Telefone+toshiba+ft 8009
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FILE NO. 2B0-9901
SERVICE MANUAL
CORDLESS TELEPHONE
FT-8009
48
PUBLISHED IN JAPAN, Aug., 1999
CONTENTS SAFETY PRECAUTIONS ............................................................................................................ 1 OPERATING CONTROLS ........................................................................................................... 2 ALIGNMENT PROCEDURE ........................................................................................................ 3 BLOCK DIAGRAMS ..................................................................................................................... 7 SCHEMATIC DIAGRAMS ............................................................................................................ 9 TROUBLESHOOTING HINTS ................................................................................................... 13 IC AND TRANSISTOR VOLTAGE CHART ............................................................................... 20 SEMICONDUCTOR LEAD IDENTIFICATION ........................................................................... 24 ELECTRICAL PARTS LOCATION ............................................................................................. 26 WIRING DIAGRAMS ................................................................................................................. 28 EXPLODED VIEW AND MECHANICAL PARTS LIST............................................................... 30 PARTS LIST ............................................................................................................................... 34 ASSEMBLY PARTS LIST .......................................................................................................... 42 SPECIFICATIONS ..................................................................................................................... 43
SAFETY PRECAUTIONS Before returning any models to the customer, a safety check of the entire instrument should be made. The service technician must be sure that no protective device built into the instrument by the manufacture has become defective or inadvertently degraded during servicing.
1.WARNING: Alterations of the design or circuitry of these models should not be made. Any design changes or additions such as, but not limited to, circuit modifications, auxiliary speaker jacks, switches, grounding, active or passive circuitry, etc. may alter the safety characteristics of these models and potentially create a hazardous situation for the user. 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.
2.PRODUCT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special characteristics. These characteristics often pass unnoticed and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts that have these special safety characteristics are identified in this manual and its supplements; electrical components having such features are indentified by a in the schematic diagram and the parts list. Before replacing any of these components, read the parts list in this manual carefully. The use of substitute replacement parts that do not have the same safety characteristics as specified in the parts list may create shock, fire or other hazards.
1
OPERATING CONTROLS HANDSET CONTROLS AND FUNCTIONS Antenna
TALK/BATT.LOW LED REDIAL Button
FLASH Button
TALK Button
Dialpad
TONE Button
VOL/RING Button
MEM Button PAUSE Buttons
CH Button
One-touch dialing Button (MEM1 - MEM3)
MUTE Button
Rechargeable Battery Pack (back)
Charging Contacts
BASE UNIT CONTROLS AND FUNCTIONS DC in 9V Jack
T-P(TONE-PULSE) Switch
LINE Modular Jack
Antenna
IN USE/CHARGE LED PAGE Button Charging Contacts
2
ALIGNMENT PROCEDURE Base Unit Transmitter Section Connections
RF Test Point
Power Meter
BASE Unit J2 DC IN 9V Jack
RF Test Point
Frequency Counter
AF GEN.
J1 TEL Line 1kHz 77.5mV Jack
AC Adapter
Deviation Mater
AC 120V 60Hz
Preset a) Connect the base RF unit to the base main unit. b) Set the “TONE / PULSE” switch to PULSE. c) Connect the AC adapter to the base unit while pressing the “PAGE” key, and keep pressing it continuously for approximate 2 sectonds. d) Release the “PAGE” key when entering TEST mode 1 with IN USE LED lighting. Alignment Procedure step 1 2
3
Adjustment
Remarks
RT301 (TX Power) CT1 (TX Frequency)
Connect the Power Meter to the RF test point on the Base MAIN PCB. Adjust RT301 for a -5.0dBm reading on the Power Meter. Connect the Frequency Counter to the RF test point on the Base MAIN PCB. Adjust CT1 to make sure that the frequency is 926.897468 MHz. Press the “PAGE” key to enter the TEST Mode 2. Connect the AF Generator to the TEL Line Jack on the Base Main PCB. Make sure that the output is 1 kHz 77.5 mV from the AF Generator. Connect the Deviation Meter to the RF test point on the Base MAIN PCB. Adjust RT3 to indicate ±8 kHz Dev.
RT3 (TX Modulation)
Alignment Point Location on Base Main PCB and Base RF PCB Base Main PCB
J1 TEL LINE Jack
Base RF PCB
RT3
RT301 CT1
RF Test Point
3
J2 DC IN 9V Jack T S2 T/P Switch P
Receiver Section Connections BASE Unit
RF SG -
J1 TEL Line Jack
RF Test Point
+ J2 DC IN 9V Jack AC 120V 60Hz
AC Voltmeter Dummy Load (600-ohm) +
AF Terminal
DC Voltmeter
AC Adapter
Preset a) Connect the base RF unit to the base main unit. b) Set the “TONE/PULSE” switch to PULSE. c) Connect the AC adapter to the base unit while pressing the “PAGE” key, and keep pressing it continuously for approximate 2 seconds. d) Release the “PAGE” key when entering TEST mode 1 with IN USE LED lighting.
Alignment Procedure step
1
2
3
Preset to
Adjustment
Remarks
Press the “PAGE” key for 3 times to enter the TEST Mode 4. Connect the RF Signal Generator to the RF test point on the Base MAIN PCB. Make L3 SG: 1mV (Discriminator sure that the frequency is 902.952467 MHz. No modulation Voltage) Connect the DC Voltmeter to the AF test point. Adjust L3 to indicate DC 1.00 V. SG: 1mV RT2 Connect the AC Voltmeter across a 600-ohm dummy to the Telephone Line 1 kHz ±8kHz (RX AF Jack. Adjust RT2 for a 220 mV reading on the AC voltmeter. deviation Voltage) Press the “PAGE” key to enter the TEST Mode 5. Make sure that the SG: -6.0 dBµ µV RT1 frequency of RF SG output is 902.952467 MHz. Adjust RT1 to turn to the 1kHz ±8kHz (SQ Point) point where the CHG LED just turns on. Deviation
Alignment Point Location on Base Main PCB and Base RF PCB Base Main PCB
J1 TEL LINE Jack J2 DC IN 9V Jack T S2 T/P Switch P
RT2 RT1
L3
AF Test Point
RF Test Point
4
Handset Unit Transmitter Section Connection Power Meter
Frequency Counter
RF Test Point
RF Test Point
HANDSET Unit J603 Battery Connector
AF GEN.
