LG 34WL550 Service Manual Download Page 1

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P/NO :

CHASSIS :

MODEL :

CAUTION

BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

SERVICE MANUAL

CONFIDENTIAL

P/NO : MFL70211523 (1909-REV00)

LED MONITOR

SERVICE MANUAL

LM83B

34WL550

34WL550-BJ

Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),

publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you

have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual.

The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service

Manual.

Summary of Contents for 34WL550

Page 1: ...AL LM83B 34WL550 34WL550 BJ Any reproduction duplication distribution including by way of email facsimile or other electronic means publication modification copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual The material covered by this prohibition includes...

Page 2: ...ctronics Inc All rights reserved Only training and service purposes CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 4 ADJUSTMENT INSTRUCTION 6 BLOCK DIAGRAM 7 EXPLODED VIEW 8 DISASSEMBLY 9 TROUBLE SHOOTING GUIDE 11 CONTENTS ...

Page 3: ...l shock Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed metallic parts such as antenna terminals phone jacks etc If the exposed meta...

Page 4: ...u Input Exit Function Picture Mode Ratio Smart Energy Saving Six Color Audio Volume Speaker 7 Power Cord Length 1 55 0 05M Refer to Suffix standard and power cord table Weight 0 17kg 10 Color Black 8 Cable DisplayPort Length N A Weight Color Impedance HDMI Length 1 5 0 05 M EAD65185201 Weight 0 11kg 10 Color Black Impedance 1 Cable 100Ω 10 9 Power Adapter Input AC100 240V 50 60Hz 1 1A Output DC 19...

Page 5: ... 768 3 6 29 6 H Pixels 78 75 60 123 1312 1024 16 96 176 1024 x 768 V Lines 75 029 800 768 1 3 28 7 H Pixels 81 62 53 697 1520 1152 64 120 184 1152 x 864 V Lines 60 895 864 1 3 27 9 H Pixels 74 25 45 1650 1280 110 40 220 1280x720 V Lines 60 750 720 5 5 20 10 H Pixels 108 63 981 1688 1280 48 112 248 1280 x1024 V Lines 60 02 1066 1024 1 3 38 11 H Pixels 135 79 976 1688 1280 16 144 248 1280 x 1024 V L...

Page 7: ...l safety related characteristics These parts are identified by in the Schematic Diagram and EXPLODED VIEW It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent Shock Fire or other Hazards Do not modify the original design without permission of manufacturer IMPORTANT SAFETY NOTICE 300 200 540 510 500 330 400 910 900 ...

Page 8: ... Inc All right reserved Only for training and service purposes 8 LGE Internal Use Only Disassemble method Fig 1 Place the monitor s screen face down on a soft cloth Fig 2 Disassemble the Stand body with pulling down the button ඟ Gk ...

Page 9: ...cs Inc All right reserved Only for training and service purposes 9 LGE Internal Use Only Fig 3 Remove the Screw 4EA and disassemble the back cover Fig 4 Disassemble the back cover Latch Type Fig 5 Remove the Speaker 2EA Tape 2EA ...

Page 10: ...ght 2017 LG Electronics Inc All right reserved Only for training and service purposes 10 LGE Internal Use Only Disassemble method Fig 6 Disassemble the FFC cable 2EA cable 2EA Fig 7 Disassemble the Screw 2EA ...

Page 11: ...opyright 2017 LG Electronics Inc All right reserved Only for training and service purposes 11 LGE Internal Use Only Disassemble method Fig 7 Disassemble the Metal frame assy Fig 8 Disassemble the cabinet ...

Page 12: ...Copyright 2017 LG Electronics Inc All right reserved Only for training and service purposes 12 LGE Internal Use Only Disassemble method Fig 9 Disassemble the main PCB and joy stick cover ...

Page 13: ...r Replace X100 N Check C701 Voltage Level 19V Check Power connector OK Replace Adapter Y N Y Check IC703 Output Voltage Level 3 3V Replace IC703 Recheck Y N Check X100 Clock 27MHz Check IC701 702 Output Voltage Level 5V Replace IC701 702 Recheck N Y Replace IC107 Flash Memory Y Y Check IC705 Output Voltage Level 2 5V 1 2V Replace IC705 Recheck N ...

