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LG 32LH250H Service Manual
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LG 32LH250H Service Manual

LG 32LH250H Service Manual

Chassis : la96c
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LCD TV
SERVICE MANUAL
CHASSIS : LA96C
MODEL : 32LH250H
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL62195519 (1006-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
32LH250H-UB
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 32LH250H

  • 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 : LA96C MODEL : 32LH250H 32LH250H-UB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL62195519 (1006-REV00) Printed in Korea...

  • Page 2: Table Of Contents

    SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ..............9 TROUBLE SHOOTING ................16 BLOCK DIAGRAM.................. 22 EXPLODED VIEW .................. 24 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 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 7: Specification

    Temp : 0 ~ 40 deg Humidity : ~ 80 % Storage Environment Temp : -20 ~ 60 deg Humidity : -85 % Copyright LG Electronics. Inc. All right reserved. - 6 - 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

    Because PTC Download JIG has internal memory, it can save download files using download program (SAP Configuration). Push the START button (4) after file saving, then it execute download. Copyright LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 5. Click “Auto” tab and set as below 6. Click “Run”. 7. After downloading, check “OK” message. filexxx.bin (7) .OK Copyright LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 • ad 00 00 [Enter ADC adj. mode] • ad 00 10 [Adjust 480i Comp1/1080p Comp1/1024*768 RGB] • ad 00 90 End adj. Copyright LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 5.2 COMPONENT input ADC 5.2.1 Component Gain/Offset Adjustment • Convert to Component in Input-source. • Signal equipment displays. - Impress Resolution 480i Copyright LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 - Impress Resolution 480i/1080p/RGB 5.4.4 EDID DATA •Reference: Download is only possible in POWER ON MODE. • HDMI I [C/S: 1DBA] Copyright LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
  • Page 14 •Color Analyzer Matrix should be calibrated using CS-1000 G Cut B Cut Warm R Gain G Gain B Gain R Cut G Cut Copyright LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 (80°~ 100°) - In case of LCD, B/L on should be checked using no signal or Full white Pattern Copyright LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...

  • Page 16: Troubleshooting

    Check Power board or Module P701 18pin : high Check Mstar LVDS output Replace Mstar(IC100) or Main board R812, R813,..., R821 Copyright LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 IC1001 4pin Check IC1005(19",22") Check CVBS signal. Bad Tuner. TU1001 #19 Pin 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 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. - 18 - LGE Internal Use Only Only for training and service purposes...
  • Page 19 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. - 19 - LGE Internal Use Only Only for training and service purposes...
  • Page 20 Replace NTP(Audio AMP) IC500 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. - 20 - LGE Internal Use Only Only for training and service purposes...
  • Page 21 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. - 21 - LGE Internal Use Only Only for training and service purposes...

  • Page 22: Block Diagram

    BLOCK DIAGRAM Copyright LG Electronics. Inc. All right reserved. - 22 - LGE Internal Use Only Only for training and service purposes...
  • Page 23 Half-NIM Tuner Copyright LG Electronics. Inc. All right reserved. - 23 - LGE Internal Use Only Only for training and service purposes...