MIC+Pin
1kHz 9mV
DC Power Supply
Deviation Mater
DC 3.8V
Preset a) Connect the handseet RF unit to the handset main unit. b) Connect DC power supply to battery connector on the handset unit. c) Turn the DC power supply On while pressing " " and " # " keys, and keep pressing the keys continuously for approximate 2 seconds. d) Release keys when entering TEST mode 1 with TALK LED lighting and beep.
Alignment Procedure step 1 2
3
Adjustment
Remarks
RT501 (TX Power) CT401 (TX Frequency)
Connect the RF power Meter to the RF test point on the handset MAIN PCB. Adjust RT501 for a -7.5dBm reading on the Power Meter. Connect the Frequency Counter to the RF test point on the handset MAIN PCB. Adjust CT401 to make sure that the frequency is 903.052467 MHz. Press the “2” key to enter the TEST Mode 2. Connect the AF Generator to the MIC Connector. Make sure that the output is 1kHz 9mV from the AF Generator. Connect the Deviation Meter to the RF test point on the handset MAIN PCB. Adjust RT403 to indicate ±8 kHz Dev.
RT403 (TX Modulation)
Alignment Point Location on Handset Main PCB and Handset RF PCB RF Test Point
Handset PCB J401
RF PCB
RT403
RT501 CT401
MC601
5
Receiver Section Connections HANDSET Unit
RF SG + DC Power Supply
AC Voltmeter
J602 RF SP Test Point Connector
J603 Battery Connector
Dummy Load (150-ohm) + DC Voltmeter
AF Terminal
DC 3.8V
Preset a) Connect the handset RF unit to the handset main unit. b) Connect DC power supply to battery connector on the handset unit. c) Turn the DC power supply ON while pressing “ ” and “ # ” keys, and keep pressing the keys continuously for approximate 2 seconds. d) Release keys when entering TEST mode 1 with TALK LED lighting and beep.
Alignment Procedure step
1
2
3
Preset to
Adjustment
Remarks
Press the “4” key to enter the TEST Mode 4. Connect the RF Singal Generator to the RF test point on the handset MAIN PCB. Make sure that L402 SG: 1mV (Discriminator the frequency is 926.997467 MHz. No modulation Voltage) Connect the DC Voltmeter to the AF test point. Adjust L402 to indicate DC 1.00 V. Connect the RF Signal Generator to the RF test point on the handset MAIN SG: 1mV RT402 PCB. Make sure that the frequency is 926.997467 MHz. 1 kHz ±8kHz (RX AF Connect the AC Voltmeter across a 150-ohm dummy to the SP Connector. deviation Voltage) Adjust RT402 for a 102 mV reading on the AC Voltmeter. SG: -6.0 dBµ Press the “5” key to enter the TEST Mode 5. Make sure that the frequency µV RT401 1kHz ±8kHz of RF SG output is 926.997467 MHz. Adjust RT401 to turn to the point (SQ Point) Deviation where the indication is just vibrated.
Alignment Point Location on Handset Main PCB and Handset RF PCB RF Test Point
Handset PCB L402
J401 RT402 RT401
AF Test Point
6
RF PCB
BLOCK DIAGRAMS Base Unit
7
Handset
8
SCHEMATIC DIAGRAMS Base Unit
9
10
Handset
11
12
TROUBLESHOOTING HINTS 1. The bell does not ring. When the PAGE SW of the base is pressed, does the ringer on the handset ring?
NG
See 2. The bell does not ring & page does not ring.
NG
Check IC4 and TEL network circuit.
OK
When the TEL SG is joined with the base to make bell signal, is there pulse wave at pin 4 of IC4? OK
Is there pulse wave at pin 21 of IC5?
NG
Check R58, C45 and R59.
OK
Check IC5 and its peripheral circuit.
13
2. The bell does not ring & page does not ring. Can the base and handset be connected?
NG
See 3. The base and handset cannot be connected.
NG
When the key of the handset is NG pressed, can the pulse output at pin 38 of IC404 be seen?
OK
Press handset DIAL key while in TALK MODE. Can key touch sound be heard from the ringer?
Check IC404.
OK
OK
At the Q408 collector, can the NG pulse wave be seen? OK
Check RINGER Y401.
When the PAGE SW of the NG base is pressed, does pin20 of IC5 change from high to low?
Check R55, R77 and S1.
OK
Check IC5 and its peripheral circuit.
14
Check R454, R457 and D402.
3. The base and handset cannot be connected. Check whether the base NG is able to set in the test mode 1.
Check IC5 and its peripheral circuit.
OK Check the TX POWER NG and the TX FREQUENCY on the base unit.
Check base RF unit.
OK Set the base in the test NG mode 3, check whether deviation of the TX data is app. 8 kHz Dev.
Check whether there is a NG 250 Hz data waveform at “MOD” of RF unit.
Check RT3, R40, R68, R69, R53, R70 and C79.
OK
OK Check base RF unit.
Set the base in the test NG mode 8, 902.952467 MHz (250 Hz ±8 kHz Dev.) 1mV output signal from RF jack is applied. Can the status LED be lighted?
Check whether there is a NG 250 Hz data waveform at pin 9 of IC3.
OK
Check whether there is a NG 250 Hz data waveform at the Q2 collector.
Check IC3, Q1 and their NG peripheral circuit. OK
OK
Check RT2, Q2 and their peripheral circuit.
