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LG 21FG5RL Service Manual
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LG 21FG5RL Service Manual

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P/NO : MFL42115603
May., 2008
Printed in China
COLOR TV
SERVICE MANUAL
CHASSIS : CW81B
MODEL : 21FG5RL/RG/RLG
MODEL :
21FG5RL/RG/RLG-T4/Z4
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Internal Use Only
website:http://biz.LGservice.com

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Summary of Contents for LG 21FG5RL

  • Page 1 Internal Use Only website:http://biz.LGservice.com COLOR TV SERVICE MANUAL CHASSIS : CW81B MODEL : 21FG5RL/RG/RLG MODEL : 21FG5RL/RG/RLG-T4/Z4 CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. May., 2008 P/NO : MFL42115603 Printed in China...

  • Page 2: Table Of Contents

    CONTENTS ....................2 SAFETY PRECAUTIONS................3 SPECIFICATIONS ..................4 ADJUSTMENT ...................6 TROUBLE SHOOTING ................13 BLOCK DIAGRAM ...................17 PRINTED CIRCUIT BOARD ..............18 EXPLODED VIEW ..................20 Copyright©2008 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©2008 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©2008 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 4 - Only for training and service purposes.
  • Page 5 Language English/ Indonesia/ Thai/ Vietnam East Asia Input TV/ AV1/ AV2/ Component AV2 Option Child lock On/ Off Etc. Sleep Review Copyright©2008 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 5 - Only for training and service purposes.

  • 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 0: NO AV; 1: AV1; 2: AV12 <Table 1> Local Key 0/1/2 0: 4 KEY; 1: 6 KEY; 2: 8 KEY <Table 2> Copyright©2008 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 9 - Only for training and service purposes.
  • Page 10 0 (narrow) ~ 3 (wide) Unnecessary WPL OPE 0: WPL OFF; 1: High operating point; Unnecessary 2:Middle operating point; 3: Low operating point Copyright©2008 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 10 - Only for training and service purposes.
  • Page 11 0: Color ON; 1: Color OFF Unnecessary VXO Free Unnecessary 0: Normal mode;1: VXO free run mode 0: Normal mode;1: VXO Standby mode Unnecessary VXO Stby Copyright©2008 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 11 - Only for training and service purposes.
  • Page 12 CH1 - L TH 0~255 Unnecessary CH2 - M TH 0~143 Unnecessary CH2 - L TH 0~255 Unnecessary BERL 0~255 Unnecessary BERH 0~255 Unnecessary Copyright©2008 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 12 - Only for training and service purposes.

  • Page 13: 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©2008 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 13 - Only for training and service purposes.
  • Page 14 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©2008 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 14 - Only for training and service purposes.
  • Page 15 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©2008 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 15 - Only for training and service purposes.
  • Page 16 R922 D902 17006 16005 Heater Voltage Spot Killer CIRCUIT FR932 C901, R902, D903 e-GUN Dead e-GUN LIFE SPOT & TRAY DECREASE Copyright©2008 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 16 - Only for training and service purposes.

  • Page 17: Block Diagram

    BLOCK DIAGRAM Copyright©2008 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 17 - Only for training and service purposes.

  • Page 18: Printed Circuit Board

    PRINTED CIRCUIT BOARD MAIN Copyright©2008 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 18 - Only for training and service purposes.
  • Page 19 J @ ( Y h e ? ? V 4 @ h ? ? @ 0 Y ? h e ? ? Copyright©2008 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 19 - Only for training and service purposes.

  • Page 20: Exploded View

    X-RADIATION,Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. (option) (option) Copyright©2008 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 20 - Only for training and service purposes.
  • Page 21 P/NO.:3854VA0196D (08.04.14)
  • Page 22 SVC. SHEET : 3854VA0196D-S...

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