lg Repair Tips




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MakeModel Ch.SymptomProblem SolutionSolutionBy:
Lg CI29H40 PC8KA
There was a bright white screen with flyback lines on this set. The A1 adjustment had very little effectI found that IC901 TDA6108JF on the tube base was faulty, pin 7 blue o/p and pin 8 green o/p both read s/c to ground. Note: this chip was probably taken out due to the tube flashing over as in my case
Lg CZ-20E60 11.1
Stuck in standby with no line driveR410 o/c
Lg CF-28A50T PC-58A
Flyback lines on picCheck resistor R351 in front of TDA8350Q. It should be 3.6 K. I replaced with 3.8 K and it worked fine. Additionaly check: R708, FR704, FR359, Q351, Q345. If fault persists try replacing the TDA8350Q
LG21FB32
Led fica aceso, mas não aparece imagem nem somIC 805 (SE110)
LGRP-14K40
Fonte não LigaIC501 * 1231CN
LGRP-14CB20A
Sem audioR624 - 22K
LG21M21MQ
TV liga,funciona por alguns minutos e depois desliga.R831(123k 1% tolerância) alterada
LGRP-20CC20
SC023A
TELA BRANCA EFEITO STROBESUBSTITUIR SOCKET CINESCÓPIO
LGVarious
Modifying R/C to access service modesThere is a service remote availiable but if you have a remote which uses an SAA3010T IC , simply connect a tact switch between pins 1 & 11 to access the service mode .
LGLV710
Wont tune - "SAFE" displayedSus EEPROM
LGKE14U73 Combi
Swirling lines & static pops on picpoor earthing of the deck to the screen large VCR screening can
LGKE14U73
St/by onlyHT present but no 8v supply to IC500 jungle chip pin 37. D850 in psu leaky
LGCI21T24F
St/by only - red LED lit no power to psu priDry joints RL108 relay
LGCI20E20
Dead with STRS5707 chopper chip & bridge rect s/cAlso replace 4 x elects in psu
LGCI14B50F 11.1
St/by only - no line drNo 12v supply to line dr trfmr Tr101. Check back from pin 15 chopper trfmr - R410 0R1 o/c & dry joints chopper trfmr
LGCF28C22F etc
Field collapseFit mod kit KITPC33J (7 parts inc)
LGCF25A50F
Reverts to st/by aft 2-3 secs, HT drops to 60vIC351 FOP chip TDA8350Q & FR350 10R fusible
LGCF25A50F
Field mod when FOPTr has blownFit TDA8350Q & use heatsink compound as well as the grey thermal transfer pad between the chip & the heatsink. Change C352 to 22mfd (was 47mfd) 50 volts Change C708 to 22mfd (was 47mfd) 100volts . This is located to the left of the LOPT on the 45 volts rail. Change FR359 to 22ohms half watt fuse resistor (was 10 ohms) This is also located to the left of the LOPT on the 45 volts. rail. Add a 0.01 mfd cap on pins 8 & 9 of the frame chip & 0.1mfd between pins 7 & 8 (both 100volts)
LGStudioWorks SW57i / CS590
com a largura do horizontal maior do a vizualização da tela, mesmo com controle da largura no mínimoObs CA-46 verifique o transistor de largura, pode estar em curto, tire-o da placa e vê se a imagem encolhe, se encolher troque-o, se não verifique componentes associados!!!
LGStudioWorks SW563a
Não liga,tensões fonte okJá toquei fly,micro,oscilador e não resolveu o problema,o led fica bem fraco na cor laranja. Se a fonte deste monitor estiver ok ,micro ok, oscilador ok,memoria ok,trocar o cristal oscilador do micro.Resolveu o problema.