.3 2.9 3.3
VOLTAGE 12.5 11.5 0
PIN NO. 4 5 6
PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
VOLTAGE 12.4 12.1 0.1 0 0.9 0.1 0.2 0.2
PIN NO. 9 10 11 12 13 14 15 16
VOLTAGE 2.6 12.4 0.1
PIN NO. 6 7 8 9
VOLTAGE 0 12.6 0 0
VOLTAGE 0 0 0 3.3 3.3 3.3 3.3 0 2.4 0 3.3 0.9 2.4 0 0.1 0 0 2.4 0.3 0.1 0 2.1 3.3 3.5 3.1 3.1
PIN NO. 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
VOLTAGE 0 0 0 3.3 3.3 3.3 3.3 0.5 0.5 0 2.4 0.3 0.2 0.3 0 2.4 0 3.3 0 3.3 3.3 3.3 3.3 3.3 3.3 3.3
VOLTAGE 0 0 0 0
PIN NO. 5 6 7 8
VOLTAGE 0.1 0.1 3.3 3.3
Q055 Q100 Q501 Q503 Q512 Q514 Q515 Q516 Q517 Q518 Q601 Q603 Q605 Q701 Q702 Q802 Q805 Q806 Q807
PIN NO. 1 2 3 4
VOLTAGE 0.8 2.6 2.3 0.2 3.0 2.4 2.6 2.4
VOLTAGE 2.1 12.5 3.3
PIN NO. 1 2 3
B(G) 3.0 0 0 2.5 4.8 0 2.4 2.4 2.4 2.4 0.1 3.1 0 0.4 0.6 0.1 0.6 0.6 0
PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
PIN NO. 1 2 3 4
VOLTAGE 2.5 0 0 4.9 0 0 4.9 0 4.5 4.5 2.4 2.4 2.4 0.1 0.1 0.1 0 4.8 0 0 0 0 0 4.9 0.1 0.1 0 0 0 0 0 0
PIN NO. 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
VOLTAGE 3.7 3.7 0 3.7 3.7 6.8 7.8 6.5 0 3.6 3.7 3.7 0 3.7 3.7 0 3.7 3.7 0 3.7 3.7 2.6 3.7 0 4.9 0.1 0.1 0.1 0 2.3 2.3 0
VOLTAGE 2.4 2.4 2.4 0
PIN NO. 5 6 7 8
VOLTAGE 3.2 3.2 4.9 0 0.1 2.4 2.4 2.2 0 2.7 0 2.1 5.0 0
PIN NO. 15 16 17 18 19 20 21 22 23 24 25 26 27 28
VOLTAGE 4.9 2.4 2.4 2.4
IC307 PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Q301 VOLTAGE 12.4 0 7.9
VOLTAGE 0.1 0 4.3 3.0 3.5 3.3 3.3 3.3 3.5 4.5 0 3.4 0.1 0.1
E(D) C(S) B(G) 4.8 4.8 4.1
CRT SOCKET PWB IC901 PIN NO. 1 2 3 4 5
VOLTAGE 9.1 0 5
No.51883
&
C(S) 7.8 12.6 0 3.3 3.4 4.8 3.2 4.8 3.2 4.8 0 0 --0 0 0 0 0 11.5
IC301
IC304
IC807 PIN NO. 1 2 3
E(D) 2.4 0 11.9 3.3 5.4 0 4.8 3.2 4.5 3.2 0 15.2 0 0.1 0 167 0 0 0
Q809 Cathode:11.3V Anode:0V Control terminal:2.4V
IC805
IC804 PIN NO. 1 2 3
VOLTAGE 0 12.7 0 0 -12.6
IC502
IC802 PIN NO. 1 2 3 4 5 6 7 8
VOLTAGE 45.2 7.7 0 7.5
IC501
IC801 PIN NO. 1 2 3
PIN NO. 6 7 8 9
IC100 PIN NO. 1 2 3 4 5
IC401 PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
VOLTAGE 2.3 2.3 15 7.5 0
Note) Although the symbol numbers of the level drive transistor and level output transistor are indicated as Q604 and Q606 on the wiring diagram, the numbers are indicated as Q601 and Q605 on the substrate, respectively. The following table shows the silk-printed symbol numbers on the substrate.
2-15
2-16
No.51883
VOLTAGE 3.2 2.9 3.2 0 6.0
PIN NO. 6 7 8 9
VOLTAGE 0.1 0.1 0.1 0.1
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
VICTOR COMPANY OF JAPAN, LIMITED HOME AV NETWORK BUSINESS UNIT. 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama, Kanagawa-prefecture, 221-8528, Japan
Printed in Japan VP 0201 DP2080
SERVICE MANUAL COLOUR TELEVISION
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
CONTENTS ★ ★ 1
SPECIFICATIONS ･････････････････････････････････････････････････････････････ ････････････････････････････････ ･････････････････････････････ 2 ･･･････････････････････････････････････････････････････ 4 SAFETY PRECAUTIONS ･･･････････････････････････････････････････････････････ ････････････････････････････････････････････････････････････････ FEATURES････････････････････････････････ ････････････････････････････････ ･･･････････････････････････････････ ････････････････････････････････ ･･･ 5 MAIN DIFFERENCE LIST ･･･････････････････････････････････････････････････････ ････････････････････････････････ ･･･････････････････････ 5 SPECIFIC SERVICE INSTRUCTIONS ･････････････････････････････････････････････ ････････････････････････････････ ･････････････ 6 SERVICE ADJUSTMENTS ･･････････････････････････････････････････････････････ ････････････････････････････････ ･･････････････････････ 9 PARTS LIST ････････････････････････････････････････････････････････････････ ････････････････････････････････ ･････････････････････････････････ ････････････････････････････････ ･ 17 OPERATING INSTRUCTIONS ････････････････････････････････････････････････ STANDARD CIRCUIT DIAGRAM ････････････････････････････････ ････････････････ 2-1 COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
No.51883 Jan. 2002
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
SPECIFICATIONS Content ITEM
AV28BT7ENS (Silver) AV28BT7ENB (Black)
AV28BT7EES (Silver) AV28BT7EEB (Black)
Dimensions (WxHxD)
77 x 58 x 48 cm
Weight
33.2 kg
TV RF System
B/G
B/G, D/K, K1
TV Mode
PAL
PAL / SECAM
Video Mode
PAL / NTSC 3.58 / NTSC 4.43
PAL / SECAM / NTSC 3.58 / NTSC 4.43
Colour System Teletext System
Fastext / Toptext
Stereo System
A2 / German + NICAM
Tuning System
Frequency Synthesizer Tuning System
Number Of CH memory position
Receiving Frequency
Intermediate Frequency
100 ch
VHF (VL)
46.25MHZ ~ 168.25MHz
VHF (VH)
175.25MHz ~ 463.25MHz
UHF
471.25MHz ~ 863.25MHz
CATV
Super (S11-S20) & Hyper (S21-S41) bands receivable
VIF Carrier
38.9MHz 32.4MHz (6.5MHz)
SIF Carrier
32.9MHz (6.0MHz) 33.4MHz (5.5MHz)
Colour Sub Carrier Frequency
PAL (4.43MHz), SECAM (4.43MHz), NTSC (3.58MHz/4.43MHz)
Aerial Input Terminal
75Ohm Unbalanced
Power Input
AC 220 ~ 240V, 50Hz
Power Consumption
120W(Max.)/103W(Avg.)
