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LG 21SA1RG, Service Manual

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LG 21SA1RG Service Manual Download Page 1

COLOR TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : CW81B

MODEL : 21SA1RL/RG/RLX

MODEL : 

21SA1RL/RG/RLX-L4

North/ Latin America      http://aic.lgservice.com
Europe/Africa                 http://eic.lgservice.com

Asia/Oceania                 http://biz.lgservice.com

Aug., 2009

Printed in China

P/NO : MFL42466416

Internal Use Only

Summary of Contents for 21SA1RG

Page 1: ... SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS CW81B MODEL 21SA1RL RG RLX MODEL 21SA1RL RG RLX L4 North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Aug 2009 Printed in China P NO MFL42466416 Internal Use Only ...

Page 2: ...quency 42 17 MHz Center frequency 44 MHz CHASSIS CONSTRUCTION IC Solid state chassis PICTURE TUBE Type No A51QGV991X001 D SOUND OUTPUT 7W or 10W CABINET Plastic ABBREVIATIONS Used in this book ADJ Adjustment or Adjust AFC Automatic Frequency Control AGC Automatic Gain Control AMP Amplifier CRT Cathode Ray Tube DEF Deflection DET Detector FBT Flyback Transformer H V High Voltage OSC Oscillator SEP ...

Page 3: ...ge exceeds specified limits check each component specified on the chassis schematic and take corrective action 2 Read and comply with all caution and safety related notes on or inside the receiver cabinet on the receiver chassis or on the picture tube 3 Design Alteration Warning Do not alter or add to the mechanical or electrical design of this TV receiver Design alterations and additions includin...

Page 4: ...unterclockwise until horizontal line faintly visible Exit screen voltage adjustment by press Enter A key of factory remote control 5 Purity and Convergence Adjustment 5 1 Purity adjustment 1 Adjustment Preparation 1 Receive Red Raster Pattern for purity adjustment 51CH 2 Demagnetize the CPT and Cabinet with a degaussing coil 2 Adjustment 1 Pre adjust the static convergence STC with the 4 and 6pole...

Page 5: ...ry remote control 2 Enter white balance adjustment mode by pressing INSTART key of factory remote control 3 Use the CHD CHE Key to choose adjustment item 4 Use the VOLF VOLG Key to change item data 5 Adjustment Procedure a Make the picture luminance 45Ft L by changing the CONTRAST and BRIGHTNESS b Adjust X data of High light with R DRIVE and Y data of high light with B DRIVE to have the color temp...

Page 6: ...alike with the one of the lower circle at LG standard pattern PAL EU05CH NTSC 13CH 3 Vertical Size Adjustment Select SVC02 VA and adjust so that the middle circle of the Digital Pattern 480NC 13CH coincide with the effective screen of CPT 4 Horizontal Position Adjustment Select SVC02 H POS and adjust so that the left and right vertival line are symmetrical as possible 5 Horizontal Size Adjustment ...

Page 7: ...RK REMARK CODE 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 CODE 0 1 0 1 0 1 0 1 0 1 CODE 0 1 0 1 CODE 0 1 2 0 1 2 0 1 2 0 1 2 0 1 2 3 Observación 0 Slim Ultra 1 Normal Flat 1 With 0 Without 1 With 0 Without 1 Volume Curve high 0 Volume Curve low 1 With Video Mute 0 Without 1 With Sound Mute no signal 0 Without no signal 1 SUB ADJ CH FIX SUB 14CH TINT 02CCH 0 Without 1 With 0 Without Observación 1 With DVD inp...

Page 8: ...6 0 Remark Necessary Necessary Others CPT IRICO CPT Unnecessary Necessary Necessary Unnecessary Necessary Unnecessary Unnecessary Unnecessary Ultra 2 LG CPT Ultra HF CPT FLAT HF CPT FLATIRICOCPT FLAT LG CPT Necessary Ultra 2 LG CPT Ultra HF CPT FLAT HF CPT FLATIRICOCPT FLAT LG CPT Unnecessary Ultra 2 LG CPT Ultra HF CPT FLAT HF CPT FLATIRICOCPT FLAT LG CPT Necessary Ultra 2 LG CPT Ultra HF CPT FLA...

Page 9: ...Trap 1 4 43MHz Trap 2 Wide mode 3 4 286MHz Trap 0 3 58MHz peaking 1 3 58MHz symmetrical 2 4 43MHz peaking 3 4 43MHz symmetrical 0 Chroma trap ON composite video mode 1 Chroma trap OFF YCbCr mode and YC mode 0 Coring OFF 1 Coring Gain 1 minimum 2 Coring Gain 2 middle 3 Coring Gain 3 maximum 0 narrow 3 wide 0 narrow 3 wide 0 WPL OFF 1 High operating point 2 Middle operating point 3 Low operating poi...

