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LG 32BL95U Service Manual
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LG 32BL95U Service Manual

Chassis: lm80g
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LED MONITOR
SERVICE MANUAL
SERVICE MANUAL
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL70211509 (1810-REV00)
P/NO :
Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
LM80G
32BL95U
CONFIDENTIAL

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Summary of Contents for LG 32BL95U

  • Page 1 SERVICE MANUAL CHASSIS : LM80G MODEL : 32BL95U CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : P/NO : MFL70211509 (1810-REV00) Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 2: Table Of Contents

    SAFETY PRECAUTIONS ................ 3 SPECIFICATION ..................4 ADJUSTMENT INSTRUCTION ..............7 DISASSEMBLY ..................17 BLOCK DIAGRAM ................... 21 EXPLODED VIEW ..................22 TROUBLE SHOOTING GUIDE .............. 23 - 2 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 3: Safety Precautions

    When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver is returned to the customer. - 3 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 4: Specification

    P/No Specification 31.5”,Nano-IPS,UHD,4side Edge 13 Applying module list EAJ64608201 LM315WR2-SSA1 EAJ64608201 LM315WR2 SSA1 Maker : LG Dis p la y Maker : LG Display - 4 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 5 66.66 4000 3840 3840 x 266.64 2160 V(Lines) 2222 2160 H(Pixels) 133.32 4000 3840 3840 x 2160 V(Lines) 2222 2160 : DP/USB-C/TBT Preferred timing. - 5 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 6 H orizontal Vertical m ode frequency frequency (Preset M ode) (KH z) (H z) Pass 480P 31.5 Pass 720P Pass 1080P 67.5 Pass 2160P - 6 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 7: Adjustment Instruction

    Update serial number in EDID of HDMI1. ☞ Caution: Never connect HDMI Cable when execute NVRAM Init and AC On at first for downloading HDMI EDID automatically. - 7 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 8 Write HDCP Key into EEPROM by using DDC2AB protocol & HDCP2.2 Adjustment Jig equipment. If error is occurred, try to write again. After download HDCP key, send command ‘0xE6 00 00’ for loading RAM memory correctly. - 8 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 9 10~25min 25~40min 40min~ 0.318 0.318 0.317 0.316 0.314 0.313 0.339 0.338 0.337 0.334 0.332 0.329 Save Warm(6500K) Color by commanding COLOR SAVE Command code. - 9 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 10 3) Check DPM operation refer to the below table. Operating Condition Sync (H/V) or Video EUT (MSPG6100) LED(SET) Wattage(W) Sleep mode Off/Off Off mode - 10 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 11 Language English Depend on the sale region SMART ENERGY SAVING General Power LED Depend on the sale region Off (Others) Automatic Standby 4H (Europe) - 11 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 12 CMD : Command language that monitor executes. c. VAL : FOS DATA d. CS : Dada’s CHECHSUM that transmit e. DELAY : 50MS f. A : Acknowledge - 12 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 13 FF:ON / 00:OFF 0xD0 DisplayPort Input Select 0x90 HDMI1 0XD2 SYSTEM RESET Restart System 00:English, 0x00 ~ 01: German Select Language 0x0F 02: French 03: Spanish - 13 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 14 PROM Sub Address(00~FF) Data : Write data Delay : 20ms 6.5.2. Command Set Adjustment contents CMD(hex Explanation EEPROM WRITE 16-Byte Write (84+n) n-byte Write - 14 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 15 Read E 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 START STOP - 15 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 16 L : 0x00,0x10,….0x70 6.6.5 EDID Read DDC2B Command.(A0/A1) START START Data1 . . . Data128 STOP - 128 Byte transfer of EDID Buffer of MICOM - 16 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 17: Disassembly

    DISASSEMBLY Fig.1 Place the monitor’s screen face down Fig.2 Disassemble the Stand body with pulling down the button. - 17 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 18 Fig 3 Remove the Screw(4EA) and disassemble the back cover Start Point Start Point Fig 4 Disassemble the back cover (Latch Type) . - 18 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 19 Fig 5 Remove thermal pad(1EA), EMI Tape(2EA) Fig.6 Remove the side cover Fig.7 Disassembly the LED Cable , Control Assemble (Latch Type) , FFC cable and Speaker - 19 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 20 Fig. 8 Disassembly the screws between Middle(19)/Rear Frame(4) and Module - 20 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 21: Block Diagram

    BLOCK DIAGRAM - 21 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 22: 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. -22 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 23: Trouble Shooting Guide