Picture Tube
28 inch measured diagonally
High Voltage
28kV (in cut-off service mode)
Speaker
57 ×160 mm ellipse type ×2
Audio Output
8W + 8W
Input
Output
Input Terminal
Output Terminal Remote Control Unit
Video
1Vp-p, 75 Ohm
S/Video
Y: 1Vp-p Positive C: 0.286Vp-p
Audio (L/R)
500 mVrms, High Impedance
Video
1 Vp-p, 75 Ohm
Audio (L/R) Rear Side
500 mVrms, Low Impedance AV1 (Video/Audio/RGB) AV2 (Video/Audio/S-VHS)
Front Side
AV3 (Video/Audio)
Front Side
Headphone jack (Stereo mini jack 3.5)
Rear Side
AV1 (Video/Audio) AV2 (Video/Audio) (Selected TV, AV1 or AV3) RM-C85, Battery size:AAA/R03 x 2
Design & specifications are subject to change without notice.
2
No.51883
AV28BT7EPS (Silver) AV28BT7EPB (Black)
B/G, L/L’
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
■ 21-pin Euro connector (SCART socket) : AV-1 / AV-2 (P-P= Peak to Peak, S-W= Sync tip to white peak, B-W= Blanking to white peak) Pin No.
Signal Designation
Matching Value
AV-1
AV-2
1
AUDIO R output
500mVrms(Nominal),Low impedance
○ (TV OUT)
○ (TV/LINE OUT)
2
AUDIO R input
500mVrms(Nominal),High impedance
○
○
3
AUDIO L output
500mVrms(Nominal),Low impedance
○ (TV OUT)
○ (TV/LINE OUT)
4
AUDIO GND
○
○
5
GND (B)
○
○
6
AUDIO L input
500mVrms(Nominal), High impedance
○
○
7
B input
700mVB-W , 75Ω
○
NC
8
FUNCTON SW (SLOW SW)
Low : 0-3V, High : 8-12V, High impedance
○
NC
9
GND (G)
○
○
10
-
NC
-
11
G input
○
NC
-
NC
-
13
GND (R)
○
○
14
GND (YS)
○
NC
15
R / C input
R : 700mVB-W , 75Ω C : 300mVP-P, 75Ω
○ (R/C)
○ (only C)
16
Ys input
Low : 0 – 0.4, High : 1 - 3V, 75Ω
○
NC
17
GND(VIDEO output)
○
○
18
GND(VIDEO input)
○
○ ○ (TV/LINE OUT)
12
700mVB-W , 75Ω
19
VIDEO output
1VS-W (Negative going sync), 75Ω
○ (TV)
20
VIDEO / Y input
1VS-W (Negative going sync), 75Ω
○
○
21
COMMON GND
○
○
[Pin assignment]
No.51883
3
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
SAFETY PRECAUTIONS 1. The design of this product contains special hardware, many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Service should be performed by qualified personnel only. 2. Alterations of the design or circuitry of the products should not be made. Any design alterations or additions will void the manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injury or property damage resulting therefrom. 3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the parts list of Service manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the parts list in Service manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement part shown in the parts list of Service manual may cause shock, fire, or other hazards. 4. Don't short between the LIVE side ground and ISOLATED (NEUTRAL) side ground or EARTH side ground when repairing. Some model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE side GND, the ISOLATED(NEUTRAL) side GND and EARTH side GND. Don't short between the LIVE side GND and ISOLATED(NEUTRAL) side GND or EARTH side GND and never measure with a measuring apparatus (oscilloscope etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND or EARTH side GND at the same time. If above note will not be kept, a fuse or any parts will be broken. 5. If any repair has been made to the chassis, it is recommended that the B1 setting should be checked or adjusted (See ADJUSTMENT OF B1 POWER SUPPLY).
9. Isolation Check (Safety for Electrical Shock Hazard) After re-assembling the product, always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/audio input and output terminals, Control knobs, metal cabinet, screwheads, earphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. (1) Dielectric Strength Test The isolation between the AC primary circuit and all metal parts exposed to the user, particularly any exposed metal part having a return path to the chassis should withstand a voltage of 3000V AC (r.m.s.) for a period of one second. (. . . . Withstand a voltage of 1100V AC (r.m.s.) to an appliance rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V or more, for a period of one second.) This method of test requires a test equipment not generally found in the service trade. (2) Leakage Current Check Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Using a "Leakage Current Tester", measure the leakage current from each exposed metal part of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground (water pipe, etc.). Any leakage current must not exceed 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.2mA AC (r.m.s.). z Alternate Check Method Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Use an AC voltmeter having 1000 ohms per volt or more sensitivity in the following manner. Connect a 1500: 10W resistor paralleled by a 0.15PF AC-type capacitor between an exposed metal part and a known good earth ground (water pipe, etc.). Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Any voltage measured must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). However, in tropical area, this must not exceed 0.3V AC (r.m.s.). This corresponds to 0.2mA AC (r.m.s.).
6. The high voltage applied to the picture tube must conform with that specified in Service manual. Excessive high voltage can cause an increase in X-Ray emission, arcing and possible component damage, therefore operation under excessive high voltage conditions should be kept to a minimum, or should be prevented. If severe arcing occurs, remove the AC power immediately and determine the cause by visual inspection (incorrect installation, cracked or melted high voltage harness, poor soldering, etc.). To maintain the proper minimum level of soft X-Ray emission, components in the high voltage circuitry including the picture tube must be the exact replacements or alternatives approved by the manufacturer of the complete product. 7. Do not check high voltage by drawing an arc. Use a high voltage meter or a high voltage probe with a VTVM. Discharge the picture tube before attempting meter connection, by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10k: 2W resistor to the anode button. 8. When service is required, observe the original lead dress. Extra precaution should be given to assure correct lead dress in the high voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of overheating should be replaced. Always use the manufacturer's replacement components.
4
No.51883
AC VOLTMETER (HAVING 1000 :/V, OR MORE SENSITIVITY)
0.15μF AC-TYPE
1500 : 10W GOOD EARTH GROUND
PLACE THIS PROBE ON EACH EXPOSED METAL PART
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
FEATURES 1. It is a remte controlled color television. 2. 100 programs from VHF, UHF bands or cable channels can be preset. 3. It can tune cable channels. 4. Controlling the TV is very easy by its menu driven system. 5. It has two Euroconnector sockets for external device (such as video recorder, video games, audio set, etc.) 6. Front AV Input available. 7. Stereo sound systems (German + Nicam) are available. 8. Full function Teletext (Fastext, Toptext).