OK Check whether there is a NG 250 Hz data waveform at pin 38 of IC5. OK Check IC5 and its peripheral circuit.
Check whether the NG handset is able to set in the test mode 1.
Check IC404 and its peripheral circuit.
OK Check the TX POWER NG and the TX FREQUENCY on the handset unit.
Check handset RF unit.
OK A
15
Check R42, R46, IC1 and their peripheral circuit.
Check base RF unit.
A
Set the handset in the NG test mode 3, check whether deviation of the TX data is app. 8 kHz Dev.
Check whether there is a NG 250 Hz data waveform at “MOD” of RF unit.
Check RT403, R441, R442, R443, R444, R445 and C453.
OK Check handset RF unit.
OK Set the handset in the NG test mode 6, 926.997467 MHz (250 Hz ±8 kHz Dev.) 1mV output signal from RF jack is applied. Check whether the bell ring.
Check whether the 250 NG Hz data waveform from pin 9 of IC401 is fed.
OK
Check whether there is a NG 250 Hz data waveform at the Q402 collector.
Place the handset on the base to charge about 5 seconds, then connect again.
Check IC401, Q401 and NG their peripheral circuit. OK
OK
Check RT402, Q402 and their peripheral circuit.
OK Check whether there is a NG 250 Hz data waveform at pin 40 of IC404. OK Check IC404 and its peripheral circuit.
16
Check R428, R429, IC403 and their peripheral circuit.
Check handset RF unit.
4. Cannot make a phone call (pulse). Can the base and handset be connected?
NG
See 3. The base and handset cannot be connected.
OK While in TALK MODE, press NG dial key of the handset. Check whether square waveform from pin 13 of IC5 is fed.
Check IC5.
OK Check Q10, RL1 and their peripheral circuits.
5. Cannot make a phone call (tone). Can the base and handset be connected?
NG
See 3. The base and handset be cannot be connected.
OK While in TALK MODE, press dial key of the handset. Can tone waveform from Pin 1 of IC5 is fed?
NG
Check IC5.
OK Can tone signal be heard from the handset speaker?
NG
Check IC1, Q3 and their peripheral circuits.
OK Check the base TEL-line circuit and RELAY control circuit.
17
6. Voice cannot be transmitted to other party (outgoing call). Can the base and handset be connected?
NG
See 3. The base and handset cannot be connected.
NG
Check Q404 and its peripheral circuit.
NG
Check IC403 and its peripheral circuit.
NG
Check RT403 and its peripheral circuit.
OK The 1 kHz, 9.0mV sine wavefor m i s a p p l i e d t o MC401 + side, can the 1 kHz sine waveform from pin 24 of IC403 be fed? OK Check whether there is the 1 kHz sine wavefor m at pin 20 of IC403. OK Check whether there is the 1 kHz sine wavefor m at pin 23 of IC403. OK TX output signal from the handset is detected by the liner detector, can the 1 kHz sine waveform be fed?
NG
Check handset RF unit.
OK Check whether there is the 1 kHz sine waveform at pin 9 of IC3 on the base unit.
NG
Check IC3, Q1 and their peripheral circuit. OK
OK Check whether there is the 1 kHz sine waveform at pin 3 of IC1.
NG
Check RT2, Q2 and their peripheral circuits.
NG
Check IC1 and its peripheral circuit.
NG
Check Q3 and its peripheral circuit.
NG
Check T1, RL1 and their peripheral circuits.
OK Check whether there is the 1 kHz sine wavefor m at pin 18 of IC1. OK Check whether there is the 1 kHz sine waveform at the Q3 collector. OK Check whether the 1 kHz sine wavefor m from TEL-line output is fed. OK Check MC401 of handset.
18
NG
Check base RF unit.
7. The voice of the caller cannot be heard (incoming call). Can the base and handset be connected?
NG
See 3. The base and handset cannot be connected.
OK The 1 kHz, 77.5mV sine waveform is applied to TELline of the base, can the 1 kHz sine waveform from the Q3 collector be fed?
NG
Check the base TEL-line circuit and REPLAY control circuit.
OK Check whether there is the 1 kHz sine wavefor m at pin 24 of IC1.
NG
Check Q4 and its peripheral circuit.
NG
Check IC1 and its peripheral circuit.
NG
Check RT3 and its peripheral circuit.
OK Check whether there is the 1 kHz sine wavefor m at pin 20 of IC1. OK Check whether there is the 1 kHz sine wavefor m at “MOD” RF unit. OK TX output signal from the base is detected by the liner detector, can the 1 kHz sine waveform be fed?
NG
Check base RF unit.
OK Check whether there is the 1 kHz sine waveform at pin 9 of IC401 on the handset unit.
NG
Check IC401, Q401 and their peripheral circuit. OK
OK Check whether there is the 1 kHz sine waveform at pin 3 of IC403.
NG
Check RT402, Q402 and their peripheral circuits.
NG
Check IC403 and its peripheral circuit.
NG
Check Q405, Q406 and its peripheral circuit.
OK Check whether there is the 1 kHz sine waveform at the pin 18 of IC403. OK Check whether there is the 1 kHz sine waveform at pin 1, 2 of SP801. OK Check SP801 and W801, W802.
19
NG
Check handset RF unit.