Page 14: ... Driver IC Y N N Check Panel Power 10V L700 Check IC700 Output 10V Replace IC700 Recheck Y N Check Panel eDP AUX P300 9 10 36 37 Check IC300 IC303 Repair Main B D Y N Check FFC Cable for Damage or Open Conductors Check LED Driver Output P601 P602 1 2 5 6 Replace T Con Board or Module Y Check P201 PIN No 69 Replace G SYNC Module N Check WLED_ENABLE High IC601 IC602 27pin Y Replace G SYNC Module N ...

Page 15: ...Replace the G SYNC Module Check input signal format Is it supported Check JK102 for proper connection or Damage Replace the Connector N Y Check HDMI Cable for Damage or Open Connector Y Check I2C Signal EDID Replace the IC100 N Y Check IC102 AUX Signal J1 H1 Replace the IC102 N Y Check IC103 AUX Signal 3 4 Replace the IC103 N Y Y ...

Page 16: ...blish 2017 7 12 LM80B ADJUSTMENT SPECIFICATION 1 11 Revision 0 LG electronics LM83B Adjust Specification 34WK650 29WK600 34BL650 34WL500 29WL500 34WL50S 29WL50S 34WL60TM 34WL600 34WL550 Home Entertainment Company Monitor PC BD Monitor Dev Lab ...

Page 17: ...8 12 24 BW KIM Update RTK scaler model 9 18 12 27 Soogil Lee Update Panel information 10 18 12 28 Xu Changhua Update Panel name 11 19 02 27 Chen Yu Update module selection of 34WL500 29WL500 P11 12 19 02 28 Chen Yu Separate 29WL500 29WK500 module name P11 13 19 03 20 BW KIM Add WL50S informations 14 19 05 13 Ming Lei Combine WL500 and WL50S 15 19 05 21 Wang Xueqian Add Skyworth panel address and a...

Page 18: ...LG ELECTRONICS INC MONITOR DIVISION Establish 2017 7 12 LM80B ADJUSTMENT SPECIFICATION 3 11 Revision 0 LG electronics Note Refer to ECO about detail of revision history ...

Page 19: ...ION Establish 2017 7 12 LM80B ADJUSTMENT SPECIFICATION 4 11 Revision 0 LG electronics CONTENTS 1 Application 2 Designation 3 Main PCB check process 4 Total Assembly line process 5 Shipping condition 6 Signal composition for adjustment ...

Page 20: ...4 Input signal Unit Product Specification Standard 2 5 Reserve after operation Above 5 Minutes Heat Run Temperature at 25 5 C Relative humidity 65 10 Input voltage 100 240V 50 60Hz 2 6 Adjustment equipments Color Analyzer CA 210 or CA 110 DDC Adjustment Jig equipment 3 Main PCB check process SMT APC After Manual Insult executing APC 3 1 ADC Process 34WK650 29WK600 doesn t need ADC process because ...

Page 21: ...te Ascii SN 18byte Read C s of Serial data Read checksum data of 24 byte 4 2 Verify HDCP Key Check OSD with aging on mode or using Master Signal generator with HDCP On and connect to monitor with HDMI 4 3 Set Automatic Standby time a Set Automatic Standby time by adjustment jig equipment Europe 4H Others OFF Command set F7 00 01 for Europe set 4h F7 00 00 for others set 0ff b Check the Automatic S...

Page 22: ...Input Gamma calibration Pattern R G B Grey 20 Set as Warm 6500K by commanding COLOR_MODE_CHANGE Command code Gamma calibration and verify Warm 6500K color adjustment Adjust to meet x y color coordinate as below 2 4 min 4 8min 8 10min 10 25min 25 40min 40min x 0 316 0 315 0 314 0 313 0 313 0 313 y 0 334 0 333 0 331 0 329 0 329 0 329 Save Warm 6500K Color by commanding COLOR SAVE Command code when d...

Page 23: ...than x y target of each color temperature Note Manual W B process 1 Power off Power on Å 3 times Æ 1 time and push 2 and push the Å or Æ 3 In Service Menu 4 4 2 White balance adjustment 29 34WL500 29 34WL50S 34WL60TM 34WL600 34WL550 Adjust PRESET Warm 6500K Color coordinates Set the CA 210 for calibration Set the internal White Pattern by commanding WHITEBALANCE_START Command code Set as Warm 6500...

Page 24: ... 010 Luminance cd Cool Min 170 Test Signal Inner pattern 255gray 100IRE Medium Min 200 Warm Min 230 Note x y coordinates are drifted about 0 007 after 30 mins heat run So checking color coordinate within 5 min at total assembly line consider x y coordinates might be up to 0 007 than x y target of each color temperature Note Manual W B process 1 Power off Power on Å 3 times Æ 1 time and push 2 and ...