9. 10. 11. 12. 13. 14. 15.
It is possible to connect headphone. Direct channel access. APS (Automatic Programming System). All programs can be named. Forward or backward automatic tuning. Automatic sound mute when no transmission. 5 minutes after the broadcasting (closedown), the TV switches itself automatically to stand-by mode.
MAIN DIFFERENCE LIST MODEL No. Parts Name
AV28BT7ENS (Silver)
AV28BT7ENB (Black)
AV28BT7EES (Silver)
AV28BT7EEB (Black)
AV28BT7EPB (Black)
MAIN PWB
VE-20073586
F CARTON BOX
VE-20083462
VE-20083400
VE-20083464
VE-20083469
VE-20083471
VE-20083484
INST BOOK
VE-20083463
VE-20083402
VE-20083466
VE-20083468
VE-20083470
VE-20083483
RATING LABEL
VE-20083403
VE-20083401
VE-20083465
VE-20083467
VE-20083482
VE-20083485
FRONT CABINET
VE-20082289
VE-20081489
VE-20082289
VE-20081489
VE-20082289
VE-20081489
BACK COVER
VE-20082322
VE-20069017
VE-20082322
VE-20069017
VE-20082322
VE-20069017
TV RF system
B/G
B/G, D/K,K1
PAL
PAL / SECAM
TV Colour system
VIDEO
PAL NTSC 3.58 NTSC 4.43
VE-20073447
AV28BT7EPS (Silver) VE-20081473
B/G,L/L’
PAL / SCAM NTSC 3.58 NTSC 4.43
No.51883
5
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
SPECIFIC SERVICE INSTRUCTIONS DISASSEMBLY PROCEDURE REMOVING THE REAR COVER 1. Remove the 8 screws marked A. 2. Withdraw the rear cover toward you.
REMOVING THE FRONT AV + HEADPHONE JACK BOARD ASS’Y z After removing the rear cover. 1. Remove the 2 screws marked B, and remove the FRONT AV + HEADPHONE JACK BOARD ASS’Y.
REMOVING THE FRONT CONTROL PWB z After removing the rear cover. 1. Remove the MAIN PWB ASS’Y. 2. Remove the 5 screws marked C, and remove the FRONT CONTROL PWB.
REMOVING THE SPEAKER z After removing the rear cover. 1. Remove the 4 screws marked D, and remove the SPEAKER. 2. Remove an opposite side similarly.
REMOVING THE MAIN PWB z After removing the rear cover. 1. Draw out back and remove the MAIN PWB ASS’Y, CAUTIONS) Be careful enough when developing a main chassis. The wire of a POWER TRANSFER does not separate and short-circuit with other parts.
6
No.51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
A
(×8) REAR COVER
FRONT CABINET
SPEAKER
D
(×4)
B
MAIN PWB
(×2)
C
(×5)
D (×4) SPEAKER
FRONT CONTROL PWB FRONT AV + HEADPHONE JACK PWB
No.51883
7
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
SETTING OF THE LAST MEMORY FOR SHIPMENT ■ USER SETTING VALUES Setting Item
Setting Value
Setting Item
SOUND MENU
Setting Value FEATURE MENU
BASS
CENTER
SLEEP TIMER
OFF
TREBLE
↑
CHILD LOCK
OFF
BALANCE
↑
EFFECT
OFF PICTURE MENU
BRIGHTNESS COLOUR CONTRAST SHARPNESS HUE (only NTSC) PICTURE MODE
INSTALL-> TV CONFIG. MENU
These adjust are automatically restored when APS bit in Service menu is set.
LANGUAGE
ENGLISH
COUNTRY
?
AV-2 OUTPUT
TV
The procedure for setting APS bit is described bellow. AUTO
■ SETTING APS BIT IN SERVICE MENU 1) 2) 3) 4) 5)
Enter service menu in TV mode by pressing “INFO” and “MUTING” keys simultaneously. Service Menu will appear. Select OPTIONS by pressing Up/Down keys on remote control unit. Enter OPTIONS by pressing Left/Right keys on remote control unit. Select OPTION 8 by pressing Up/Down keys on remote control unit. Selected bit in one OPTION is shown by blinking character. Select B2 by pressing Left/Right keys on remote control unit. DO NOT CHANGE ANY OTHER BIT. 6) Press digit key “1” to set APS bit. 7) Press “STANDARD” key on remote control unit to exit service mode.
8
No.51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
SERVICE ADJUSTMENTS ADJUSTMENT PREPARATION 1. You can make the necessary adjustments for this unit with either the Remote Control Unit or With the adjustment tools and parts as given below. 2. Adjustment with the Remote Control Unit is made on the basis of the initial setting values, however, the new setting values which set the screen to its optimum condition may differ from the initial settings. 3. Make sure that AC power is turned on correctly. 4. Turn on the power for set and test equipment before use, and start the adjustment procedures after waiting at least 30 minutes. 5. Unless otherwise specified, prepare the most suitable reception or input signal for adjustment.
6. Never touch any adjustment parts which are not specified in the list for this adjustment - variable resistors, transformers, condensers, etc. 7. Presetting before adjustment. Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit: VIDEO STATUS
STANDARD
TINT/COLOR PICTURE/BRIGHT
CENTER
DETAIL
ADJUSTMENT EQUIPMENT 1. DC voltmeter (or digital voltmeter) 2. Signal generator (Pattern generator)［PAL/SECAM/NTSC］ 3. Remote control unit
MAIN PARTS LOCATIONS HEADPHONE JACK FRONT
TOP VIDEO R
L
AUDIO.
LED REMOCON RECEIVER
MENU （＋） （－） PROG /Ch.
（＋） （－） VOL
FRONT
IC502 MEMORY IC
IC501 MICOM
FBT
MULTI SOUND PWB
TUNER
SCART jack
SCART jack
AV-1
AV-2
B1 (Indicated [150/115V] on the bottom side)
No. 51883
UPPER : FOCUS VR LOWER : SCREEN VR
9
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
BASIC OPERATION SERVICE MENU ■ HOW TO ENTER THE SERVICE MODE 1)
Press the INFORMATION key and MUTING key of REMOTE CONTROL UNIT simultaneously.
SERVICE ADJUST…..
■ SELECTION OF ADJUSTMENT ITEMS 1) 2) 3) 4)
OPTIONS…..
Press the UP ( ) or DOWN ( ) key and select the service menu item. Press the RIGHT ( ) or LEFT ( ) key and enter ADJUSTMENT SCREEN. Select the ADJUST No., use RIGHT ( ) / LEFT ( ) key of remote control unit. To change the selected parameter, use RIGHT ( ) and LEFT ( ) key.
SERVICE MENU ITEM
SERVICE MENU SCREEN
ADJUST No. ADJUST
PARAMETER VALUE
***
******
PARAMETER
*** OUT
UP
■ HOW TO EXIT SERVICE MODE ADJUSTMENT SCREEN
1) Press the STANDARD Key on REMOTE CONTROL UNIT.