IC AND TRANSISTOR VOLTAGE CHART Base Unit Ref. No. PIN 1 2 3 4 5 6 7 8 9 10 11 IC1 12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 IC3 8 9 10 11 12 13 14 15 16 1 2 IC4 3 4
Unit[V] STBY 2.0 2.0 1.7 0.7 1.7 1.7 2.0 3.2 0.0 0-3.2 0.0 1.7 3.3 1.7 1.7 0.0 0.0 1.7 1.7 1.7 0.6 1.7 1.7 1.7 3.2 2.8 2.7 3.3 2.8 2.8 2.8 3.3 1.0 0.6 0.7 0.6 1.8 0.0 0.0 3.3 0.0 0.0 0.0 3.2
TALK 2.0 2.0 1.6 0.6 1.6 1.6 1.9 3.1 0.0 0-3.2 0.0 1.6 3.2 1.6 1.6 3.1 3.1 1.6 1.6 1.6 0.7 1.6 1.6 1.6 3.1 2.7 2.7 3.2 2.7 2.7 2.7 3.2 1.0 0.6 0.7 0.8 0.0 0.0 0.0 3.2 0.0 0.0 0.0 3.1
Unit[V] Ref. No. PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 IC5 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
NOTE
OPEN
OPEN GND GND
OPEN
OPEN GND
GND
20
STBY 0.0 3.2 0.0 0.0 1.2(AC) 1.8(AC) 3.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.4 0.0 3.4 3.4 3.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.2 2.2 0.0 2.9 3.4 3.4 0.0 0-3.2 3.2 0-3.2 0-3.2 0-3.2 0.0 0.0
TALK 0.0 3.1 0.0 0.0 1.2(AC) 1.8(AC) 3.1 0.0 0.0 0.0 0.0 0.0 2.8 0.0 0.0 0.0 0.0 3.4 0.0 3.1 3.1 3.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.2 0.0 2.8 3.1 3.1 3.4 0-3.2 0.0 0.0 3.1 3.1 0.0 0.0
NOTE
GND GND
GND OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN GND
OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN
OPEN
GND OPEN
Unit[V] Ref. No. PIN 45 46 IC5 47 48 1 IC6 2 3 E Q1 C B E Q2 C B E Q3 C B E Q4 C B E Q6 C B E Q7 C B E Q8 C B E Q9 C B E Q10 C B E Q11 C B E Q12 C B
STBY 0.0 3.0 0.6 0.0 3.4 3.4 0.0 0.0 1.7 0.7 0.2 2.0 0.8 1.1 4.8 1.7 0.5 1.6 1.1 0.0 3.3 0.0 6.1 9.0 6.8 0.0 0.0 0.7 0.0 3.2 0.0 0.0 6.2 0.0 3.3 6.1 4.0 3.3 0.0 2.7
TALK 0.0 0.2 0.6 0.0 3.1 3.1 0.0 0.0 1.6 0.7 0.1 2.0 0.8 1.1 4.8 1.7 0.5 1.6 1.1 0.0 3.1 0.0 6.1 9.0 6.8 0.0 0.0 0.7 0.0 3.1 0.0 0.0 0.0 0.7 3.2 6.1 3.8 3.2 3.1 2.4
NOTE OPEN
GND GND
GND
GND
GND
21
Handset Ref. No. PIN 1 2 3 4 5 6 7 IC401 8 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 11 IC403 12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 IC404 3 4
Unit[V] STBY 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0-2.0 0-2.0 0-1.5 0-0.4 0-0.4 0-0.4 0-1.8 0.0 0.0 0-3.0 0.0 0-1.0 0-3.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0-0.3 0.0 0.0 0.0 0.0 3.5 0.0 0.0
TALK 2.9 2.5 2.5 3.0 2.6 2.6 2.6 3.0 0.9 0.6 0.7 0.8 0.0 0.0 0.0 3.0 1.9 1.9 1.5 0.6 1.5 1.5 1.8 3.4 0.0 1.6 0.0 1.5 3.0 1.5 1.5 3.4 3.4 1.5 1.5 1.5 0.6 1.5 1.5 1.5 0.0 3.4 0.0 0.0
Unit[V]
NOTE
Ref. No. PIN 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 IC404 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
OPEN GND
GND GND
OPEN
OPEN GND GND
22
STBY 0.0 0-3.5 3.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0-3.0 1.0-3.0 0 3.8 3.5 3.5 3.5 3.5 3.5 3.8 3.8 0.0 0.0 0.0 0-3.0 0 0-2.4 0.0 0-0.8 0.0 0-3.0 0-3.0 0-3.0
TALK 2.0(AC) 2.0(AC) 3.4 0.0 0.0 0.0 3.4 3.4 3.4 3.4 0.0 0-0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.4 3.4 0 3.8 3.4 3.4 3.4 3.4 3.4 3.8 3.8 3.3 0.0 0.0 0-3.0 0.0 0.2 0.0 0.8 0.0 0.0 3.0 3.0
NOTE
GND OPEN OPEN
OPEN OPEN GND OPEN
OPEN
GND
Unit[V] Ref. No. PIN 1 2 IC405 3 4 5 1 2 IC406 3 4 5 E Q401 C B E Q402 C B E Q403 C B E Q404 C B E Q405 C B E Q406 C B E Q407 C B E Q408 C B E Q409 C B E Q410 C B E Q411 C B
STBY 0.0 0.0 0-1.2 0-3.0 3.8 3.8 3.8 0.0 3.8 3.8 0.0 0-2.0 0-0.8 0.0 0-2.0 0-0.8 0-3.0 0.0 0-2.4 0.0 0.0 0.0 0.0 3.8 0.0 0.0 3.8 0.0 0.0 0.0 0.0 0.0 3.8 0.0 0.0 0.0 0.0 0.0 3.8 0.0 0.0 3.5 0.0
TALK 3.4 0.0 1.2 3.0 3.8 3.8 3.8 0.0 3.8 3.8 0.0 1.7 0.7 0.0 1.9 0.7 3.0 2.9 2.2 0.4 1.9 1.0 0.5 2.6 1.2 0.5 2.5 1.2 0.0 0.0 0.0 0.0 3.8 0.0 0.0 0.0 0.0 0.0 3.8 0.0 0.0 3.4 0.0
Unit[V]
NOTE
Ref. No. PIN E Q412 C B
GND
GND
GND
GND
GND
GND
GND
23
STBY 0.0 0-0.5 0-0.5
TALK 3.3 1.5 1.5
NOTE
SERVICE MANUAL
CORDLESS TELEPHONE
FT-8009
48
PUBLISHED IN JAPAN, Aug., 1999
CONTENTS SAFETY PRECAUTIONS ............................................................................................................ 1 OPERATING CONTROLS ........................................................................................................... 2 ALIGNMENT PROCEDURE ........................................................................................................ 3 BLOCK DIAGRAMS ..................................................................................................................... 7 SCHEMATIC DIAGRAMS ............................................................................................................ 9 TROUBLESHOOTING HINTS ................................................................................................... 13 IC AND TRANSISTOR VOLTAGE CHART ............................................................................... 20 SEMICONDUCTOR LEAD IDENTIFICATION ........................................................................... 24 ELECTRICAL PARTS LOCATION ............................................................................................. 26 WIRING DIAGRAMS ................................................................................................................. 28 EXPLODED VIEW AND MECHANICAL PARTS LIST............................................................... 30 PARTS LIST ............................................................................................................................... 34 ASSEMBLY PARTS LIST .......................................................................................................... 42 SPECIFICATIONS ..................................................................................................................... 43
SAFETY PRECAUTIONS Before returning any models to the customer, a safety check of the entire instrument should be made. The service technician must be sure that no protective device built into the instrument by the manufacture has become defective or inadvertently degraded during servicing.
