LG 21FX4AG Service Manual
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LG 21FX4AG Service Manual

Mc-059b chassis
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P/NO : 3828VD0235Q
All manuals and user guides at all-guides.com
Oct., 2007
Printed in China
e-mail:http://www.LGEservice.com/techsup.html
COLOR TV
SERVICE MANUAL
CHASSIS : MC-059B
MODEL: 21FX4AG/AGE/AGS/AL
MODEL:
21FX4AG/AGE/AGS/AL-TH
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 21FX4AG

  • Page 1 All manuals and user guides at all-guides.com Internal Use Only website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html COLOR TV SERVICE MANUAL CHASSIS : MC-059B MODEL: 21FX4AG/AGE/AGS/AL MODEL: 21FX4AG/AGE/AGS/AL-TH CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. Oct., 2007 P/NO : 3828VD0235Q...

  • Page 2: Table Of Contents

    PRINTED CIRCUIT BOARD ................14 TROUBLE SHOOTING ..................16 BLOCK DIAGRAM ....................20 EXPLODED VIEW....................22 EXPLODED VIEW PARTS LIST..............23 REPLACEMENT PARTS LIST ............... 24 Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 2 - Only for training and service purposes.

  • Page 3: Safety Precautions

    CONDUIT etc. To Instrument’s premature component failure. 0.15uF exposed METALLIC PARTS 1.5 Kohm/10W Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 3 - Only for training and service purposes.

  • Page 4: Description Of Controls

    8. FAVOURITE selects a favorite programme. 9. TURBO PICTURE / SOUND BUTTON (option) selects Turbo picture and sound. Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 4 - Only for training and service purposes.
  • Page 5 COLOURED BUTTONS : These buttons are used for teletext (only TELETEXT models) or programme edit. SSM/ SLEEP FAVOURITE PICTURE SOUND TURBO/ Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 5 - Only for training and service purposes.
  • Page 6 12. TURBO SOUND / PICTURE (option) switches Turbo sound or Turbo picture function on or off. Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 6 - Only for training and service purposes.

  • Page 7: Specifications

    : 0 ~ 40 deg Humidity : ~ 85 % Storage Environment Temp : -20 ~ 60 deg Humidity : ~ 90 % Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 7 - Only for training and service purposes.
  • Page 8 On/ Off Special Language English/ Russia English/ Indonesia/ Thai/ Vietnam East-Asia Input TV/ AV1/ AV2 Child lock On/ Off Etc. Sleep Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 8 - Only for training and service purposes.

  • Page 9: Adjustment

    (When adhering DY, use the electric driver of which turning force is lower than 10Kg/Cm) <Fig. 2> 3-2. Adjustment Preparation 1) Input LG standard signal into 75Ω antenna terminal (or <Fig. 2> PAL-B/G 05CH) 2) Connect the digital multi-meter to terminal(with Hole/ 5-2.
  • Page 10 2) Adjust in CPU OFF Mode by pressing IN-START, MUTE key on the SVC Remote control. After finishing adjustment, press the TV/AV key to exit. Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 10 - Only for training and service purposes.
  • Page 11 NICAM PRE NICAM PRESCALER SCART PRE SCART PRESCALER A2 FM TH A2 PRESCALER FIRST TH MONO THRESHOLD ZWT TH A2 THRESHOLD Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 11 - Only for training and service purposes.
  • Page 12 0 / 1 OVER MO LE OVER.MOD.LEVEL 0 ~ 15 Unnecessary VP52 Tint Through 0 / 1 Unnecessary VP53 TINT TH Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 12 - Only for training and service purposes.
  • Page 13 SECAM Killer circuit enable 0 / 1 Unnecessary OSD CONT OSD Contrast 0 ~ 7 Unnecessary OSD POS OSD Position Unnecessary Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 13 - Only for training and service purposes.

  • Page 14: Printed Circuit Board

    All manuals and user guides at all-guides.com PRINTED CIRCUIT BOARD MAIN Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 14 - Only for training and service purposes.
  • Page 15 All manuals and user guides at all-guides.com SIDE A/V Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 15 - Only for training and service purposes.

