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P/NO : MFL42115606
Jan., 2009
Printed in China
North/ Latin America
Europe/Africa
Asia/Oceania
COLOR TV
SERVICE MANUAL
CHASSIS : CW81B
MODEL : 21FK2RL/RG/RGX/RLX/
RLD/RGUL
MODEL :
21FK2RL/RG/RGX/RLX/
RLD/RGUL-T4/Z4
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
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Summary of Contents for LG 21FK2RG
- Page 1 Internal Use Only 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 : 21FK2RL/RG/RGX/RLX/ RLD/RGUL MODEL : 21FK2RL/RG/RGX/RLX/ RLD/RGUL-T4/Z4 CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. Jan., 2009 P/NO : MFL42115606 Printed in China...
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Page 2: Table Of Contents
CONTENTS ....................2 SAFETY PRECAUTIONS................3 SPECIFICATIONS ..................4 ADJUSTMENT ...................6 TROUBLE SHOOTING ................14 BLOCK DIAGRAM ...................18 PRINTED CIRCUIT BOARD ..............19 EXPLODED VIEW ..................21 Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 2 - Only for training and service purposes. -
Page 3: Safety Precautions
CONDUIT etc. component failure. To Instrument’s 0.15uF exposed METALLIC PARTS 1.5 Kohm/10W Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 3 - Only for training and service purposes. -
Page 4: Specifications
2) Humidity : ~ 85 % Storage Environment 1) Temp : -20 ~ 60 deg 2) Humidity : ~ 90 % Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 4 - Only for training and service purposes. - Page 5 On/ Off Special Language English/ Indonesia/ Thai/ Vietnam East Asia Input TV/ AV/ Component On/ Off Child lock Etc. Sleep Review Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 5 - Only for training and service purposes.
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Page 6: Adjustment
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 7 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 the LG standard pattern (PAL: Digital pattern, not change the angle between the 2 tabs.
- Page 8 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...
- Page 9 Nicamon cnt 0:NICAM ON TH Off; 1:NICAM ON TH On NICAM off 0:NICAM ON TH Off; 1:NICAM ON TH On <Table 2> Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 9 - Only for training and service purposes.
- Page 10 Ultra HF CPT FLAT HF CPT FLAT IRICO CPT FLAT LG CPT Necessary 0:normal mode EW COR Unnecessary 1:corner pin gain up mode Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 10 - Only for training and service purposes.
- Page 11 0: Output without LPF; 1: Output by LPF W/O TXT:0 Unnecessary W/O TXT:0 W/ TXT:1 W/ TXT:1 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 - 11 - Only for training and service purposes.
- Page 12 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 - 12 - Only for training and service purposes.
- Page 13 Clock recovery count level1 (0~127) Unnecessary CKRVCNT2 Clock recovery count level2 (0~127) Unnecessary NICAM ON TH Unnecessary BERSEL Unnecessary AGCEN Unnecessary 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: Trouble Shooting
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 - 14 - Only for training and service purposes. - Page 15 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 - 15 - Only for training and service purposes.
- Page 16 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 - 16 - Only for training and service purposes.
- Page 17 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 - 17 - Only for training and service purposes.
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Page 18: Block Diagram
BLOCK DIAGRAM Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 18 - Only for training and service purposes. -
Page 19: Printed Circuit Board
PRINTED CIRCUIT BOARD MAIN Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 19 - Only for training and service purposes. - Page 20 CONTROL CPT (option) LED+PRE AMP POWER Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 20 - Only for training and service purposes.
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Page 21: Exploded View
EXPLODED VIEW Copyright©2009 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 21 - Only for training and service purposes. - Page 23 SVC. SHEET : 3854VA0196D-S...