■ ADJUSTMENT SERVICE MENU ADJUSTMENT ITEM
REMOTE CONTROL UNIT key NAME
DISCRIPTION
00
White Point RED
01
White Point GREEN
02
White Point BLUE
AGC
03
AGC
IF-PLL NEGATIVE
04
IF-PLL Negative
IF-PLL POSITIVE
05
IF-PLL Positive
06
Y-Delay PAL
07
Y-Delay SECAM
08
Y-Delay NTSC
10
4 : 3 PICTURE MODE
21
16 : 9 PICTURE MODE
11
4 : 3 PICTURE MODE
22
16 : 9 PICTURE MODE
12
4 : 3 PICTURE MODE
23
16 : 9 PICTURE MODE
13
4 : 3 PICTURE MODE
24
16 : 9 PICTURE MODE
14
4 : 3 PICTURE MODE
25
16 : 9 PICTURE MODE
15
4 : 3 PICTURE MODE
26
16 : 9 PICTURE MODE
16
4 : 3 PICTURE MODE
27
16 : 9 PICTURE MODE
17
4 : 3 PICTURE MODE
28
16 : 9 PICTURE MODE
18
4 : 3 PICTURE MODE
29
16 : 9 PICTURE MODE
19
4 : 3 PICTURE MODE
30
16 : 9 PICTURE MODE
20
4 : 3 PICTURE MODE
31
16 : 9 PICTURE MODE
WHITE BALANCE
LUMINANCE DELAY
VERTICAL ZOOM
VERTICAL SCROLL
4 : 3 HORIZONTAL SHIFT
VERTICAL SLOPE
VERTICAL AMPLITUDE
S-CORRECTION
VERTICAL SHIFT
EW WIDTH
EW PARABOLA WIDTH
EW CORNER PARABOLA
EW TRAPEZIUM
10
ADJUST No.
MUTING key
No. 51883
STANDARD key UP / DOWN ( / ) key
INFORMATION key
RIGHT / LEFT ( / ) key
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
ADJUSTMENTS Item SCREEN VOLTAGE Adjustment
Measuring instrument
Test point
Adjustment part SCREEN VR
Signal Generator
[FBT]
Remote Control unit
OPTION 02
SERVICE MENU
Description 1. Receive a PAL colour bar. 2. Enter the option settings in the SERVICE MENU. 3. Press the UP / DOWN ( ▲/ ▼) key, and Enter Option 02. 4. To change bit 6, come on to it by using L / R ( / ) key and make it “1” by pressing “1” white bit 2 is blinking. 5. Observe the thin horizontal blue-white line in the middle of the screen, and adjust the lower VR of the FBT, until the line is in its thinnest visible thickness. 6. Then make Option 02 bit 6 “0” , by pressing “0” on the remote control unit, although you do not see any picture.
SERVICE ADJUST….. OPTIONS…..
SELECT OPTION menu
FBT
FOCOUS
SCREEN
FOCUS Adjustment
Signal generator
B1 VOLTAGE check
DC Voltmeter
FOCUS VR [FBT]
Marked
1. Receive a PAL circle pattern. 2. Adjust the upper VR of the FBT, until you get the Optinum focus, the sharpest picture.
1.
[150/115V] on the MAIN PWB
No. 51883
Check whether the voltage at the point named and silk screened as “150 / 115V” on the MAIN PWB is 150V DC.
11
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
Item WHITE BALANCE
Measuring instruments Signal generator
Test point
Adjustment part ADJUST 00 (White point - RED) ADJUST 01 (White point - GREEN)
Description [LOW LIGHT] 1. Receive a whole black signal. 2. Adjust the
ADJUST 02 (White point - BLUE)
[HIGH LIGHT]
ADJUST 03
1. 2. 3.
Receive a any broadcast. Select
IF-PLL NEGATIVE Adjustment
ADJUST 04
1. 2.
Select
IF-PLL POSITIVE Adjustment
ADJUST 05
1. 2.
Select
AGC Adjustment
12
DC voltmeter
1. Receive a white and black signal (colour off). 2. Adjust the
No. 51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
Item LUMINANCE DELAY Adjustment
Measuring instruments Signal generator
Test point
Adjustment part Adjust 06
Description [ Y-Delay PAL ] 1. Receive a PAL colour bar signal. 2. Select
Adjust 07
[ Y-Delay SECAM ] 1. Receive a SECAM colour bar signal. 2. Select
Adjust 08
[ Y-Delay NTSC ] 1. Receive a NTSC colour bar signal. 2. Select
No. 51883
13
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
Item
Measuring instruments
VERTICAL ZOOM Adjustment
Signal generator
VERTICAL SCROLL Adjustment
Signal generator
4:3 HORIZONTAL SHIFT Adjustment
Signal generator
VERTICAL SLOPE Adjustment
Signal generator
VERTICAL AMPLITUDE Adjustment
Signal generator
14
Test point
Adjustment part Adjust 10 ( 4 : 3 ) Adjust 21 ( 16 : 9 )
Adjust 11 ( 4 : 3 ) Adjust 22 ( 16 : 9 )
Adjust 12 ( 4 : 3 ) Adjust 23 ( 16 : 9 )
Adjust 13 ( 4 : 3 ) Adjust 24 ( 16 : 9 )
Adjust 14 ( 4 : 3 ) Adjust 25 ( 16 : 9 )
No. 51883
Description 1. 2. 3. 4.
Receive a PAL circle test pattern. Set < 4 : 3 aspect mode >. Select < ADJUST 10 > from SERVICE MENU. Change vertical zoom till you see the upper and olwer limit of the circle as close to the upper and lower limit of the picture tube as possible. 5. Set < 16 : 9 aspect mode >. 6. Adjusts with the step which is the same above from 3 to 4 about the 16 : 9 aspect mode, too.
1. 2. 3. 4.
Receive a PAL circle test pattern. Set < 4 : 3 aspect mode >. Select < ADJUST 11 > from SERVICE MENU. Change vertical scroll till you see the circle exactly un the middle of the screen. 5. Set < 16 : 9 aspect mode >. 6. Adjusts with the step which is the same above from 3 to 4 about the 16 : 9 aspect mode, too. 1. 2. 3. 4.
Receive a RED PURITY test pattern. Set < 4 : 3 aspect mode >. Select < ADJUST 12 > from SERVICE MENU. Change horizontal shift till the picture is horizontally centered. Check whether this adjustment is correct after completing Service Mode Adjustment. 5. Set < 16 : 9 aspect mode >. 6. Adjusts with the step which is the same above from 3 to 4 about the 16 : 9 aspect mode, too.
1. 2. 3. 4.