  • Page 24: 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. - 24 - LGE Internal Use Only...
  • Page 25 PStoPDF trial version. http://www.oakdoc.com SIDE_AV R,G,B PC&DDC L1208 BG2012B080TF 008:D26 SIDEAV_CVBS_IN JK1202 PPJ218-01 C1227 +3.3V 100pF [YL]O_SPRING R1254 [YL]CONTACT 0 0 9 : P 2 8 SIDEAV_SW [YL]U_CAN C1219 100pF +5V_ST_PTC [WH]C_LUG L1206 BG2012B080TF 008:R33 [WH]U_CAN SIDEAV_L_IN C1224 100pF D1213 [RD]O_SPRING 5.6V L1207...
  • Page 26 PStoPDF trial version. http://www.oakdoc.com EDID 12V_DCDC HDMI1 +3.5V_ST 2010_PWR 2010_PWR L4005 D4000 22uH MBRA340T3G C4035 22uF +3.3V_ST 2010_PWR IC4003 C4034 2010_PWR 100pF BD9306AFVM Q4008 5V_HDMI_1 R556 Si4800BDY 2010_PWR R4040 R513 Q504 2SC3052 C4023 008:D37 100pF COMP C4013 R4030 0 . 1 u F R552 +5V_GENERAL 5V_HDMI_1...
  • Page 27 PStoPDF trial version. http://www.oakdoc.com EXTERNAL SPEAKER OUT +1.8V_AMP & +24V_AMP +5V_GENERAL L300 CB3216PA501E C2143 C2144 10uF 0 . 1 u F IC300 TPA6011A4PWPRG4 PGND_1 ROUT+ IC601 SHIELD_PLATE 2SA1530A-T112-1R ROUT- SE/BTL R2235 Q1104 AZ1117H-1.8TRE1(EH13A) +1.8V_AMP SUB_MUTE T_TERMINAL2 008:AB19;003:AC20 PVDD_1 HP/LINE B_TERMINAL2 R2231 INPUT ADJ/GND...
  • Page 28 +3.5V_ST PStoPDF trial version. http://www.oakdoc.com +5V_ST_PTC +5V_ST_PTC +5V & PANEL POWER S t a n d - b y + 3 . 3 V 4.7K +3.5V_ST R705 R411 PWR ON 2010_PWR L721 RT1P141C-T112 L701 +5V_ST 5V_ST BG2012B121F R771 C795 POWER_ON_DELAY +3.3V_ST 220uF R706...
  • Page 29 PStoPDF trial version. http://www.oakdoc.com LGDT3305 TUNER +5V_TU L1003 C1007 C1005 C1011 C1013 C2250 C1008 0 . 1 u F 0 . 1 u F 10uF 220uF 220uF 0 . 0 1 u F TU1001 +3.3V_AVDD_PVSB TDVW-H104P +5V_TU 1N4148W R1074 D1000 NC_1 C1071 NC_2...
  • Page 30 PStoPDF trial version. http://www.oakdoc.com 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 1G_HYNIX 512M_HYNIX IC100 0 . 1 u F 1000pF HY5PS1G1631CFP-S6 LGE3369A (SATURN6 NON RM) H5PS5162FFR-S6C VREF...
  • Page 31 PStoPDF trial version. http://www.oakdoc.com LVDS P801 TF05-51S +3.3V_ST R862 Except FHD P800 FI-X30SSL-HF 008:AR30;007:O14 LVDS_SEL R841 PWM_DIM R840 OPC_OUT R842 OPC_EN R843 R858 PWM_DIM 008:AF11;004:M20;007:Z21 R857 OPC_OUT 004:M19;007:Z21 TXA4+[0] TXA4-[1] LVDS_TXA3+ TXA3+[2] R847 TXA1-[9] LVDS_TXA3+ LVDS_TXA3- Except FHD TXA3-[3] R848 TXA1+[8] LVDS_TXA3- Except FHD...
  • Page 32 +3.3V +3.3V_VDDP PStoPDF trial version. http://www.oakdoc.com 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 33 PStoPDF trial version. http://www.oakdoc.com b _ L A N M P I p i n 3 p o w e r c o n t r o l UPDATE SW900 SKHMPWE010 R2324 R2335 5VST UART_SWA bLAN_CTRL_PTC_1 012:AA5 R2332 R2325 bLAN_CTRL_PTC_0 R2291 012:O6 R2333...
  • Page 34 PStoPDF trial version. http://www.oakdoc.com FPGA 3 . 3 V _ P r o i d i o m +VCCINT_1.5V FPGA POWER +VCCINT_1.5V +3.3V 3 . 3 V _ P r o i d i o m MLB-201209-0120P-N2 MLB-201209-0120P-N2 L1231 L1227 L1230 0 1 0 : T 2 5 ;...
  • Page 35 PStoPDF trial version. http://www.oakdoc.com IR & LED & CONTROL P1100 12507WS-12L +5V_ST_PTC R1104 LED_B 009:R32 LED_GR R1105 LED_R LED_AM 009:R33 L1103 D1101 D1102 BG2012B080TF R1115 UDZS5.1B UDZS5.1B 1000pF 1000pF 5.1V KEY_CTL_0 C1102 C1104 5.1V 009:AD29 L1104 R1116 KEY1 BG2012B080TF KEY_CTL_1 009:AD28 KEY2 +5V_ST_PTC...
  • Page 36 PStoPDF trial version. http://www.oakdoc.com UART R925 +5V_ST_PTC +5V_ST_PTC Q903 2SC3875S(ALY) S e r i a l P o r t R923 Q902 2SC3875S(ALY) R917 012:C9 PTC_TX_1 +5V_ST_PTC +5V_ST_PTC Q904 +5V_ST_PTC 2SC3875S(ALY) +5V_ST_PTC R924 +3.3V_ST IC902 Q901 ST3232CDR 2SC3875S(ALY) P900 C907 KCN-DS-1-0088 R912 0 0 9 : A F 2 5 ;...
  • Page 37 PStoPDF trial version. http://www.oakdoc.com USB JACK (DOWN LOAD ONLYU) +3.3V +5V_EXT IC1304 MIC2009YM6-TR VOUT ILIMIT C2248 C2251 C2252 USB_CTL FAULT/ ENABLE 10uF 47uF 47uF R2514 USB_OCD 008:AR34 USB_DM 008:AR34 USB_DP ADMC5M03200L ADMC5M03200L U S B + 5 V O v e r C u r r e n t P r o t e c t i o n - - > U S B J a c k THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
  • Page 38 PStoPDF trial version. http://www.oakdoc.com B-LAN JIG WAFER B-LAN POWER BLAN 5VST_JIG P1405 BLAN CHECK 5VST 5VST BLAN 12505WS-15A00 TU1002 L1404 MLB-201209-0120P-N2 BLAN BLAN TMMB-H001P(W/O Tuner) Q507 bLAN_CHECK_5V P1400 AO4813 YFDW254-06S 014:Y21 5VST_JIG BLAN CHECK RF_OUT[NC] D2_2 C801 R2568 C802 GND_1 R2529 MPI IN 2 .

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32lh250h-ub