1.WARNING: Alterations of the design or circuitry of these models should not be made. Any design changes or additions such as, but not limited to, circuit modifications, auxiliary speaker jacks, switches, grounding, active or passive circuitry, etc. may alter the safety characteristics of these models and potentially create a hazardous situation for the user. 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.
2.PRODUCT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special characteristics. These characteristics often pass unnoticed and the protection afforded by them cannot necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts that have these special safety characteristics are identified in this manual and its supplements; electrical components having such features are indentified by a in the schematic diagram and the parts list. Before replacing any of these components, read the parts list in this manual carefully. The use of substitute replacement parts that do not have the same safety characteristics as specified in the parts list may create shock, fire or other hazards.
1
OPERATING CONTROLS HANDSET CONTROLS AND FUNCTIONS Antenna
TALK/BATT.LOW LED REDIAL Button
FLASH Button
TALK Button
Dialpad
TONE Button
VOL/RING Button
MEM Button PAUSE Buttons
CH Button
One-touch dialing Button (MEM1 - MEM3)
MUTE Button
Rechargeable Battery Pack (back)
Charging Contacts
BASE UNIT CONTROLS AND FUNCTIONS DC in 9V Jack
T-P(TONE-PULSE) Switch
LINE Modular Jack
Antenna
IN USE/CHARGE LED PAGE Button Charging Contacts
2
ALIGNMENT PROCEDURE Base Unit Transmitter Section Connections
RF Test Point
Power Meter
BASE Unit J2 DC IN 9V Jack
RF Test Point
Frequency Counter
AF GEN.
J1 TEL Line 1kHz 77.5mV Jack
AC Adapter
Deviation Mater
AC 120V 60Hz
Preset a) Connect the base RF unit to the base main unit. b) Set the “TONE / PULSE” switch to PULSE. c) Connect the AC adapter to the base unit while pressing the “PAGE” key, and keep pressing it continuously for approximate 2 sectonds. d) Release the “PAGE” key when entering TEST mode 1 with IN USE LED lighting. Alignment Procedure step 1 2
3
Adjustment
Remarks
RT301 (TX Power) CT1 (TX Frequency)
Connect the Power Meter to the RF test point on the Base MAIN PCB. Adjust RT301 for a -5.0dBm reading on the Power Meter. Connect the Frequency Counter to the RF test point on the Base MAIN PCB. Adjust CT1 to make sure that the frequency is 926.897468 MHz. Press the “PAGE” key to enter the TEST Mode 2. Connect the AF Generator to the TEL Line Jack on the Base Main PCB. Make sure that the output is 1 kHz 77.5 mV from the AF Generator. Connect the Deviation Meter to the RF test point on the Base MAIN PCB. Adjust RT3 to indicate ±8 kHz Dev.
RT3 (TX Modulation)
Alignment Point Location on Base Main PCB and Base RF PCB Base Main PCB
J1 TEL LINE Jack
Base RF PCB
RT3
RT301 CT1
RF Test Point
3
J2 DC IN 9V Jack T S2 T/P Switch P
Receiver Section Connections BASE Unit
RF SG -
J1 TEL Line Jack
RF Test Point
+ J2 DC IN 9V Jack AC 120V 60Hz
AC Voltmeter Dummy Load (600-ohm) +
AF Terminal
DC Voltmeter
AC Adapter
Preset a) Connect the base RF unit to the base main unit. b) Set the “TONE/PULSE” switch to PULSE. c) Connect the AC adapter to the base unit while pressing the “PAGE” key, and keep pressing it continuously for approximate 2 seconds. d) Release the “PAGE” key when entering TEST mode 1 with IN USE LED lighting.
Alignment Procedure step
1
2
3
Preset to
Adjustment
Remarks
Press the “PAGE” key for 3 times to enter the TEST Mode 4. Connect the RF Signal Generator to the RF test point on the Base MAIN PCB. Make L3 SG: 1mV (Discriminator sure that the frequency is 902.952467 MHz. No modulation Voltage) Connect the DC Voltmeter to the AF test point. Adjust L3 to indicate DC 1.00 V. SG: 1mV RT2 Connect the AC Voltmeter across a 600-ohm dummy to the Telephone Line 1 kHz ±8kHz (RX AF Jack. Adjust RT2 for a 220 mV reading on the AC voltmeter. deviation Voltage) Press the “PAGE” key to enter the TEST Mode 5. Make sure that the SG: -6.0 dBµ µV RT1 frequency of RF SG output is 902.952467 MHz. Adjust RT1 to turn to the 1kHz ±8kHz (SQ Point) point where the CHG LED just turns on. Deviation
Alignment Point Location on Base Main PCB and Base RF PCB Base Main PCB
J1 TEL LINE Jack J2 DC IN 9V Jack T S2 T/P Switch P
RT2 RT1
L3
AF Test Point
RF Test Point
4
Handset Unit Transmitter Section Connection Power Meter
Frequency Counter
RF Test Point
RF Test Point
HANDSET Unit J603 Battery Connector
AF GEN.