Page 25: ...40V 50 60Hz 1 Set Input to DisplayPort HDMI1 HDMI2 2 Turn off the source device 3 Check DPM operation refer to the below table Operating Condition Sync H V or Video EUT MSPG6100 LED SET Wattage W Sleep mode DPM Off Off Off Off 0 5W Off mode Off 0 3W DC Switch Off 5 Shipping condition Æ Make sure to do FACTORY RESET at the final process No Item Content Outgoing Condition 비고 Accessory Refer to BOM A...

Page 26: ... Depending on input signal RGB High YUV Low DFC Off Game Adjust Response Time Normal FreeSync Off Black Stabilizer 50 Cross Hair Off Color Adjust Gamma Mode 2 Color Temp Custom Red 50 Green 50 Blue 50 Six Color Hue Saturation 50 Picture Reset No Sound Volume 30 Maxx Audio On General Language Depend on the sale region Smart Energy Saving Low Power LED Off Automatic Standby Off EU EK PD EW MA 4H HDM...

Page 27: ... f A Acknowledge 6 4 Screen adjust command LENGTH 84 Adjustment contents CMD hex ADR VAL hex Explanation EEPROM ALL INITIAL E4 00 00 adjustment Initialization EEPROM READ E7 Slave add At EEPROM Read EEPROM WRITE E8 Slave add Data Write data at EEPROM R GAIN 16 00 00 32 Tune Gain G GAIN 18 00 00 32 B GAIN 1A 00 00 32 BRIGHT Backlight 10 00 00 64 Tune Analog Bright FACTORY RESET F0 00 00 Factory res...

Page 28: ...Italian 05 Swedish 06 Finnish 07 Portuguese 08 Brazil 09 Polish 0A Russian 0B Greek 0C Ukrainian 0D Chinese 0E Japanese 0F Korean 11 Traditional Chinese EDID SN UPDATE 0x77 0 0x00 Update all input s serial data APD command 0xF7 00 0x00 0x01 0x00 OFF 0x01 set APD time to 4h APD check addrss vaule A6 0XEE OFF 00 ON 04 Module selection Page 0XA8 0X00 F6 0X51 LM340WW1 SSC1 0X03 34WK650 SN 0X03 34BL650...

Page 29: ...end Serial data 75 data Send 24 byte EDID SN 4byte date 2byte Ascii SN 18byte Read C s of Serial data 76 data Read checksum data of 24 byte HDR Max Bright B2 00 00 01 0x00 OFF 0x01 ON APD Auto Power Down OSD 菜单中对应 Automatic standby Apply standard EU region HDMI model EU region Suffix EU EK PD EW MA RU 6 5 EEPROM Data Write 6 5 1 Siganl TABLE LEN 84h Bytes CMD E8h ADH E2 PROM Slave Address A0 A2 A4...

Page 30: ...e to particular address of EEPROM 6 6 E2 PROM Data Read 6 6 1 Signal TABLE 128 Bytes 6 6 2 COMMAND SET No Adjustment contents CMD hex ADH hex ADL hex Explanation 1 EEPROM READ E7 A0 0 0 Page 0 7F Read 2 80 0 Page 80 FF Read 3 A2 0 1 Page 0 7F Read 4 80 1 Page 80 FF Read 5 A4 0 2 Page 0 7F Read 6 80 2 Page 80 FF Read 7 A6 0 3 Page 0 7F Read 8 80 3 Page 80 FF Read 9 A8 0 4 Page 0 7F Read 10 80 4 Pag...

Page 31: ...E2 PROM s specific area as unit of 128 80h byte 84h 6 6 4 EDID Write EEPROM access by using DDC2B protocol 1 Byte write L 0x00 0x7F D data 8 byte write L 0x00 0x10 0x70 6 6 5 EDID Read DDC2B Command A0 A1 128 Byte transfer of EDID Buffer of MICOM STOP STOP A A A A A L L A0 A0 Data8 D Data1 START START A STOP A 00 A0 START A A CS A Data1 A1 START Data128 A A ...