Receive a CROSS-HATCH signal. Set < 4 : 3 aspect mode >. Select < ADJUST 13 > from SERVICE MENU. Change vertical slope till the size of squares on both the upper and lower part of test pattern become equal to the squares laying on the vertical centre of the test pattern. 5. Check and readjust VERTICAL SLOPE item if the adjustment becomes improper after some other geometric adjustments are done. 6. Set < 16 : 9 aspect mode >. 7. Adjusts with the step which is the same above from 3 to 5 about the 16 : 9 aspect mode, too.
1. 2. 3. 4.
Receive a PAL test pattern signal. Set < 4 : 3 aspect mode >. Select < ADJUST 14 > from SERVICE MENU. Change vertical slope till horizontal black lines on both the upper and lower part of the test pattern become very close to the upper and lower horizontal sides of picture tube and nearly about to disappear. 5. Check and readjust VERTICAL AMPLITUDE item if the adjustment becomes improper after some other geometric adjustments are done. 6. Set < 16 : 9 aspect mode >. 7. Adjusts with the step which is the same above from 3 to 5 about the 16 : 9 aspect mode, too.
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
Item
Measuring instrument
S-CORRECTION Signal Adjustment generator
Test point
Adjustment part Adjust 15 ( 4 : 3 ) Adjust 26 ( 16 : 9 )
VERTICAL SHIFT Adjustment
Signal generator
EW WIDTH Adjustment
Signal generator
Adjust 16 ( 4 : 3 ) Adjust 27 ( 16 : 9 )
Adjust 17 ( 4 : 3 ) Adjust 28 ( 16 : 9 )
EW PARABOLA WIDTH
Signal generator
Adjustment
EW CORNER Signal PARABOLA generator Adjustment
Adjust 18 ( 4 : 3 ) Adjust 29 ( 16 : 9 )
Adjust 19 ( 4 : 3 ) Adjust 30 ( 16 : 9 )
Description 1. 2. 3. 4.
Receive a PAL circle pattern signal. Set < 4 : 3 aspect mode >. Select < ADJUST 15 > from SERVICE MENU. Change S-correction till the middle part of the circle is round as possible. 5. Set < 16 : 9 aspect mode >. 6. Adjusts with the step which is the same above from 3 to 4 about the 16 : 9 aspect mode, too. 1. Receive a PAL test pattern signal ( or the symmetrical signal in the top and the bottom and on either side to find ). 2. Set < 4 : 3 aspect mode >. 3. Select < ADJUST 16 > from SERVICE MENU. 4. Change Vertical Shift till the test pattern is vertically centred, i.e. horizontal line at the centre pattern is in equal distance both to upper and lower side of the picture tube. 5. Check and readjust Vertical Shift item if the adjustment becomes improper after some other geometric adjustments are done. 6. Set < 16 : 9 aspect mode >. 7. Adjusts with the step which is the same above from 3 to 5 about the 16 : 9 aspect mode, too. 1. 2. 3. 4.
Receive a PAL test pattern signal. Set < 4 : 3 aspect mode >. Select < ADJUST 17 > from SERVICE MENU. Change EW Width till the vertical black and white bars on both left and right side of the pattern exactly disappear. 5. Set < 16 : 9 aspect mode >. 6. Adjusts with the step which is the same above from 3 to 4 about the 16 : 9 aspect mode, too. 1. 2. 3. 4.
Receive a PAL test pattern signal. Set < 4 : 3 aspect mode >. Select < ADJUST 18 > from SERVICE MENU. Change EW Parabola Width till vertical lines close to the both sides of the picture frame become parallel to vertical side of picture tube. 5. Check and readjust EW Parabola Width item if the adjustment becomes improper after some other geometric adjustments are done. 6. Set < 16 : 9 aspect mode >. 7. Adjusts with the step which is the same above from 3 to 5 about the 16 : 9 aspect mode, too. 1. 2. 3. 4.
Receive a PAL test pattern signal. Set < 4 : 3 aspect mode >. Select < ADJUST 19 > from SERVICE MENU. Change EW Corner Parabola till vertical lines at the corners of both sides of picture frame become vertical and parallel to vertical corner sides of picture tube. 5. Check and readjust EW Corner Parabola item if the adjustment becomes improper after some other geometric adjustments are done. 6. Set < 16 : 9 aspect mode >. 7. Adjusts with the step which is the same above from 3 to 5 about the 16 : 9 aspect mode, too.
No. 51883
15
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
Item EW TRAPEZIUM Adjustment
16
Measuring instrument Signal generator
Test point
Adjustment part Adjust 20 ( 4 : 3 ) Adjust 31 ( 16 : 9 )
Description 1. 2. 3. 4.
Receive a PAL circle pattern signal. Set < 4 : 3 aspect mode >. Select < ADJUST 20 > from SERVICE MENU. Change EW Trapezium till vertical lines, especially lines at the sides of the picture frame became parallel to the both sides of picture tube as possible. 5. Check and readjust EW Trapezium item if the adjustment becomes improper after some other geometric adjustment. 6. Set < 16 : 9 aspect mode >. 7. Adjusts with the step which is the same above from 3 to 5 about the 16 : 9 aspect mode, too.