MIC+Pin
1kHz 9mV
DC Power Supply
Deviation Mater
DC 3.8V
Preset a) Connect the handseet RF unit to the handset main unit. b) Connect DC power supply to battery connector on the handset unit. c) Turn the DC power supply On while pressing " " and " # " keys, and keep pressing the keys continuously for approximate 2 seconds. d) Release keys when entering TEST mode 1 with TALK LED lighting and beep.
Alignment Procedure step 1 2
3
Adjustment
Remarks
RT501 (TX Power) CT401 (TX Frequency)
Connect the RF power Meter to the RF test point on the handset MAIN PCB. Adjust RT501 for a -7.5dBm reading on the Power Meter. Connect the Frequency Counter to the RF test point on the handset MAIN PCB. Adjust CT401 to make sure that the frequency is 903.052467 MHz. Press the “2” key to enter the TEST Mode 2. Connect the AF Generator to the MIC Connector. Make sure that the output is 1kHz 9mV from the AF Generator. Connect the Deviation Meter to the RF test point on the handset MAIN PCB. Adjust RT403 to indicate ±8 kHz Dev.
RT403 (TX Modulation)
Alignment Point Location on Handset Main PCB and Handset RF PCB RF Test Point
Handset PCB J401
RF PCB
RT403
RT501 CT401
MC601
5
Receiver Section Connections HANDSET Unit
RF SG + DC Power Supply
AC Voltmeter
J602 RF SP Test Point Connector
J603 Battery Connector
Dummy Load (150-ohm) + DC Voltmeter
AF Terminal
DC 3.8V
Preset a) Connect the handset RF unit to the handset main unit. b) Connect DC power supply to battery connector on the handset unit. c) Turn the DC power supply ON while pressing “ ” and “ # ” keys, and keep pressing the keys continuously for approximate 2 seconds. d) Release keys when entering TEST mode 1 with TALK LED lighting and beep.
Alignment Procedure step
1
2
3
Preset to
Adjustment
Remarks
Press the “4” key to enter the TEST Mode 4. Connect the RF Singal Generator to the RF test point on the handset MAIN PCB. Make sure that L402 SG: 1mV (Discriminator the frequency is 926.997467 MHz. No modulation Voltage) Connect the DC Voltmeter to the AF test point. Adjust L402 to indicate DC 1.00 V. Connect the RF Signal Generator to the RF test point on the handset MAIN SG: 1mV RT402 PCB. Make sure that the frequency is 926.997467 MHz. 1 kHz ±8kHz (RX AF Connect the AC Voltmeter across a 150-ohm dummy to the SP Connector. deviation Voltage) Adjust RT402 for a 102 mV reading on the AC Voltmeter. SG: -6.0 dBµ Press the “5” key to enter the TEST Mode 5. Make sure that the frequency µV RT401 1kHz ±8kHz of RF SG output is 926.997467 MHz. Adjust RT401 to turn to the point (SQ Point) Deviation where the indication is just vibrated.
Alignment Point Location on Handset Main PCB and Handset RF PCB RF Test Point
Handset PCB L402
J401 RT402 RT401
AF Test Point
6
RF PCB
BLOCK DIAGRAMS Base Unit
7
Handset
8
SCHEMATIC DIAGRAMS Base Unit
9
10
Handset
11
12
TROUBLESHOOTING HINTS 1. The bell does not ring. When the PAGE SW of the base is pressed, does the ringer on the handset ring?
NG
See 2. The bell does not ring & page does not ring.
NG
Check IC4 and TEL network circuit.
OK
When the TEL SG is joined with the base to make bell signal, is there pulse wave at pin 4 of IC4? OK
Is there pulse wave at pin 21 of IC5?
NG
Check R58, C45 and R59.
OK
Check IC5 and its peripheral circuit.
13
2. The bell does not ring & page does not ring. Can the base and handset be connected?
NG
See 3. The base and handset cannot be connected.
NG
When the key of the handset is NG pressed, can the pulse output at pin 38 of IC404 be seen?
OK
Press handset DIAL key while in TALK MODE. Can key touch sound be heard from the ringer?
Check IC404.
OK
OK
At the Q408 collector, can the NG pulse wave be seen? OK
Check RINGER Y401.
When the PAGE SW of the NG base is pressed, does pin20 of IC5 change from high to low?
Check R55, R77 and S1.
OK
Check IC5 and its peripheral circuit.
14
Check R454, R457 and D402.
3. The base and handset cannot be connected. Check whether the base NG is able to set in the test mode 1.
Check IC5 and its peripheral circuit.
OK Check the TX POWER NG and the TX FREQUENCY on the base unit.
Check base RF unit.
OK Set the base in the test NG mode 3, check whether deviation of the TX data is app. 8 kHz Dev.
Check whether there is a NG 250 Hz data waveform at “MOD” of RF unit.
Check RT3, R40, R68, R69, R53, R70 and C79.
OK
OK Check base RF unit.
Set the base in the test NG mode 8, 902.952467 MHz (250 Hz ±8 kHz Dev.) 1mV output signal from RF jack is applied. Can the status LED be lighted?
Check whether there is a NG 250 Hz data waveform at pin 9 of IC3.
OK
Check whether there is a NG 250 Hz data waveform at the Q2 collector.
Check IC3, Q1 and their NG peripheral circuit. OK
OK
Check RT2, Q2 and their peripheral circuit.
OK Check whether there is a NG 250 Hz data waveform at pin 38 of IC5. OK Check IC5 and its peripheral circuit.
