LG Electronics RT-21FA35R/RX/V/VX Trouble Shooting, RF- Stereo Model Picture O. K / no Sound

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TROUBLE SHOOTING

RF- STEREO MODEL

PICTURE O. K / NO SOUND

Selected correct system

In m enu

 

OK

NO

 

 

 

Check the waveform

IF 1 of TU101

 

 

 

 

 

OK

NO

 

 

 

Check the waveform

At pin 4, 5 of IC11

 

 

 

 

 

OK

 

 

 

 

 

 

Check the waveform

 

At pin 2, 4 of IC601

 

 

 

 

 

OK

NO

 

 

 

Check the waveform

At pin 6 of IC601

 

 

 

 

 

 

OK

 

 

 

Check the waveform

At pin 8, 9, 11, 12 of IC601

 

 

 

 

 

OK

NO

 

 

 

Check the waveform

At pin 5, 6 of IC601

 

 

 

 

 

 

Check / Replace

TU 101

Check The Voltage

At pin 2, 19, 20, 21, 24 of IIC11

Check / Replace Q601

Check / Replace

F806, D828(D805)

NO

Check The voltage

At pin of IC821, IC822, Q807

NO

Check / Replace C821, IC822, Q807

No Raster / Sound OK (1/ 2)

Check the

Heater voltage of CPT (6~ 6. 4Vrm s)

Check

HV, Screen Voltage of

CPT

Check

R, G, B out of CPT Board

Check the

Heater pulse of FBT T402

Check FBT T402

Check 185V line of CPT Board & if no problem check and Replace

Check

IC901, P903A

Check RF901, P402 P402B, FR401

Check FBT T402

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Contents MODELRT-21FA35R/RX/V/VX MODELRT-21FA315EX/PX Contents Safety Precautions Important Safety NoticeRemote control handset Sleep VCR ButtonsPIP SwapMain Power ON/OFF POWER/STANDBY IndicatorRemote Control Sensor Front panelSpecifications General SpecificationScope Requirement for Test Test and Inspection MethodPurity & Convergence adjustment Focus adjustmentApplication Object Screen voltage adjustment White balance adjustmentDeflection setting Data Adjustment Option Adjustment Preparation for AdjustmentOPTION2 Function OPTION3 FunctionOPTION4 Function Trouble Shooting RF- Stereo Model Picture O. K / no SoundCheck B+ SCL, SDA AV Sterro / Mono Model Printed Circuit Board Component Location Guide PIP Diagram BlockExploded View Exploded View Parts List DescriptionsTransistor DiodeCapacitor 22UF STD 16V M FL TP5 1UF STD 50V M FL TP510UF STD 25V M FL TP5 47UF STD 16V M FL TP5Coil & Inductor Resistor0RKZVTA001K RWR 7W 1.0 OHM J PDSwitch AccessoriesFilter & Crystal MiscellaneousNo 3854VA0162A S1 SVC. Sheet 3854VA0162A-S Sep.,2004