    Check IC705 Output Replace IC705 & Voltage Level (2.5V, 1.2V) Recheck Check X100 Clock Replace X100 27MHz Replace IC107 Flash Memory - 23 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 24 P300 (#9, 10, 36, 37) Check FFC Cable for Damage or Replace FFCable Open Conductors Replace T-Con Board or Module - 24 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 Check IC102 AUX Signal Replace the IC102 (#J1,H1) Check IC103 AUX Signal Replace the IC103 (#3,4) Replace the G-SYNC Module - 25 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 26 Check IC101 AUX Signal Replace the IC101 (#29,30) Check IC103 AUX Signal Replace the IC103 (#3,4) Replace the G-SYNC Module - 26 - Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 <LED Driver Block> C117 <LEFT SIDE> 100pF <RIGHT SIDE> 100V D118 P101 P102 MBRD10U100CT 12507WR-H10G 12507WR-H10G 171111 LGR +5V_LED_DRIVER +20V +5V_STANDBY JP118 JP114 To prevent 3216 type crack issue, LEFT_LED_8 RIGHT_LED_7 D101 Change Cap size (3216 --> 2012) L100 MBRD10U100CT SB1280M-220 22uH JP105...
  • Page 28 +3.3V_SCALER C221 10uF +5V_STANDBY +3.3V_NORMAL IC100 IC100 DISPLAY PORT Mstar Request C206 BU200 MST9U03V4 MST9U03V4 R247 0.22uF 170727 R285 R295 PKM13EPY-4002-B0 R233 JK200 DPT21C-20BM1YN10 JP230 NC_74 RESET C207 C212 R296 NC_75 C215 +5V_STANDBY 20pF ML_LANE_3- X200 20pF JP231 0.1uF DP_RX3N NC_76 12MHz AD36...
  • Page 29 DDR3(2Gb/1Gb x 4) VTT_0.75V +1.5V_DDR_S DDR_AB_VREF +1.5V_DDR_S DDR_CD_VREF R1016 R1057 IC100 MST9U03V4 IC1000 R1017 C1037 C1040 IC1004 R1058 C1102 C1104 0.1uF 1000pF IC1005 IC1007 0.1uF 1000pF NT5CB64M16GP-FL NT5CB64M16GP-FL NT5CB64M16GP-FL NT5CB64M16GP-FL C1000 DDR_AB_VREF AN20 R1000 AB_TMA0 CD_TMA0 DDR_CD_VREF DDR_CD_VREF 0.1uF A_A[0] B_A[0] DDR_AB_VREF AR17...
  • Page 30 IC100 +3.3V_SCALER +0.95V_VDDC AVDD_DPRX MST9U03V4 AVDD_DPRX L2009 BLM15PX121SN1 C2047 C2062 C2075 C2090 C2100 VDD_1 AVDD_DPRX_1 SCALER_GND 22uF 10uF 0.1uF 0.1uF 0.1uF VDD_2 AVDD_DPRX_2 AVDD33 VDD_3 VDD_4 AVDD33_4 AVDD_HDMIRX L2010 VDD_5 BLM15PX121SN1 VDD_6 AVDD_EDPTX_2 AA27 VDD_7 AVDD_EDPTX_1 C2056 C2072 C2084 AVDD_HDMIRX 22uF 0.1uF 0.1uF...
  • Page 31 AUDIO AMP: Full Range MODULE-eDP(4K) P502 IC100 05030HR-H30C1(G) MST9U03V4 +3.3V_AMP +20V_AMP L501 BLM15PX121SN1 HP_NMUTE GPIO_A0/MUTE R523 R527 L503 4.7K FP_I2S_BCLK GPIO_A1/AUBCK BLM15PX121SN1 P500 FP_I2S_DATA GPIO_A2/AUSD0 R503 120-ohm 250A1-WR-H04M C512 10uF AMP_3.3V_ON GPIO_A3/AUSD1 C517 Idc: 2.4A AMP_RESET_N 22000pF L504 AMP_RESET_N GPIO_A4/AUSD2 JP505 10.0uH AE36...
  • Page 32 PD,USB HUB POWER MULTI POWER Switch USBPD_20V +20V (5A) L600 UBW2012-121F (5A) L601 UBW2012-121F Q602 MDD3752 R647 C643 C661 C662 +3.3V_NORMAL R648 R642 170825 LGR 4.7K FET Change for improvemnet thermal R645 4.7K Q601 USB DownPort VBUS Power MULTI_PWR_ON MMBT3904(NXP) 5V/1A(Max)X2ea = 2A(Max) R646 4.7K...