Check whether the NG handset is able to set in the test mode 1.
Check IC404 and its peripheral circuit.
OK Check the TX POWER NG and the TX FREQUENCY on the handset unit.
Check handset RF unit.
OK A
15
Check R42, R46, IC1 and their peripheral circuit.
Check base RF unit.
A
Set the handset in the NG test mode 3, check whether deviation of the TX data is app. 8 kHz Dev.
Check whether there is a NG 250 Hz data waveform at “MOD” of RF unit.
Check RT403, R441, R442, R443, R444, R445 and C453.
OK Check handset RF unit.
OK Set the handset in the NG test mode 6, 926.997467 MHz (250 Hz ±8 kHz Dev.) 1mV output signal from RF jack is applied. Check whether the bell ring.
Check whether the 250 NG Hz data waveform from pin 9 of IC401 is fed.
OK
Check whether there is a NG 250 Hz data waveform at the Q402 collector.
Place the handset on the base to charge about 5 seconds, then connect again.
Check IC401, Q401 and NG their peripheral circuit. OK
OK
Check RT402, Q402 and their peripheral circuit.
OK Check whether there is a NG 250 Hz data waveform at pin 40 of IC404. OK Check IC404 and its peripheral circuit.
16
Check R428, R429, IC403 and their peripheral circuit.
Check handset RF unit.
4. Cannot make a phone call (pulse). Can the base and handset be connected?
NG
See 3. The base and handset cannot be connected.
OK While in TALK MODE, press NG dial key of the handset. Check whether square waveform from pin 13 of IC5 is fed.
Check IC5.
OK Check Q10, RL1 and their peripheral circuits.
5. Cannot make a phone call (tone). Can the base and handset be connected?
NG
See 3. The base and handset be cannot be connected.
OK While in TALK MODE, press dial key of the handset. Can tone waveform from Pin 1 of IC5 is fed?
NG
Check IC5.
OK Can tone signal be heard from the handset speaker?
NG
Check IC1, Q3 and their peripheral circuits.
OK Check the base TEL-line circuit and RELAY control circuit.
17
6. Voice cannot be transmitted to other party (outgoing call). Can the base and handset be connected?
NG
See 3. The base and handset cannot be connected.
NG
Check Q404 and its peripheral circuit.
NG
Check IC403 and its peripheral circuit.
NG
Check RT403 and its peripheral circuit.
OK The 1 kHz, 9.0mV sine wavefor m i s a p p l i e d t o MC401 + side, can the 1 kHz sine waveform from pin 24 of IC403 be fed? OK Check whether there is the 1 kHz sine wavefor m at pin 20 of IC403. OK Check whether there is the 1 kHz sine wavefor m at pin 23 of IC403. OK TX output signal from the handset is detected by the liner detector, can the 1 kHz sine waveform be fed?
NG
Check handset RF unit.
OK Check whether there is the 1 kHz sine waveform at pin 9 of IC3 on the base unit.
NG
Check IC3, Q1 and their peripheral circuit. OK
OK Check whether there is the 1 kHz sine waveform at pin 3 of IC1.
NG
Check RT2, Q2 and their peripheral circuits.
NG
Check IC1 and its peripheral circuit.
NG
Check Q3 and its peripheral circuit.
NG
Check T1, RL1 and their peripheral circuits.
OK Check whether there is the 1 kHz sine wavefor m at pin 18 of IC1. OK Check whether there is the 1 kHz sine waveform at the Q3 collector. OK Check whether the 1 kHz sine wavefor m from TEL-line output is fed. OK Check MC401 of handset.
18
NG
Check base RF unit.
7. The voice of the caller cannot be heard (incoming call). Can the base and handset be connected?
NG
See 3. The base and handset cannot be connected.
OK The 1 kHz, 77.5mV sine waveform is applied to TELline of the base, can the 1 kHz sine waveform from the Q3 collector be fed?
NG
Check the base TEL-line circuit and REPLAY control circuit.
OK Check whether there is the 1 kHz sine wavefor m at pin 24 of IC1.
NG
Check Q4 and its peripheral circuit.
NG
Check IC1 and its peripheral circuit.
NG
Check RT3 and its peripheral circuit.
OK Check whether there is the 1 kHz sine wavefor m at pin 20 of IC1. OK Check whether there is the 1 kHz sine wavefor m at “MOD” RF unit. OK TX output signal from the base is detected by the liner detector, can the 1 kHz sine waveform be fed?
NG
Check base RF unit.
OK Check whether there is the 1 kHz sine waveform at pin 9 of IC401 on the handset unit.
NG
Check IC401, Q401 and their peripheral circuit. OK
OK Check whether there is the 1 kHz sine waveform at pin 3 of IC403.
NG
Check RT402, Q402 and their peripheral circuits.
NG
Check IC403 and its peripheral circuit.
NG
Check Q405, Q406 and its peripheral circuit.
OK Check whether there is the 1 kHz sine waveform at the pin 18 of IC403. OK Check whether there is the 1 kHz sine waveform at pin 1, 2 of SP801. OK Check SP801 and W801, W802.
19
NG
Check handset RF unit.