No. 51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
PARTS LIST CONTENTS USING PW BOARD & REMOTE CONTROL UNIT ･･････････････････････････････････････････････････････ 17 EXPLODED VIEW PARTS LIST ･･････････････････････････････････････････････････････････････････････････ 18 EXPLODED VIEW ････････････････････････････････････････････････････････････････････････････････････････ 19 PRINTED WIRING BOARD PARTS LIST
[ AV28BT7ENS / AV28BT7ENB] z
MAIN PW BOARD ASS'Y ･･････････････････････････････････････････････････････････････････････････････････････ 20
z
MULTI SOUND PW BOARD ASS’Y ･････････････････････････････････････････････････････････････････････････････ 25
z
CRT SOCKET PW BOARD ASS'Y ･･････････････････････････････････････････････････････････････････････････････ 26
z
FRONT CONTROL PW BOARD ASS’Y ･･････････････････････････････････････････････････････････････････････････ 26
z
FRONT AV + HEADPHONE JACK PW BOARD ASS’Y･････････････････････････････････････････････････････････････ 26
z
PROTECTION MODULE PW BOARD ASS’Y ･････････････････････････････････････････････････････････････････････ 26
z
T(SPOT KILLER) MODULE PW BOARD ASS’Y･･･････････････････････････････････････････････････････････････････ 26
[ AV28BT7EES / AV28BT7EEB] z
MAIN PW BOARD ASS'Y ･･････････････････････････････････････････････････････････････････････････････････････ 27
[ AV28BT7EPS / AV28BT7EPB] z
MAIN PW BOARD ASS'Y ･･････････････････････････････････････････････････････････････････････････････････････ 32
z
MULTI SOUND PW BOARD ASS’Y ･････････････････････････････････････････････････････････････････････････････ 37
PACKING / PACKING PARTS LIST
･･････････････････････････････････････････････････････････････････････ 39
USING PW BOARD & REMOTE CONTROL UNIT PWB ASS'Y
AV28BT7ENS AV28BT7ENB
AV28BT7EES AV28BT7EEB
AV28BT7EPS AV28BT7EPB
MAIN PWB
VE-20073586
VE-20073447
VE-20071473
MULTI SOUND PWB
VE-20078991
CRT SOCKET PWB
VE-20074437
FRONT CONTROL PWB
VE-20001612
FRONT AV + HEADPHONE JACK PWB
VE-20083646
PROTECTION MODULE PWB
VE-20058569
T(SPOT KILLER) MODELE PWB
VE-20019598
Model
REMOTE CONTROL UNIT
VE-20079020
RM-C85
No. 51883
17
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
EXPLODED VIEW PARTS LIST [ SILVER model : AV28BT7ENS, AV28BT7EES, AV28BT7EPS]
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18
No. 51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
EXPLODED VIEW
17
16
13
12
V01
11
FRONT AV + HEADPHONE JACK PWB
FRONT CONTROL PWB MAIN PWB
15
5
8 7 6
13
12
11
14
3
4 10
9
2
No. 51883
1
19
AV28BT7ENS / AV28BT7ENB
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20
No. 51883
AV28BT7ENS / AV28BT7ENB
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27
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AV28BT7EES / AV28BT7EEB
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No. 51881
29
AV28BT7EES / AV28BT7EEB
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AV28BT7EES / AV28BT7EEB
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No. 51881
31
AV28BT7EPS / AV28BT7EPB
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No. 51883
AV28BT7EPS / AV28BT7EPB
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No. 51883
33
AV28BT7EPS / AV28BT7EPB
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No. 51883
AV28BT7EPS / AV28BT7EPB
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AV28BT7EPS / AV28BT7EPB
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1)93)9- 1)93)9- 1)91)9.5 1)9. 1)9-
5 5 5 5 5 5 5 5
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&)5(6 &)5(6 &)5(6 60'5(6 60'5(6 60'5(6 60'5(6 60'5(6
:.:.:.:.- :.- :.- :.- :.-
& & & & & & & &
9( 9( 9( 9( 9( 9( 9( 9(
60'&$3 (/&$3 60'&$3 60'&$3 60'&$3 60'&$3 (/&$3 0.7&$3
1)9.5 8)90 1)9. 1)9. 1)9. 1)9. 8)90 1)9-
5 5 5 5 5 5 5 5
9( 9( 9( 9( 9( 9( 9( 9(
60'5(6 60'5(6 60'5(6 60'5(6 60'5(6 60'5(6 60'5(6 )86(5(6
:.- :.- :.- :.- :.- :.- :5- :5-
& & & & & & & &
9( 9( 9( 9( 9( 9( 9( 9(
(/&$3 60'&$3 (/&$3 60'&$3 60'&$3 (/&$3 60'&$3 60'&$3
8)90 1)9. 8)90 1)9. 1)9. 8)90 1)9. 1)9.
5 5 5 5 5 5 5 5
9( 9( 9( 9( 9( 9( 9( 9(
60'5(6 60'5(6 60'5(6 60'5(6 60'5(6 60'5(6 60'5(6 60'5(6
:.:.- : 5- :.- :5:5:5:5-
& & & & & & & &
9( 9( 9( 9( 9( 9( 9( 9(
60'&$3 (/&$3 (/&$3 60'&$3 60'&$3 60'&$3 60'&$3 60'&$3
1)9. 8)90 8)90 1)9. 1)9.5 1)9. 1)9.5 1)9.5
5 5 5
9( 9( 9(
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:.:.- :5-
&2,/
&$3$&,725 & & & & & & & &
9( 9( 9( 9( 9( 9( 9( 9(
60'&$3 60'&$3 60'&$3 60'&$3 (/&$3 60'&$3 0.7&$3 (/&$3
3)9-&+ 3)9-&+ 3)9-&+ 1)9.5 8)90 1)9. 1)98)90
& & & & & & & &
9( 9( 9( 9( 9( 9( 9( 9(
60'&$3 60'&$3 0.7&$3 (/&$3 60'&$3 (/&$3 (/&$3 (/&$3
1)9.5 1)9.5 1)98)90 1)9. 8)90 8)90 8)90
& & & & & & & &
9( 9( 9( 9( 9( 9( 9( 9(
(/&$3 (/&$3 60'&$3 60'&$3 60'&$3 60'&$3 (/&$3 60'&$3
8)90 8)90 1)9.5 1)9.5 1)9.5 1)9.5 8)90 1)9.
& & & & & & & &
9( 9( 9( 9( 9( 9( 9( 9(
(/&$3 60'&$3 60'&$3 (/&$3 60'&$3 0.7&$3 60'&$3 0.7&$3
8)90 3)9- 3)9- 8)90 3)9- 1)93)9- 1)9-
& & & & &
9( 9( 9( 9( 9(
60'&$3 0.7&$3 60'&$3 (/&$3 60'&$3
3)9- 1)93)9- 8)90 3)9-
/ / / / / / / /
9( 9( 9( 9( 9( 9( 9( 9(
),;('&2,/ ),;('&2,/ ),;('&2,/ ),;('&2,/ ),;('&2,/ ),;('&2,/ ),;('&2,/ ),;('&2,/
8+4.$ 8+4.$ 8+4.$ 8+4. 8+40$ 8+4. 8+4. 8+4.
/
9(
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8+4.
',2'( ' ' ' '
9( 9( 9( 9(
',2'(=(1(5 ',2'( ',2'( ',2'(
75$16,6725 4 4 4 4
9( 9( 9( 9(
75%&% 75%&% 75%&% 75%&%
,& ,& ,&
9( 9(
,& ,&
27+(56 9/ 95 ; = =
9( 9( 9( 9( 9(
$'-&2,/ $'-5(6 ;7$/ ),/7(56$: ),/7(56$:
:.9(5 0$1
No. 51883
37
AV28BT7EPS / AV28BT7EPB
[ AV28BT7EPS / AV28BT7EPB ]
CRT SOCKET P.W. BOARD ASS’Y (VE-20074437) Refer to PARTS LIST in page 25 for this P.W. board.
FRONT CONTROL P.W. BOARD ASS’Y (VE-20001612) Refer to PARTS LIST in page 25 for this P.W. board.
FRONT AV + HEADPHONE JACK P.W. BOARD ASS’Y (VE-20083646) Refer to PARTS LIST in page 25 for this P.W. board.
PROTECTION MODULE P.W. BOARD ASS’Y (VE-20058569) Refer to PARTS LIST in page 25 for this P.W. board.
T(SPOT KILLER) MODULE P.W. BOARD ASS’Y (VE-20019598) Refer to PARTS LIST in page 25 for this P.W. board.
