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LG 37LH200C Service Manual
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LG 37LH200C Service Manual

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LCD TV
SERVICE MANUAL
CHASSIS : LA92Z
MODEL : 37LH200C
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL58436020 (0906-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
37LH200C-UA
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea

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Summary of Contents for LG 37LH200C

  • Page 1 Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LCD TV SERVICE MANUAL CHASSIS : LA92Z MODEL : 37LH200C 37LH200C-UA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL58436020 (0906-REV00) Printed in Korea...

  • Page 2: Table Of Contents

    SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ..............9 TROUBLE SHOOTING ................14 BLOCK DIAGRAM.................. 21 EXPLODED VIEW .................. 22 SVC. SHEET ....................Copyright LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes...

  • Page 3: Product Safety

    An other abnormality exists that must be corrected before the receiver is returned to the customer. Copyright LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...
  • Page 4 Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent potential shock reasons prior to applying power to the Copyright LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Copyright LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Specification

    2) Humidity : ~ 80 % Storage Environment 1) Temp : -20 ~ 60 deg 2) Humidity : 0 ~ 85 % Copyright LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 HDTV 1080P 1920*1080 26.97 23.976 74.176 HDTV 1080P 1920*1080 33.75 30.000 74.25 HDTV 1080P 1920*1080 33.71 29.97 74.176 HDTV 1080P Copyright LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 HDTV 1080P 1920*1080 26.97 23.976 74.176 HDTV 1080P 1920*1080 33.75 30.000 74.25 HDTV 1080P 1920*1080 33.71 29.97 74.176 HDTV 1080P Copyright LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...

  • Page 9: Adjustment Instruction

    - xb 00 60 [Change input source to RGB(1024*768)] - ad 00 10 [Adjust 1024*768 RGB] - ad 00 90 End adj. Ref) ADC adj, RS232C Rrotocol Ver_1.0 Copyright LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 If ADC calibration is failure, “ADC RGB Fail” is displayed. 9) If ADC calibration is failure, after recheck ADC pattern or condition, retry calibration Copyright LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 00 1f -> Gain adj. complete *(wb 00 20(start), wb 00 2f(end)) -> Off-set adj. wb 00 ff -> End white balance auto adj. Copyright LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 Adj. menu 6.White Balance, you can select one of 2 Test-pattern: ON, OFF. Default is inner(ON). By selecting OFF, you can adjust using RF signal in 216 Gray pattern. Copyright LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 1) Push "IN-START" key in service remote controller. 2) Select "Tool Option 1" and Push “OK” button. 3) Punch in the number. (Each model has their number.) Copyright LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...

  • Page 14: Troubleshooting

    P700 20pin : high Check IC704 output voltage Replace IC704. 3.3V Check Mstar LVDS output Replace Mstar(IC100) or Main board. R812, R813,..., R821 Copyright LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 Check IC1002 IC1001 4pin Check CVBS signal. Replace Tuner. TU1001 #19 Pin Check Mstar LVDS output Replace Mstar(IC100) or Main board. Copyright LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
  • Page 16 C113, C108, C114, R146, R149 If no problem, check signal line. Check Mstar LVDS output Replace Mstar(IC100) or Main board. Copyright LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 Check HDMI Signal Replace Main board. If no problem, check signal line. Check Mstar LVDS output Replace Mstar(IC100) or Main board. Copyright LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
  • Page 18 Replace NTP(Audio AMP) Check Connector & P600 Replace connector if found to be damaged. Check speaker resistance Replace speaker. and connector damage. Copyright LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...
  • Page 19 Check SIF buffer signal. Check SIF Signal line. Follow procedure All source audio Replace Mstar(IC100) trouble shooting guide. or Main board. Copyright LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
  • Page 20 Check Mstar exteral speaker out Replace Mstar(IC100) R164,165 or Main board Check IC602 exteral speaker out Replace Sub 15, 22PIN amp(IC602) Copyright LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...

  • Page 21: Block Diagram

    BLOCK DIAGRAM Half-NIM Tuner Copyright LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...