Page 32: ...B C R132 10K R100 10K JK100 1 YKF45 7058V for 1 2T HQ 14 NC 13 CEC 5 DATA1_SHIELD 20 SHIELD 12 CLK 11 CLK_SHIELD 2 DATA2_SHIELD 19 HPD 18 5V_POWER 10 CLK 4 DATA1 1 DATA2 17 DDC CEC_GND 9 DATA0 8 DATA0_SHIELD 3 DATA2 16 SDA 7 DATA0 6 DATA1 15 SCL JP110 C102 0 1uF 16V JK101 HDM2LB 19BG2RN3G HDMI1_for 1 6T NT 14 NC 13 CEC 5 DATA1_SHIELD 20 SHIELD 12 CLK 11 CLK_SHIELD 2 DATA2_SHIELD 19 HPD 18 5V_POWER...

Page 33: ...2_SDA DP0_HPD DP_DET PANEL_ON IR R120 100 IR 3 3V_STANDBY R121 0 IR JP1 IR HDMI1_RX0 HDMI1_RX1 HDMI1_RXC HDMI1_RX1 HDMI1_RX2 HDMI1_RXC HDMI1_RX0 HDMI1_RX2 HDMI2_RX1 HDMI2_RX0 HDMI2_RX0 HDMI2_RX1 HDMI2_RXC HDMI2_RX2 HDMI2_RX2 HDMI2_RXC AUD_MCLK DP_RX_SDM R308 0 P205 12507WS 04L SCALER_DEBUG 1 2 3 4 5 IC202 RTD2556UT 1 DDR1_V25 2 VCCK_OFF 3 TXD3P_8B 4 TXD3N_8B 5 TXD2P_8B 6 TXD2N_8B 7 TXD1P_8B 8 TXD1...

Page 34: ...NORMAL C303 10uF 10V RX_33V C302 10uF 10V 3 3V_PVCC ADC_V33 L300 BLM15PX121SN1 L301 BLM15PX121SN1 L302 BLM15PX121SN1 C304 10uF 10V L303 BLM15PX121SN1 HP_AVDD33 AUDIO_VDD33 L304 BLM15PX121SN1 3 3V_LVDS L305 BLM15PX121SN1 TMDS_REXT R304 12K R303 6 2K READY RX_33V L307 BLM15PX121SN1 GDI_11V 1 1V_VCCK_ON 1 1V_ON C315 10uF 10V C316 10uF 10V C318 10uF 10V L308 BLM15PX121SN1 L310 BLM15PX121SN1 1 1V_LVDS ...

Page 35: ...DY 1 1V_OFF_CONTROL R463 100 3 3V_NORMAL R467 10K 3 3V_NORMAL C465 4 7uF 25V 29inch R468 3K 29inch C470 0 1uF 16V 29inch L410 10uH 29inch C466 4 7uF 25V 29inch R470 100K 29inch C471 10uF 10V 29inch R469 100 29inch R472 150K 29inch C472 10uF 10V 29inch C469 0 1uF 16V 29inch R471 15K 29inch IC408 MP2315S 29inch 3 SW 2 IN 4 GND 1 AAM 5 BST 6 EN 7 VCC 8 FB C467 0 1uF 50V 29inch C468 0 1uF 50V 29inch R...

Page 36: ...502 100V BR210 WLED_ADIM WLED_ENABLE C558 0 1uF 50V R570 100 R599 270 1 34inch R575 1K 19V R597 33 34inch C583 10uF 10V 34inch R567 51K L507 33uH C553 4 7uF 25V C554 4 7uF 25V C560 4 7uF 25V R569 0 NO_MOTION R598 100K 34inch R574 100K C571 4 7uF 25V 34inch C572 4 7uF 25V 34inch R593 0 NO_MOTION C562 0 1uF 16V C579 0 1uF 16V 34inch R576 1K R502 1K 34inch R585 100 34inch R561 100 JP519 JP523 JP522 J...

Page 37: ...G121SN1D C716 0 1uF 50V L703 10 0uH C705 0 1uF 16V C727 0 47uF 50V OPT 19V C709 1uF 25V OPT AUD_SCK 3 3V_AMP C700 4 7uF 10V C738 10uF 10V HP_AMP C706 2 2uF 25V C710 2 2uF 25V C725 1uF 10V R767 0 OPT R784 10K HP_AMP R766 15K Q701 SSM3J332R S G D C719 390pF 50V AUD_DATA 3 3V_AMP C702 4 7uF 10V R782 10K R772 10K OPT R777 10K OPT JP706 JP705 C750 1uF 10V HP_AMP AR700 33 HP_AMP R789 47K AR701 33 HP_AMP...

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