38
No. 51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
PACKING 2
4 3 5
6
7
1
8
2
PACKING PARTS LIST 3DUW1R 3DUW1DPH 'HVFULSWLRQ 5HI1R
9( 9( 9( 9( 9( 9( 9( 9(
)&$5721%2; )&$5721%2; )&$5721%2; )&$5721%2; )&$5721%2; )&$5721%2; &86+,21$66·< 32/<%$*
9( 50& 9( 9( 9( %77. 9( 9( 9( 9( 9( 9(
32/<%$* 5(027(&21752/81,7 ,167%22. ,167%22. ,167%22. :$55$17<&$5' /$%(/ /$%(/ /$%(/ /$%(/ /$%(/ /$%(/
$9%7(16 $9%7(1% $9%7((6 $9%7((% $9%7(36 $9%7(3%
$9%7(16(1% $9%7((6((% $9%7(36(3% $9%7(16 $9%7(1% $9%7((6 $9%7((% $9%7(36 $9%7(3%
No. 51883
39
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
WAVEFORM DIAGRAMS MAIN PWB Q802
D
8Vp-p(H)
IC401
6pin
1.7Vp-p(H)
IC050
6pin
0.7Vp-p(H)
IC050
17pin
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
1.4Vp-p(H)
STANDARD CIRCUIT DIAGRAM NOTE ON USING CIRCUIT DIAGRAMS 1.SAFETY The components identified by the symbol and shading are critical for safety. For continued safety replace safety critical components only with manufactures recommended parts.
IC401
17pin
0.7Vp-p(H)
IC401
30pin
0.8Vp-p(H)
IC401
29pin
0.9Vp-p(H)
IC401
19pin
2.SPECIFIED VOLTAGE AND WAVEFORM VALUES The voltage and waveform values have been measured under the following conditions.
2Vp-p(H)
(1)Input signal
: Colour bar signal
(2)Setting positions of each knob/button and variable resistor
IC401
20pin
2Vp-p(H)
IC401
21pin
2Vp-p(H)
IC401
40pin
1Vp-p(H)
Q605
: Original setting position when shipped
(3)Internal resistance of tester
:DC 20k
(4)Oscilloscope sweeping time
:H
20µS/div
:V
5mS/div
C
450Vp-p(H)
/V
:Others (5)Voltage values
(1)Resistors Resistance value No unit
0.6Vp-p(V)
IC701
1pin
4.8Vp-p(V)
IC701
9pin
0.5Vp-p(V)
IC501 1.2Vp-p
34pin
K M
:[ ] :[K ] :[M
]
Type No indication
:Carbon resistor
OMR
:Oxide metal film resistor
MFR
:Metal film resistor
MPR
:Metal plate resistor
UNFR
:Uninflammable resistor
FR
:Fusible resistor
Composition resistor 1/2 [W] is specified as 1/2S or Comp. (2)Capacitors Capacitance value
CRT SOCKET PWB IC901 35Vp-p(H)
2-4
7pin
IC901 35Vp-p(H)
8pin
IC901
9pin
1 or higher less than 1
:DC withstand voltage [V]
AC indicated :AC withstand voltage [V] Electrolytic Capacitors 47/50[Example]:Capacitance value [µF]/withstand voltage[V] Type No indication MM PP MPP MF TF BP TAN
:Ceramic capacitor :Metalized mylar capacitor :Polypropylene capacitor :Metalized polypropylene capacitor :Metalized film capacitor :Thin film capacitor :Bipolar electrolytic capacitor :Tantalum capacitor
(3)Coils No unit
:[ µ H]
Others
:As specified
:All DC voltage values
3.INDICATIONS ON THE CIRCUIT DIAGRAM
47pin
:DC50[V]
Others
Sweeping time is specified
Since the voltage values of signal circuit vary to some extent according to adjustments, use them as reference values.
IC401
Withstand voltage No indication
:[pF]
4.NOTE FOR REPAIRING SERVICE This model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE side GND and the ISOLATED(NEUTRAL) side GND.Therefore, care must be taken for the following points. (1)Do not touch the LIVE side GND or the LIVE side GND and the ISOLATED(NEUTRAL) side GND simultaneously. If the above caution is not respected, an electric shock may be caused. Therefore, make sure that the power cord is surely removed from the receptacle when, for example, the chassis is pulled out. (2)Do not short between the LIVE side GND and ISOLATED(NEUTRAL) side GND or never measure with a measuring apparatus measure with a measuring apparatus ( oscilloscope, etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND at the same time. If the above precaution is not respected , a fuse or any parts will be broken. Since the circuit diagram is a standard one, the circuit and circuit constants may be subject to change for improvement without any notice. NOTE Due improvement in performance, some part numbers show in the circuit diagram may not agree with those indicated in the part list. When ordering parts, please use the numbers that appear in the Parts List.
:[µF]
35Vp-p(H)
No.51883
Jan. 2002 No. 51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
C
E C B
B C E (G)(D)(S)
E C B
E C B
B
E C B
E
FBT SCART1
TOP VIEW CHIP TR
FRONT VIEW
VIDEO PROCESSOR TDA 884X
BOTTOM VIEW
CTI & COMB FILTER
TRANSISTOR
MSP 34X0D
SEMICONDUCTOR SHAPES
DIGITAL SOUND PROCESSOR
HORIZONTAL OUTPUT
2-15
VERTICAL OUTPUT TDA8351/6
VOLTAGE TABLES
VIDEO SWITCH TEA6415
2-11 2-13 2-13
MAIN PWB PATTERN MULTISOUND, CRT SOCKET & FRONT CONTROL PWB PATTERN FRONT AV + HEADPHONE JACK PWB PATTERN
SVHS
PATTERN DIAGRAMS
SCART2
2-5 2-7 2-9 2-9 2-9
CRT
MAIN PWB CIRCUIT DIAGRAM MULTISOUND PWB CIRCUIT DIAGRAM CRT SOCKET PWB CIRCUIT DIAGRAM FRONT CONTROL PWB CIRCUIT DIAGRAM FRONT AV + HEADPHONE JACK PWB CIRCUIT DIAGRAM
RGB AMP. TDA 6108
2-4
8R 6/12W
2-3
SPEAKERS
2-2
AUDIO OUTPUTS TDA2615/6 TDA2614(MONO)
SEMICONDUCTOR SHAPES BLOCK DIAGRAM WAVEFORM DIAGRAMS CIRCUIT DIAGRAMS
8R 6/12W
BLOCK DIAGRAM
CONTENTS
CHIP IC TOP VIEW 1
N N
N
1
N
N
2-2
No.51883
No.51883
IR.
N
N
PLL TUNER UV1315/6
1
KEYPAD
1
IN E OUT
NVM
IN
SMPS (Mc44604)
N
TV-TEXT CONTROLLER SDA 555X
1
OUT E
115/150VDC +12VDCAud. -12VDCAud. 12VDC 8VDC 5VDC 3.3V st-by 2.5V st-by
TOP VIEW
I2C
FRONT VIEW
SERVICE CONNECTOR
BOTTOM VIEW
FRONTAV
IC
2-3
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
CIRCUIT DIAGRAMS
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
MAIN PWB CIRCUIT DIAGRAM
MAIN PWB VE-20073447(AV28BT7EES/EEB) VE-20073586(AV28BT7ENS/ENB) VE-20071473(AV28BT7EPS/EPB) No.51883
!