  • Page 16: Trouble Shooting

    2. TU / IF SECTION 3. VIDEO PROCESSING In case of influx NOISE - R/C is not operate Maneuver defectiveness Maneuver defectiveness Maneuver defectiveness Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 16 - Only for training and service purposes.
  • Page 17 All manuals and user guides at all-guides.com 4. SMPS PRIMARY SECTION 5. SMPS SECONDARY SECTION Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 17 - Only for training and service purposes.
  • Page 18 All manuals and user guides at all-guides.com 6. VERTICAL SECTION 7. HORIZONTAL SECTION Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 18 - Only for training and service purposes.
  • Page 19 All manuals and user guides at all-guides.com 8. SOUND PROCESSING SECTION 9. CPT DRIVE SECTION Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 19 - Only for training and service purposes.

  • Page 20: Block Diagram

    All manuals and user guides at all-guides.com BLOCK DIAGRAM Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 20 - Only for training and service purposes.
  • Page 21 All manuals and user guides at all-guides.com MEMO Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 21 - Only for training and service purposes.

  • Page 22: Exploded View

    All manuals and user guides at all-guides.com EXPLODED VIEW option P801 Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 22 - Only for training and service purposes.

  • Page 23: Exploded View Parts List

    CPT, A51QDJ420X(G) LG-PHILIPS DISPLAYS 16KHZ BARE AK MASK 6335921006L CPT,ITC A51QDJ420X 75 21INCH FLAT - 4/3 6341921002A BARE CPT ASSEMBLY, LG 21 AK V2 CPT 6334V21009B(6150Z-1228Y) 6334921001A CPT,Bare A51QDJ420X A0MLYG 21INCH FLAT 4/3 1 EAK31802020 CPT,ITC A51CPAA00X04(E) U -0.3G 21INCH...

  • Page 24: Replacement Parts List

    22000PF D 25V 80%,-20% F(Y5V) TA52 0DSGF00019A D604 1N4148 DO35 100V 0.15A 2A 4NSSEC 25UA C242 0CE106DF618 10UF STD 16V 20% FL TP 5 Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 24 - Only for training and service purposes.
  • Page 25 47UF STD 16V 20% FL TP 5 C529 0CE105DK618 1UF STD 50V 20% FL TP 5 C687 0CX2200K409 22PF D 50V 5% SL TA52 Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 25 - Only for training and service purposes.
  • Page 26 150 OHM 1/2 W(7.0) 5.00% TA52 L1203 0LA0102K119 INDUCTOR,AXIAL LEAD 10UH 10% A 2.3 X 3.4 R1222 0RD1500A609 150 OHM 1/2 W(7.0) 5.00% TA52 Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 26 - Only for training and service purposes.
  • Page 27 1.5K OHM 1/6 W 5% TA52 R505 0RD1000F609 100 OHM 1/6 W 5% TA52 R613 0RD0272A609 27 OHM 1/2 W(7.0) 5.00% TA52 Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 27 - Only for training and service purposes.
  • Page 28 82 OHM 1/2 W(7.0) 5.00% TA52 38289U0485G MANUAL, USER IN/EN R884 0RD1201F609 1.2K OHM 1/6 W 5% TA52 38289U0485N MANUAL, MC059B LG FLAT/NEU FR/EN 124D R902 0RD2204A609 2.2M OHM 1/2 W(7.0) 5.00% TA52 3828VA0383J MANUAL,16 GAME/SOCCER EN 018G TX R905 0RD4300F609 430 OHM 1/6 W 5.00% TA52...
  • Page 29 TUNER, TAEW-G013D LGIT MULTI FS VD801 164-003K VARISTOR, SVC621D-14A ILJIN 620V 0% MAY34625701 BOX DWR2 676 524 503 2 COLOR 21FX4 Copyright©2007 LG Electronics.Inc. All right reserved. LGE Internal Use Only - 29 - Only for training and service purposes.
  • Page 30 All manuals and user guides at all-guides.com P/NO: 3854V A0196B - S1 Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 All manuals and user guides at all-guides.com SVC. SHEET : 3854V A0196B-S...

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