LG Electronics RT-29FB50VB/VE, RT-29FB50RB service manual Trouble Shooting, RF- Stereo

Page 18

TROUBLE SHOOTING

RF- STEREO

Selected correct system

In menu

OK

Check the waveform

 

NO

At pin 17 of TU101

 

 

 

 

 

 

 

 

 

 

 

 

OK

NO

 

 

 

 

 

 

Check the waveform

 

 

 

 

 

 

 

 

 

 

 

 

At pin 24,25 of IC661

 

 

 

 

 

 

 

 

 

 

 

 

 

OK

NO

 

 

Check the waveform

 

 

 

 

 

 

 

At pin 4,12 of IC602

 

 

 

 

 

 

OK

NO

 

 

 

 

Check the Voltage

 

At pin 6, 7 of IC602

 

 

 

 

 

OK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check the waveform

 

 

 

At pin 1, 2, 14, 15 of IC602

 

 

 

 

 

 

 

 

 

OK

NO

 

 

 

 

Check the Voltage

 

 

At pin 3,13 of IC602

 

 

 

 

 

 

 

 

 

 

 

 

Check / Replace

TU 101

Check The Voltage At pin 16,33,46, of IC661

Check / Replace

Q671, 672

Check / Replace

Q621, IC603

Check / Replace

F851, D862

NO

Check The voltage

At pin of IC610, IC853

NO

Check / Replace

IC610, IC853

No Raster / Sound OK

Check the

Heater voltage of CPT (6 ~ 6.5Vrms)

OK

NO

Check

HV, Screen Voltage of

CPT

 

 

 

NO

OK

 

 

 

Check

IK Current of

IC01, pin37,39,40

NO

Check the

Heater pulse of FBT

T402

OK

 

NO

 

 

 

 

 

Check FBT T402

Check / Replace

CPT Board

Components

Check

FR901, P402A

P402B, P302

Check

IC01, Q901, IC901

P03A, P03B, P541

Check FBT T402

- 18 -

Image 18
Contents Color TV Contents Safety Precautions Important Safety NoticeSpecifications Vision ifWith Teletext / PIP Remote control handsetPower Number ButtonsBattery installation CF/CT-25/29M30 series RF/RT-25/29CA40 series6 3 CF/CT-25/29Q40 seriesDisassembly Instructions Important note Chassis Assy RemovalFocus Adjustment Safety PrecautionsDvco Adjustment Screen Voltage & White Balance AdjustmentDeflection Data Adjustment Line SVC-2 Preparation for Deflection AdjustmentN50Hz W50Hz Z50Hz N50Hz W50Hz Z50Hz N60Hz W60Hz Z60Hz50Hz 60Hz SVC Data & PSM,SSM Data Option Adjustment OPTION-1,2, 3,TeletextPicture Setting Data Line SVC-3 Menu Range 25/29 LG Flat 29 S/S-Flat 25 FST 28 FST 29 FSTOption 2 Function Option 1 FunctionOption 3 Function Sound PRE-SCALEROption 4 Function Option Code FuntionOption Code Funtion WEST-EU Block Diagram CathodeTilt ST-BY Trouble Shooting RF- StereoNo Raster No Picture / No Sound Page Exploded View Exploded View Parts List Replacement Parts List DiodeTransistor Capacitor 0CQZVBK002C ECQ-V1H334JL3NP0 TS 330UF SLT 450V M Vnsn BulkConnector Coil & TransformerCONNECTOR,2.36PAI 1P . K/M Auto CONNECTOR,2.5MM 3P GIL-G LG Cable SResistor 0RMZVBK002D 0RKZVTA001K0RKZVTA001C Filter & Crystal SwitchAccessories Miscellaneous2002.03.25 Printed Circuit Board 3854VA0098A-S2/2SVC. Sheet