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P/NO : MFL42466416Aug., 2009Printed in ChinaNorth/ Latin AmericaEurope/AfricaAsia/OceaniaCOLOR TVSERVICE MANUAL
CHASSIS : CW81BMODEL : 21SA1RL/RG/RLXMODEL :21SA1RL/RG/RLX-L4CAUTIONBEFORE SERVICING THE CHASSIS,READ THE SAFETY PRECAUTIONS IN THIS MANUAL.Internal Use Onlyhttp://aic.lgservice.comhttp://eic.lgservice.comhttp://biz.lgservice.comAdvertisement
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Summary of Contents for LG 21SA1RL
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Page 1: Service Manual
North/ Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com COLOR TV SERVICE MANUAL CHASSIS : CW81B MODEL : 21SA1RL/RG/RLX MODEL : 21SA1RL/RG/RLX-L4 CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. Aug., 2009 P/NO : MFL42466416 Printed in China... -
Page 2: Table Of Contents
APC ............Automatic Picture Control SYNC ..............Synchronization S.I.F..........Sound Intermediate Frequency BM ..................B+ Main V.I.F ..........Video Intermediate Frequency BT .................B+ Tuning Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 2 - Only for training and service purposes. -
Page 3: Safety Precautions
X-radiation protection circuits also must be reconfirmed each time Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 3 - Only for training and service purposes. -
Page 4: Adjustment Instructions
These instructions are applied to CW81B Chassis. 4-1. Adjustment (Using Factory Remote Control) 1) Input in the 75Ω cable LG standard signal (Digital Pattern, 2. Notes 480NC). 1) Because this is a cold chassis, it is not necessary to use an 2) Press the “ADJ’... -
Page 5: White Balance Adjustment
6) Converge the R, G, B horizontal line in unity(same line) by turning the 2 tabs of the 6-pole magnet. At this time, do Receive LG standard pattern (NTSC: Crosshatch pattern, Ch.09) not change the angle between the 2 tabs. - Page 6 CPT. 2) Vertical linearity Adjustment Select SVC02(V-LIN) and adjust so that the size of the upper circle is 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.
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Page 7: Hp Bow 0
0: 4 KEY; 1: 6 KEY; 2: 8 KEY TXT LANG 0/1/2/3 0: EU WEST; 1: EU EAST; 2: ARABIC 3: FARSI <Table 1> Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 7 - Only for training and service purposes. -
Page 8: Deem Tc
Ultra HF CPT FLAT HF CPT FLAT IRICO CPT FLAT LG CPT Necessary EW COR 0:normal mode Unnecessary 1:corner pin gain up mode Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 8 - Only for training and service purposes. -
Page 9: Svc
0: YC_C; 1: 2.2V_DC Unnecessary TXT CC 0: Output without LPF; 1: Output by LPF Unnecessary VIN/XRGB 0: FBP/EXT RGB IN; 1: YC-C/DVD-Y/CR-IN/CB-IN Unnecessary Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 9 - Only for training and service purposes. -
Page 10: Gamma St 0: Low Operating Point; 1: Middle Operating Point
200KHz (4.5-0.5v change); 1: 150KHz (4.5-0.5v change) Unnecessary AFT SENS ± ± 100KHz (4.5-0.5v change); 3: 50KHz (4.5-0.5v change) Unnecessary VCO ADJ Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 10 - Only for training and service purposes. - Page 11 Unnecessary 0:17% Unnecessary 1:24% Unnecessary STE sens BTSC only Unnecessary Unnecessary 0:38% 1:47% Unnecessary SAP LEVEL BTSC ONLY Unnecessary 0:-11dBV 1:-5.5dBV Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 11 - Only for training and service purposes.
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Page 12: C Trap 0 (Min) ~ 7 (Max)
TUNING Problem 3. VIDEO PROCESSING 35,36,40 50~64 61 ~ 64 31,32 1 CHIP IC (IC501) 46~49 LV762XX 17~22 1~13 04,09,35,4 9,62 Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 12 - Only for training and service purposes. - Page 13 R833 L802 FR403 D826 (28V~32V) 29.97V / 10mA (RS 0.47/2W) (82uH) (RF 1.2/2W) (RU3AMV) Tuner 30V C831 R107 (220u/160V) (RS 12K/2W) Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 13 - Only for training and service purposes.
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Page 14: S Trap
X-RAY WORKING SAFETY PROB ROLLING PICT 180V VOLTAGE FR501,D505,C540 HORZ LINE NO RETRACE T402 26V VOL MAIN VCC(110V) FR301,D301 ANODE FOCUS SCREEN Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 14 - Only for training and service purposes. - Page 15 R922 D902 17006 16005 Heater Voltage Spot Killer CIRCUIT FR932 C901, R902, D903 e-GUN Dead e-GUN LIFE SPOT & TRAY DECREASE Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 15 - Only for training and service purposes.
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Page 16: Exploded View
X-RADIATION,Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. (option) Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 16 - Only for training and service purposes. - Page 17 DIAGRAMA ESQUEMÁTICO 2009 P/NO.:3854VA0196D (08.04.14)
- Page 18 SCART SCART L401 HIC291 Game Pack(Game Opt) ( PHONE) ( PHONE) (FLAT OPT.) (FLAT OPT.) Game Pack(Game Opt) CPT(option) CONTROL LED & IR POWER LGE Internal Use Only Copyright©2009 LG Electronics.Inc. All right reserved. Only for training and service purposes.
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