2-5
2-6
No.51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
MULTISOUND PWB CIRCUIT DIAGRAM
MULTISOUND PWB VE-20078991(AV28BT7ENS/ENB, AV28BT7EES/EEB) VE-20079020(AV28BT7EPS/EPB) No.51883
"
2-7
2-8
No.51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
CRT SOCKET PWB CIRCUIT DIAGRAM
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
CRT SOCKET PWB VE-20074437
FRONT AV + HEAD PHONE JACK PWB CIRCUIT DIAGRAM
FRONT CONTROL PWB CIRCUIT DIAGRAM
FRONT AV + HEAD PHONE JACK PWB VE-20083646
FRONT CONTROL PWB VE-20001612 No.51883
#
2-9
2-10
No.51883
PATTERN DIAGRAMS MAIN
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
PWB PATTERN
FRONT
No.51883
$
2-11
2-12
No.51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
MULTISOUND PWB PATTERN
CRT SOCKET PWB PATTERN
TOP
TOP
FRONT AV + HEADPHONE JACK
FRONT CONTROL PWB PATTERN (PARTS SIDE)
PWB PATTERN
FRONT
TOP
No.51883
%
2-13
2-14
No.51883
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
VOLTAGE TABLES MAIN PWB
IF PWB IC701
IC050 PIN NO. 1 2 3 4 5 6 7 8 9 10
VOLTAGE 2.8 4.5 2.9 4.8 2.9 3.2 0 2.9 7.9 4.0
PIN NO. 11 12 13 14 15 16 17 18 19 20
PIN NO. 1 2 3 4 5
VOLTAGE 3.0 0 4.0 2.8 4.0 4.0 4.0 4.0 0 3.7
VOLTAGE 0.3 3.7 0 0 2.5 3.0 4.5 4.5 6.7 0.1 3.7 7.8 4.0 0 3.0 0 3.7 5.4 3.5 3.1 3.4 2.1 3.5 3.5 3.5 0.1 3.0 3.0
PIN NO. 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56
VOLTAGE 2.4 2.4 2.4 2.4 0.3 2.5 2.5 4.7 7.8 2.8 5.0 0.1 0.9 3.1 4.0 0 3.0 2.3 2.3 4.6 4.6 2.0 3.8 3.8 4.3 2.3 2.9 3.3
VOLTAGE 12.5 11.5 0
PIN NO. 4 5 6
PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
VOLTAGE 12.4 12.1 0.1 0 0.9 0.1 0.2 0.2
PIN NO. 9 10 11 12 13 14 15 16
VOLTAGE 2.6 12.4 0.1
PIN NO. 6 7 8 9
VOLTAGE 0 12.6 0 0
VOLTAGE 0 0 0 3.3 3.3 3.3 3.3 0 2.4 0 3.3 0.9 2.4 0 0.1 0 0 2.4 0.3 0.1 0 2.1 3.3 3.5 3.1 3.1
PIN NO. 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
VOLTAGE 0 0 0 3.3 3.3 3.3 3.3 0.5 0.5 0 2.4 0.3 0.2 0.3 0 2.4 0 3.3 0 3.3 3.3 3.3 3.3 3.3 3.3 3.3
VOLTAGE 0 0 0 0
PIN NO. 5 6 7 8
VOLTAGE 0.1 0.1 3.3 3.3
Q055 Q100 Q501 Q503 Q512 Q514 Q515 Q516 Q517 Q518 Q601 Q603 Q605 Q701 Q702 Q802 Q805 Q806 Q807
PIN NO. 1 2 3 4
VOLTAGE 0.8 2.6 2.3 0.2 3.0 2.4 2.6 2.4
VOLTAGE 2.1 12.5 3.3
PIN NO. 1 2 3
B(G) 3.0 0 0 2.5 4.8 0 2.4 2.4 2.4 2.4 0.1 3.1 0 0.4 0.6 0.1 0.6 0.6 0
PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
PIN NO. 1 2 3 4
VOLTAGE 2.5 0 0 4.9 0 0 4.9 0 4.5 4.5 2.4 2.4 2.4 0.1 0.1 0.1 0 4.8 0 0 0 0 0 4.9 0.1 0.1 0 0 0 0 0 0
PIN NO. 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64
VOLTAGE 3.7 3.7 0 3.7 3.7 6.8 7.8 6.5 0 3.6 3.7 3.7 0 3.7 3.7 0 3.7 3.7 0 3.7 3.7 2.6 3.7 0 4.9 0.1 0.1 0.1 0 2.3 2.3 0
VOLTAGE 2.4 2.4 2.4 0
PIN NO. 5 6 7 8
VOLTAGE 3.2 3.2 4.9 0 0.1 2.4 2.4 2.2 0 2.7 0 2.1 5.0 0
PIN NO. 15 16 17 18 19 20 21 22 23 24 25 26 27 28
VOLTAGE 4.9 2.4 2.4 2.4
IC307 PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Q301 VOLTAGE 12.4 0 7.9
VOLTAGE 0.1 0 4.3 3.0 3.5 3.3 3.3 3.3 3.5 4.5 0 3.4 0.1 0.1
E(D) C(S) B(G) 4.8 4.8 4.1
CRT SOCKET PWB IC901 PIN NO. 1 2 3 4 5
VOLTAGE 9.1 0 5
No.51883
&
C(S) 7.8 12.6 0 3.3 3.4 4.8 3.2 4.8 3.2 4.8 0 0 --0 0 0 0 0 11.5
IC301
IC304
IC807 PIN NO. 1 2 3
E(D) 2.4 0 11.9 3.3 5.4 0 4.8 3.2 4.5 3.2 0 15.2 0 0.1 0 167 0 0 0
Q809 Cathode:11.3V Anode:0V Control terminal:2.4V
IC805
IC804 PIN NO. 1 2 3
VOLTAGE 0 12.7 0 0 -12.6
IC502
IC802 PIN NO. 1 2 3 4 5 6 7 8
VOLTAGE 45.2 7.7 0 7.5
IC501
IC801 PIN NO. 1 2 3
PIN NO. 6 7 8 9
IC100 PIN NO. 1 2 3 4 5
IC401 PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
VOLTAGE 2.3 2.3 15 7.5 0
Note) Although the symbol numbers of the level drive transistor and level output transistor are indicated as Q604 and Q606 on the wiring diagram, the numbers are indicated as Q601 and Q605 on the substrate, respectively. The following table shows the silk-printed symbol numbers on the substrate.
2-15
2-16
No.51883
VOLTAGE 3.2 2.9 3.2 0 6.0
PIN NO. 6 7 8 9
VOLTAGE 0.1 0.1 0.1 0.1
AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB
VICTOR COMPANY OF JAPAN, LIMITED HOME AV NETWORK BUSINESS UNIT. 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama, Kanagawa-prefecture, 221-8528, Japan
Printed in Japan VP 0201 DP2080
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