Lg Tv Tips Averias Varias

LG CTV LG

Chassis: SERVICE MODES SERVICE TIP

Chassis: PROJECTOR 1 Make Covered LG

Model Covered RT39NZ40RB

F: 45669 For most LG models to date. R: Press OK button on remote and handset for >11 seconds. Also have as also press OK on the TV. SERVICE MODES

Chassis: 995B

HORIZONTAL F: 53014 No go and buzzing. R: B+ OK at 115V on the output transistor, replace leaky driver FET Q413 PN (0TF200000AA).

Chassis: PROJECTOR 2 Make Covered LG

Model Covered RT52SZ60DB

POWER F: 53002 No picture, attempts to start but after several attempts, shuts down. R: Lamp faulty PN (6912B22002C).

Chassis: PROJECTOR 3 Make Covered LG

Model Covered RT56NZ23RB

COLOUR F: 53001 No green. R: Replace the video output IC (TDA6111Q) on green gun tube base PN (0IPH611190A).

Chassis: LG UNK01 Make Covered LG

Model Covered RT29FA33

F: 49321 No picture, sound OK. R: Check D901, D902 and D903 for leakage. RT29FA33

Chassis: LG UNK02 Make Covered LG

Model Covered RT44NZ22RB

Chassis: LG UNK03 Make Covered LG

Model Covered RT39NZ40RB

CT25Q26ET

KB14P2B KB14U73

LG

KB20P30

PINCUSHION

LG

KB20U73

LG

KB21P30

F: 48177 Width reduced with pin distortion. R: Replace IC302 ( KIA4558) LG P.N. ( 01KE455800E). CT29M30N

RT32FZ10PX

KB14P2B

CT29M30N

F: 52485 No power. R: Replace EHT transformer. PN (6174V6003E). RT32FZ10PX

BRIGHTNESS

F: 48862 Power supply pulsing. R: Measure pin 5 of IC901 to ground, if short replace the IC. CT29Q47E

F: 52484 Burning smell. R: Replace C411(10uF250V) and C412 ( 220nF400V). RT29FA31PX

F: 42885 Low brightness R: Disconnect pin 22 of IC500 (TDA8841) if brightness OK replace the IC. KB14P2B F: 52670 Washed out picture, looks like the tube. R: Replace leaky ZD702 (8.2V zener) in the ABL circuit. KB20U73

COLOUR F: 38646 No colour. R: Replace IC5001(TDA8841), the jungle. KB20P30

POWER F: 48042 No power. R: Replace line output (2SD2499), C782 (1uF160V) re-solder the drive and output transformer. KB20U73 F: 51655 Intermittent tuning, seems to tune but finds nothing. R: Check for dry joints on the tuner pins in the VCR KB14P2B

VERTICAL F: 46821 Vertical collapse R: Replace the vertical IC(TDA8351) KB14U73

F: 45037 No power. R: Replace crystal XP01(20.25MHz). F: 50211 No power. R: Regulator IC (STR6656) blown to bits, replaced regulator, mains filter and fuse.

LG

CF20F20K

LG

CF21F80K

LG

CF21T31KX

LG

CT15Q91EK

F: 49177 No go but has a buzz. R: Remove the yoke and check for rot due to conductive glue. CA21M60X

LG

RT21FA31

LG

RT21FA32

F: 48372 No power. R: Replace C813 (1nF1KV) next to the bridge. RT29FA30RX

AUDIO

RT29FA30RX

F: 48387 Will not switch on. R: Replace IC901(STV5109) on the tube base. RT29FA30RX

PURITY F: 46467 Intermittent degaussing. R: Dry joint on primary of RL801. CT29M30N

REMOTE F: 46642 Intermittent remote control functions. R: Check if the customer is using miser light globes. CT25Q26ET

CA21M60X

LG

CT25Q26ET

F: 46644 Will only memorise one channel on all 99 selections R: Replace the tuner, faulty micro inside the tuner. CT29M30N

LG

CT25Q46ET

VERTICAL

LG

CT25Q47E

F: 48281 Vertical IC blown up. R: Check C302 (0.33uF100V) being inoperative, located on pin 2 of IC301.

LG

CT29M30N

LG

CT29Q26ET

F: 48411 No vertical scan. R: Replace IC301(LA7845). RT29FA30RX

LG

CT29Q46ET

LG

CT29Q47E

LG

RT29FA30RX

RT28FZ10RX

PICTURE F: 52615 Picture blooming on scene change. EHT is excessive. R: Replace C407 (22nF2KV). RT28FZ10RX F: 52664 Dark picture when warms up. R: Replace C903 (1200pF2KV) on the tube base. RT28FZ10RX

POWER F: 52517 Keeps blowing line output transistor R: Replace line transistor and must also replace C407 and C410 RT28FZ10RX

Chassis: MC00AA

AUDIO F: 46643 No, or intermittent sound, distorted or motor-boating. R: Replace XN01(18.432MHz crystal). CT29M30N