  • Page 22: Exploded View

    X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Copyright Copyright LG Electronics. Inc. All right reserved. LG Electronics. Inc. All right reserved. - 22 - LGE Internal Use Only...
  • Page 23 +5V_ST R,G,B PC&DDC D1223 ENKMC2838-T112 COMPONENT1,AV1 D1242 D1212 ADMC5M03200L L1218 ADMC5M03200L R1205 R1251 5.6V BG2012B080TF 5.6V AV_R_IN COMP1_R_IN IC1200 008:R32 C1250 C1221 008:R33 C1228 R1207 R1206 R1255 AT24C02BN-10SU-1.8 100pF 1000pF 470K 0 . 1 u F JK1200 R1253 R1262 4.7K PPJ228-01 L1217 R1211...
  • Page 24 +3.3V_ST 5V_HDMI_1 R556 R513 Q504 * HDMI CEC 2SC3052 HPD1 008:D37 +3.3V_ST R552 EDID +5V_GENERAL 5V_HDMI_1 C501 R501 0 . 1 u F JP502 R528 R510 DDC_SDA_1 008:D38;002:R22 DDC_SCL_1 R551 IC503 R511 9.1K JP503 008:D37;002:R23 SSM6N15FU R509 002:H14;002:W25 CEC_REMOTE DRAIN1 SOURCE1 R569 008:D39...
  • Page 25 IC601 AZ1117H-1.8TRE1(EH13A) +1.8V_AMP +3.3V INPUT ADJ/GND SPK_L+ 003:AJ15 OUTPUT C646 C647 +24V_AMP C639 22uF L606 0 . 0 1 u F R613 0 . 1 u F D601 DA-8580 R617 100V 5 . 6 EAP38319001 C635 R625 R621 0 . 1 u F 4.7K 3 .
  • Page 26 FROM LIPS & POWER B/D +5V_+12V S t a n d - b y + 3 . 3 V +5V_ST +3.3V_ST +12V L708 CB3216PA501E +5V_ST R705 RT1P141C-T112 +5V_ST L701 L715 Q701 C749 BG2012B121F R771 CB3216PA501E POWER_ON_DELAY R706 0 . 1 u F C758 C756 R703...
  • Page 27 +5V_TU R2232 +3.3V_AVDD_PVSB C1007 C1005 C1011 C1054 C1013 C1008 220uF 1N4148W 0 . 1 u F 0 . 1 u F 10uF 220uF 0 . 0 1 u F R1074 D1000 C1071 C1072 +5V_TU 27pF X1005 27pF R1075 VSB_RESET C1073 L1006 SANYO 25MHz...
  • Page 28 DDR2 1.8V By CAP - Place these Caps near Memory +1.8V_DDR +1.8V_S_DDR BLM18PG121SN1D 0 . 1 u F 0 . 1 u F +1.8V_S_DDR +1.8V_S_DDR +1.8V_S_DDR IC100 0 . 1 u F 1000pF H5PS5162FFR-S6C MSD3159GV H5PS5162FFR-S6C VREF VREF SDDR_D[0] TDDR_D[0] SDDR_A[5] ADDR2_A[5] A_MVREF...
  • Page 29 PANEL_POWER P800 TF05-51S P801 FF10001-30 TXB0-[11] TXB0+[10] HD Except AUO TXB1-[9] R811 PWM_DIM HD Except AUO TXB1+[8] R810 OPC_OUT TXB2-[7] LVDS_TXA3+ TXB2+[6] LVDS_TXA3- TXBC-[5] LVDS_TXAC+ TXBC+[4] LVDS_TXAC- TXB3-[3] TXB3+[2] LVDS_TXA2+ TXB4-[1] LVDS_TXA2- TXB4+[0] R801 LVDS_TXA1+ BIT_SEL R827 LVDS_TXA1- TXA0-[11] TXA0+[10] LVDS_TXA0+ TXA1-[9] LVDS_TXA0-...
  • Page 30 +3.3V +3.3V_VDDP L101 BLM18PG121SN1D +1.26V_VDDC C164 C167 C170 C173 C176 C179 C184 C189 C195 C196 0 . 1 u F 0 . 1 u F 0 . 1 u F 0 . 1 u F 0 . 1 u F 0 .
  • Page 31 USB JACK (DOWN LOAD ONLYU) CONTROL & IR & LED (32"~47") +3.3V_ST +5V_USB_1 E x c e p t 1 9 / 2 2 / 2 6 014:AA21 P1204 12507WS-12L +5V_EXT JK1207 L1205 E x c e p t 1 9 / 2 2 / 2 6 KJA-UB-4-0004 CB3216PA501E R1229...

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37lh200c-ua