LG 21FG5AG Service Manual Download Page 1

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COLOR TV

SERVICE MANUAL

CAUTION

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

CHASSIS : CW81B

MODEL : 21FU6PL/RL/RLX/RG/

TL/TLG/TG/RLG

MODEL :

21FU6PL/RL/RLX/RG/

TL/TLG/TG/RLG-T4/Z4

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

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

Oct., 2008

Printed in China

P/NO : MFL42115601

ON/OFF

Internal Use Only

Summary of Contents for 21FG5AG

Page 1: ... THIS MANUAL CHASSIS CW81B MODEL 21FU6PL RL RLX RG TL TLG TG RLG MODEL 21FU6PL RL RLX RG TL TLG TG RLG T4 Z4 North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Oct 2008 Printed in China P NO MFL42115601 ON OFF Internal Use Only ...

Page 2: ...ECAUTIONS 3 SPECIFICATIONS 4 ADJUSTMENT 6 TROUBLE SHOOTING 14 BLOCK DIAGRAM 18 PRINTED CIRCUIT BOARD 19 EXPLODED VIEW 21 Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 3: ...ic parts of the cabinet such as antennas terminals etc to be sure the set is safe to operate without damage of electrical shock Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch o...

Page 4: ...ing System Available Channel Input Voltage Market Screen Size Aspect Ratio Display Method Tuning System Operating Environment Storage Environment Specification PAL BG DK I NTSC M AV 3 58 4 43 PAL BG DK I NTSC M AV 3 58 4 43 SECAM DK PAL NM NTSC M AV 3 58 PAL BG DK I NTSC M AV 3 58 4 43 SECAM BG DK L VHF E2 E12 UHF E21 E69 CATV S1 S20 HYPER S21 S41 AC220V 50 60Hz AC100 240V 50 60Hz Korea Latin Amer...

Page 5: ... Child lock Etc Sleep Review Specification 2 AV 1 1 Monitor out 1 Input For component Power Vol F G PR E D MENU OK Turbo Picture Sound LG Code NEC System Storage Normal Turbo Storage System Channel Fine Search Name Copy Move Delete Skip 8 Channel Dynamic Standard Mild Game User Contrast Brightness Color Sharpness Tint NTSC M Only ON OFF Flat Music Movie Sports User 0 100 ON OFF Off On Pr 1 VOL 30 ...

Page 6: ...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 7: ...G 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 temperature as shown below c Make the picture luminance 4 5Ft L by changing the CONTRAST and BRIGHTNESS d Adjust X data of low light with R BIAS and Y data of low light with B ...

Page 8: ...nt Select SVC02 EW WIDTH and adjust so that the outer line of the left and right and the remotest grid will correspond to the effective boundary surface The remotest grid PAL within 0 25 NTSC within 2 5 3 0 column 6 Parabora Adjustment Select SVC02 EW PARAB and adjust so that the vertical line of the remotest grid at the left or right side of the screen will be parallel to the vertical line of the...

Page 9: ...ass operation 1 Decreased Bass operation for Pakistan DESCRIPTION 0 MONO 1 AV STEREO 2 RF STEREO 3 AV ST NOSW 0 NO AV 1 AV1 2 AV1 2 0 4 KEY 1 6 KEY 2 8 KEY 0 NICAM ON TH Off 1 NICAM ON TH On OPTION 1 CPT V CURVE V MUTE SND MUTE Teletext Reserved OPTION 2 DVD EYE GAME X WAVE COLOR T Degausss HOTEL 200Pr OPTION 3 QUARRAN DUAL SV PIP SND FL1 SND FL2 SND2FL1 SND2 FL2 HIDEV OPTION 4 OSD LANG TXT LANG P...

Page 10: ...8 18 17 17 18 37 20 65 24 14 14 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 U...

Page 11: ...C 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 point 0 Low operating point 1 Middle operating point 2 High operating point 3 Defect 0 100 1 107 2 113 3 129 0 Black Stretch ON Starting Point 401RE 1 Black Stretch ON Starting Point 501RE 2 Black Stretc...

Page 12: ...TO 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 run mode 0 Normal mode 1 VXO Standby mode 0 Normal mode 1 Minimize the gain of VIF amplifier 0 Internal Video out mode 1 Selected External video output mode 0 38 0 MHz 1 38 9MHz 2 39 5MHz 3 45 75MHz 0 7 0 APC Voltage sample holde circuit type 1 APC detector stop type ...

Page 13: ...P PIP PIP 24dB 0dB 6dB 24dB 0dB 6dB 24dB 0dB 6dB 24dB 0dB 6dB 0 127 0 255 1 127 1 255 0 255 msec 0 255 msec Clock recovery count level1 0 127 Clock recovery count level2 0 127 Initial PAL 0 2 0 0 8 8 8 8 8 8 0 2 3 3 1 0 0 0 0 0 100 18 18 2 1 2 29 29 30 10 48 0 47 0 5 160 4 2 5 1 0 Initial SECAM 0 2 0 0 8 8 8 8 8 8 0 2 11 0 0 0 0 0 3 3 1 0 0 0 0 0 100 18 18 2 1 2 29 29 30 10 48 0 47 0 5 160 4 2 5 1...

Page 14: ...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 15: ...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 16: ...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 17: ...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 18: ... 5V 5 1V IC751 LA72730 STEREO Opt 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 ...

Page 21: ...1 EXPLODED VIEW Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 170 150 913 112 520 590 530 300 400 943 120 330 320 310 311 510 option 174 ...

Page 22: ...P NO 3854VA0196D 08 04 14 ...

Page 23: ...SVC SHEET 3854VA0196D S ...

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