F: 52975 No sound or intermittent speaker one channel. R: Faulty speaker PN (120-C77G). CT29M30N

AV F: 46645 AV3 does not function. R: Replace ICV01(VDP3120B) on the VCD board. CT29M30N

COLOUR F: 46461 Grey scale lacking green and has retrace lines. R: Tube voltages almost correct, replace IC901 on the tube base, LG PN.( 0ISG510900A) CT29M30N

Make Covered

F: 52606 No power or LED. R: Replace line output Q401(ST2310HI). Use BU2520AF. RT28FZ10RX

F: 42451 Intermittent control panel lock up and no picture. R: Replace X701(27mHz crystal) on the text panel. CA21M60X

Compiled and Printed by EFIL Pty. Ltd.

Phone +61 3 97406994

Model Covered

F: 50212 Low and buzzing sound, some trace of sound content. R: Replace IC601(TDA9859) LG PN ( 0IMCRPH010A) CF21T31KX

PICTURE F: 51306 Picture fading out. R: Re-solder socket P302 next to the flyback. CF21T31KX

POWER F: 45048 No power. R: Replace the micro or IC901 the video output. CF21T31KX F: 52990 No power. R: Replace regulator IC (STRF6654) and fuse PN (0ISK665413A). RT21FA31 F: 46476 Will not turn on, red light on. R: Replace IC842 the stand-by 5V regulator. (low output) CF14F80K F: 45429 Stuck in stand-by. R: Found low B+ due to C820 (220uF160V) damaged by leaky D807. CF14F80K F: 52610 No power or LED R: Replace IC842 (5V regulator). Use 78L05. CF21F80K

REMOTE

LG

CA20T37EX

LG

CA21T37EX

F: 48619 Intermittent remote functions. R: Customer may be using power miser globes. CF14F80K

LG

CF20T37EX

VERTICAL

LG

CF21T37EX

LG

CT20T38EN

LG

CT21T38EN

F: 37095 No vertical scan with multiple other function faults. R: Replace the 27Mhz crystal on the teletext panel. CF21T31KX

Chassis: MC022A

AGC F: 48621 Snowy picture. R: Replace L103 in the 8V supply. CA20T37EX

POWER F: 48620 Buzz in sound lines on the picture. R: Replace the mains filter capacitor. CA20T37EX

Chassis: MC017A Make Covered

FUNCTIONS

Model Covered CF14F80K

LG

Model Covered

Make Covered LG

TUNER Make Covered

Chassis: MC019A

CT25Q47E

F: 52833 No power. R: Replace C917 / C941(10nF500V) located on the SVM board. RT39NZ40RB

F: 52673 No audio. R: Replace sound controller IC661( MSP3410G-B8-V3).Lg PN (01MCRMN011C).

F: 49628 No power but supply OK. R: Replace R443 (1ohm FR) in the 20V rail.

F: 45574 Protection switching set down. R: Replace R421(180K1W) on the 200V rail.

CT25Q47E

AUDIO

F: 48885 C488 (10uF400V) failed. R: Cause is an intermittent failure in C412 (0.22uF400V). RT32FZ10PX

POWER

CT29K37E

RT28FZ10RX

POWER

AUDIO

CT29K36T

LG

F: 52389 Intermittent AV. R: Blanket solder the AV assembly.

F: 52415 Distorted sound. R: Enter sound system and set it to BG.

LG

Model Covered

AV

F: 51381 Intermittently cuts out. R: fly-back transformer pin feeding B+ to vertical was dry joint. RT32FZ10PX

LG

Chassis: LG UNK04

F: 52553 No audio. R: Replace IC601(OIMCRMN011A) . Must have "A" suffix RT29FA31PX

RT32FZ10PX

POWER

Make Covered

AUDIO

F: 45036 Thin blue lines across the screen. R: Replace IC901. CT25Q46ET

LG

Model Covered

Chassis: MC007A

RT44NZ22RB

F: 45035 No picture. R: Dry jointed fly-back transformer, pin 1.

LG

POWER F: 49817 Comes on then cuts out. R: Clean and re-solder D815 and FB811.

PICTURE

F: 50225 No picture, set hiccupping R: Replace IC901(STV5109) the video output causing a on the 200v line. LG PN (0ISG510900A). RT29FA30RX

Make Covered

TUNER

PICTURE

F: 45038 AV3 input not working. R: Replace ICV01(VDP3120B) located on the VCD panel. CT29K36T

Model Covered

LG

RT29FA31PX

LG

RT32FZ10PX

Fax +61 3 9740 6990

www.efil.com.au

Make Covered

Model Covered

LG

CT29M30RX

LG

CT29Q4OVQ

LG

RT29FB70RQ

LG

RT32FZ11RX

AUDIO F: 53006 No audio on any input. R: If output stage is alive replace IC661(0IMCRMN011C). CT29M30RX

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