  • Page 33 3.3V_Normal DC Jack 20V to 3.3V_SCALER R705 +3.3V_NORMAL 100K +20V +3.3V_SCALER JK700 DS439-F01T1BA-A +20V L708 R700 BLM15PX121SN1 100K JP701 120-ohm +3.3V_SCALER Q700 Vout(3.37V) = 0.8 X (1+R1/R2) JP702 IC701 C749 SSM3J332R C700 C701 C739 68uF 0.1uF 4.7uF 68uF MP2315S Idc: 4.2A 105C 105C R728...
  • Page 34 PD Controller for TBT A port (TBT INPUT) PD SPI De-bug POINT 1.CLK De-bug TYPE-C_TBTA_VBUS 2.MOSI USBPD_20V P801 3.MISO 12507WS-06L 4.CS 5.GND 6.GND C802 C808 TBT_EE_CLK 4.7uF 4.7uF C821 C822 C823 C800 C801 D821 0.01uF 0.01uF 0.01uF 0.01uF SMFB23H TBT_EE_DI USBPD_VBUS TBT_EE_DO R812...
  • Page 35 IC900 IC900 TITANRIDGE DD TITANRIDGE DD R912 100K TBT_SRC_HPD R913 100K R931 DG_PM_S0_EN R914 100K DG_PM_S3_EN TBTA_RX1_P ASSRXP1 TBT_EE_DI EE_DI GPIO_0 GPIO_0 R937 R915 100K TBT_TMU_CLK_OUT TBTA_RX1_N ASSRXN1 DPSNK1_ML0_P TBT_EE_DO EE_DO GPIO_1 GPIO_1 R916 2.2K C900 TBT_TMU_CLK_IN 0.22uF DPSNK1_ML0_N TBT_EE_CS_N EE_CS_N TMU_CLKOUT TBT_TMU_CLK_OUT...
  • Page 36 IC900 IC900 TITANRIDGE DD +3.3V_TBT TITANRIDGE DD +3.3V_TBT PW_VCC0V9_SVR Nearby F18, R6 pin VCC0P9_SVR_PAB_ANA_1 VCC3P3_SVR_1 VCC0P9_SVR_PAB_ANA_2 VCC3P3_SVR_2 C3129 C3141 VCC0P9_SVR_PAB_ANA_3 VCC3P3_SVR_3 VSS_ANA_1 VSS_ANA_67 6.3V 6.3V VCC0P9_SVR_PAB_ANA_4 VCC3P3A 0603 0603 VSS_ANA_2 VSS_ANA_68 VCC0P9_SVR_PAB_ANA_5 VSS_ANA_3 VSS_ANA_69 VCC0P9_SVR_PAB_ANA_6 VCC3P3_S0 VSS_ANA_4 VSS_ANA_70 VSS_ANA_5 VSS_ANA_71 +3.3V_TBT [2017.0918] VCC0P9_SVR_PC_ANA_1...
  • Page 37 TYPE-C CONNECTOR (TBT IN/OUT) TYPE-C CONNECTOR (TBT IN/OUT) TYPE-C_TBTA_VBUS TYPE-C_TBTB_VBUS JK4000 JK4001 USB3.1C(STRAIGHT) USB3.1C(STRAIGHT) JP4000 JP4001 TBTA_TX1_P TBTA_RX1_P TBTB_TX1_P TBTB_RX1_P TBTA_TX1_N TBTA_RX1_N TBTB_TX1_N TBTB_RX1_N AN_CC1_A DG_PA_SBU2 BN_CC1_B DG_PB_SBU2 DG_PA_SBU1 AN_CC2_A DG_PB_SBU1 BN_CC2_B TBTA_RX2_N TBTA_TX2_N TBTB_RX2_N TBTB_TX2_N TBTA_RX2_P TBTA_TX2_P TBTB_RX2_P TBTB_TX2_P 170717 LGR C4000 C4001...
  • Page 38 17.11.06 LGR C4100 After Crystal Matching, 10pF +3.3V_HUB +1.1V_HUB +3.3V_HUB Change cap value (8pF --> 10pF) R4101 C4117 X4100 C4104 C4105 C4106 C4107 C4108 C4109 C4110 C4111 C4112 C4113 C4114 C4115 C4116 24MHz 0.01uF 10uF 0.1uF 0.1uF 0.01uF 0.01uF 10uF 0.1uF 0.1uF 0.1uF...
  • Page 39 Connected to TBT PORT A +3.3V_MUX C4206 2.2uF USB2_DFP_PA_P USB2_DFP_PA_N C4207 0.1uF SEL1 SEL0 +3.3V_MUX Hi-Z Hi-Z C4201 2.2uF HSD1- USB2_DFP_PA_P USB2_DFP_PA_N USB2_UFP_PA_N HSD1+ USB2_PA_P USB2_UFP_PA_P USB2_PA_N USB2_PA_N IC4201 HSD2+ IC4206 FSUSB74UMX USB2_PA_N USB2_TR_PA2A_P TUSB211 12PIN MSL 2 USB2_UFP_PA_P USB2_UFP_PA_N HSD2- USB2_PA_P USB2_PA_P...