Page 10: ...n operation 0 7 30dB 40dB 0 7 Auto green off level high 0 Normal mode 1 Tint control set center value cann t control tint 0 Easy to become NTSC 1 Easy to become PAL 0 7 0 Normal mode 1 VCO free run mode 0 FSC OUT 1 EHT 0 PAL NTSC 4 43 NTSC AUTO 1 PAL M PAL N NTSC AUTO 2 PAL 3 PAL M 4 PAL N 5 NTSC 6 4 43NTSC 7 Not available 0 15 0 15 0 31 0 31 0 15 0 Color ON 1 Color OFF 0 Normal mode 1 VXO free ru...

Page 11: ...m IC Only Text Only Text Only 0 NORMAL 100 Min Reduce DVD Volume Only for hotel model PIP PIP PIP PIP PIP SECAM ONLY SECAM ONLY SECAM ONLY SECAM ONLY BTSC only 0 17 1 24 BTSC only 0 38 1 47 BTSC ONLY 0 11dBV 1 5 5dBV Initial SECAM 0 3 0 0 8 8 8 8 8 8 0 2 3 3 100 18 18 2 1 2 0 0 0 0 1 0 0 Remark Unnecessary Unnecessary Unnecessary Unnecessary Unnecessary Unnecessary Unnecessary Unnecessary Unnecess...

Page 12: ...C521 R528 RGB 9V C510 C511 R515 IF VCC C528 C526 L528 C547 VCC C518 L503 POWER SUPPLY SECTION 1 CHIP IC IC501 LV762XX 61 64 31 32 1 13 12 41 17 22 12500 VIDEO MICOM 46 49 TUNER NO CH SEARCH NO PICTURE NO SOUND X501 R537 OSC SECTION 4 43MHz SET Maneuver defectiveness Clock Error OSD Not Working MENU Picture Error L IN L221 C215 R IN L222 C222 IN L225 R226 IN C210 C211 C212 IN L221 C215 IN L222 C222...

Page 13: ...01 7 Vcc T X Pre Amp 110V D824 SFAF504G C831 330u 25V 11V D813 RU3AMV C826 1000u 16V R873 47 0 5W D Coil Relay MAIN IC 24 Vcc EEPROM 8 Vcc IC804 LV76213 9 Vcc D826 RU3AMV LV76213 20 Vcc LV76213 49 Vcc FBT B R833 RS 0 47 2W L802 82uH FR403 RF 1 2 2W Tuner 30V KIA78R09API 112 17V 395mA 110 1V 110 07V 109 63V 380mA 29 97V 10mA 3 3V 10mA 5 0V 13mA 8 0V 15mA 14V 25mA KIA78L05BP IC803 R620 RS 5 6 2W 5 0...

Page 14: ...PROTECTION ENABLE POWER OFF 15300 15301 15303 15305 15304 15306 15308 FR301 D301 C303 C309 C306 O STAGE V REF R305 R309 R311 C322 6 VERTICAL SECTION H O R Z D Y FBT T402 HORZ DRIVE SECTION R403 R401 Q401 T403 C404 H OUT 47V VCC DEFLECTI0N PROB POWER OFF HORZ O P SECTION Q402 C414 HORZ DEF COMPENSATION SECTION HEATER VOLTAGE FR401 X RAY WORKING SAFETY PROB ROLLING PICT 180V VOLTAGE FR501 D505 C540 ...

Page 15: ...O PROCESSING SECTION CPT e GUN ONE SIGNAL R G B MISSING NO PICTURE CPT Dead 16004 DISCHARGE PROTECTION CIRCUIT ONE SIGNAL R G B MISSING 16101 R G B Signal IN L902 L903 L904 16005 Spot Killer CIRCUIT SPOT TRAY C901 R902 D903 16002 Vcc 180V 1 5 GND R G B L902 L903 L904 R915 C907 R905 C904 R922 C902 R921 R906 R916 Q901 Q902 9V R908 L901 180V D902 9 CPT DRIVE SECTION The CPT BOARD assembly is composed...

Page 16: ...al and mechanical parts in this chassis have special safety related characteristics These parts are identified by in the Schematic Diagram and EXPLODED VIEW It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X RADIATION Shock Fire or other Hazards Do not modify the original design without permission of manufacturer I...

Page 17: ...P NO 3854VA0196D 08 04 14 2009 DIAGRAMA ESQUEMÁTICO ...

Page 18: ...IC751 LA72730 STEREO Opt JA01 HIC291 Game Pack Game Opt HIC291 Game Pack Game Opt 4 5 6 8 7 From USOC Video Game Audio Game 54 SIF out IF 3 6 11 1 4 7 2 5 9 LA72702 BTSC IC701 LIN TV RIN TV 2 1 19 20 R L Out L OUT R OUT SAW SAW 5 9 10 IF IN Z102 10 11 13 14 15 12 SIF IN 32 61 V OUT Mono 18 17 18 2 7 50 Ext R L IN 49 RGB 9V SCL SDA 27 26 33V ST 5V 9v From IC804 9v From IC804 ST 5v From IC04 19 9 24...

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