IC AND TRANSISTOR VOLTAGE CHART Base Unit Ref. No. PIN 1 2 3 4 5 6 7 8 9 10 11 IC1 12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 IC3 8 9 10 11 12 13 14 15 16 1 2 IC4 3 4
Unit[V] STBY 2.0 2.0 1.7 0.7 1.7 1.7 2.0 3.2 0.0 0-3.2 0.0 1.7 3.3 1.7 1.7 0.0 0.0 1.7 1.7 1.7 0.6 1.7 1.7 1.7 3.2 2.8 2.7 3.3 2.8 2.8 2.8 3.3 1.0 0.6 0.7 0.6 1.8 0.0 0.0 3.3 0.0 0.0 0.0 3.2
TALK 2.0 2.0 1.6 0.6 1.6 1.6 1.9 3.1 0.0 0-3.2 0.0 1.6 3.2 1.6 1.6 3.1 3.1 1.6 1.6 1.6 0.7 1.6 1.6 1.6 3.1 2.7 2.7 3.2 2.7 2.7 2.7 3.2 1.0 0.6 0.7 0.8 0.0 0.0 0.0 3.2 0.0 0.0 0.0 3.1
Unit[V] Ref. No. PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 IC5 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
NOTE
OPEN
OPEN GND GND
OPEN
OPEN GND
GND
20
STBY 0.0 3.2 0.0 0.0 1.2(AC) 1.8(AC) 3.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.4 0.0 3.4 3.4 3.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.2 2.2 0.0 2.9 3.4 3.4 0.0 0-3.2 3.2 0-3.2 0-3.2 0-3.2 0.0 0.0
TALK 0.0 3.1 0.0 0.0 1.2(AC) 1.8(AC) 3.1 0.0 0.0 0.0 0.0 0.0 2.8 0.0 0.0 0.0 0.0 3.4 0.0 3.1 3.1 3.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.2 0.0 2.8 3.1 3.1 3.4 0-3.2 0.0 0.0 3.1 3.1 0.0 0.0
NOTE
GND GND
GND OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN GND
OPEN OPEN OPEN OPEN OPEN OPEN OPEN OPEN
OPEN
GND OPEN
Unit[V] Ref. No. PIN 45 46 IC5 47 48 1 IC6 2 3 E Q1 C B E Q2 C B E Q3 C B E Q4 C B E Q6 C B E Q7 C B E Q8 C B E Q9 C B E Q10 C B E Q11 C B E Q12 C B
STBY 0.0 3.0 0.6 0.0 3.4 3.4 0.0 0.0 1.7 0.7 0.2 2.0 0.8 1.1 4.8 1.7 0.5 1.6 1.1 0.0 3.3 0.0 6.1 9.0 6.8 0.0 0.0 0.7 0.0 3.2 0.0 0.0 6.2 0.0 3.3 6.1 4.0 3.3 0.0 2.7
TALK 0.0 0.2 0.6 0.0 3.1 3.1 0.0 0.0 1.6 0.7 0.1 2.0 0.8 1.1 4.8 1.7 0.5 1.6 1.1 0.0 3.1 0.0 6.1 9.0 6.8 0.0 0.0 0.7 0.0 3.1 0.0 0.0 0.0 0.7 3.2 6.1 3.8 3.2 3.1 2.4
NOTE OPEN
GND GND
GND
GND
GND
21
Handset Ref. No. PIN 1 2 3 4 5 6 7 IC401 8 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 11 IC403 12 13 14 15 16 17 18 19 20 21 22 23 24 1 2 IC404 3 4
Unit[V] STBY 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0-2.0 0-2.0 0-1.5 0-0.4 0-0.4 0-0.4 0-1.8 0.0 0.0 0-3.0 0.0 0-1.0 0-3.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0-0.3 0.0 0.0 0.0 0.0 3.5 0.0 0.0
TALK 2.9 2.5 2.5 3.0 2.6 2.6 2.6 3.0 0.9 0.6 0.7 0.8 0.0 0.0 0.0 3.0 1.9 1.9 1.5 0.6 1.5 1.5 1.8 3.4 0.0 1.6 0.0 1.5 3.0 1.5 1.5 3.4 3.4 1.5 1.5 1.5 0.6 1.5 1.5 1.5 0.0 3.4 0.0 0.0
Unit[V]
NOTE
Ref. No. PIN 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 IC404 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
OPEN GND
GND GND
OPEN
OPEN GND GND
22
STBY 0.0 0-3.5 3.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0-3.0 1.0-3.0 0 3.8 3.5 3.5 3.5 3.5 3.5 3.8 3.8 0.0 0.0 0.0 0-3.0 0 0-2.4 0.0 0-0.8 0.0 0-3.0 0-3.0 0-3.0
TALK 2.0(AC) 2.0(AC) 3.4 0.0 0.0 0.0 3.4 3.4 3.4 3.4 0.0 0-0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.4 3.4 0 3.8 3.4 3.4 3.4 3.4 3.4 3.8 3.8 3.3 0.0 0.0 0-3.0 0.0 0.2 0.0 0.8 0.0 0.0 3.0 3.0
NOTE
GND OPEN OPEN
OPEN OPEN GND OPEN
OPEN
GND
Unit[V] Ref. No. PIN 1 2 IC405 3 4 5 1 2 IC406 3 4 5 E Q401 C B E Q402 C B E Q403 C B E Q404 C B E Q405 C B E Q406 C B E Q407 C B E Q408 C B E Q409 C B E Q410 C B E Q411 C B
STBY 0.0 0.0 0-1.2 0-3.0 3.8 3.8 3.8 0.0 3.8 3.8 0.0 0-2.0 0-0.8 0.0 0-2.0 0-0.8 0-3.0 0.0 0-2.4 0.0 0.0 0.0 0.0 3.8 0.0 0.0 3.8 0.0 0.0 0.0 0.0 0.0 3.8 0.0 0.0 0.0 0.0 0.0 3.8 0.0 0.0 3.5 0.0
TALK 3.4 0.0 1.2 3.0 3.8 3.8 3.8 0.0 3.8 3.8 0.0 1.7 0.7 0.0 1.9 0.7 3.0 2.9 2.2 0.4 1.9 1.0 0.5 2.6 1.2 0.5 2.5 1.2 0.0 0.0 0.0 0.0 3.8 0.0 0.0 0.0 0.0 0.0 3.8 0.0 0.0 3.4 0.0
Unit[V]
NOTE
Ref. No. PIN E Q412 C B
GND
GND
GND
GND
GND
GND
GND
23
STBY 0.0 0-0.5 0-0.5
TALK 3.3 1.5 1.5
NOTE
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