LG OK75 Service Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. Stereo System
  5. OK75
  6. Service manual

LG OK75 Service Manual

Hide thumbs Also See for OK75:
Table of Contents

Advertisement

Quick Links

CONFIDENTIAL
MINI HI-FI SYSTEM
SERVICE MANUAL
MODEL: OK75
CAUTION
BEFORE SERVICING THE UNIT, READ THE "SAFETY PRECAUTIONS"
IN THIS MANUAL.
P/NO : AFN78511834
SEPTEMBER, 2018
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only for training and service purposes.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the OK75 and is the answer not in the manual?

Questions and answers

Amit Kumar
May 30, 2025

All voltage chart in mother board

0
1 comments:
Mr. Anderson
May 30, 2025

The voltage chart for the LG OK75 motherboard includes the following values:

- VFD_DAT: 3.14 V
- VFD_STB: 3.14 V
- VFD_CLK: 3.14 V
- DV_3.3V: 3.33 V
- DV_5.0V: 5.05 V
- VF_12V: 12.02 V
- GND: 0.00 V
- 12V: 12.06 V
- OPEN_SW: 3.29 V
- CLOSE_SW: 3.33 V
- LO-: 0.00 V
- LO+: 0.01 V
- P_CTRL: 3.33 V
- SP+, SL+, SP-, SL-: 2.47 V each
- NC: 0.00 V
- PVDD: 48.30 V
- DGND: 0.00 V

These voltages are measured at various connector pins on the motherboard.

This answer is automatically generated

0

Related Manuals for LG OK75

Summary of Contents for LG OK75

  • Page 1 CONFIDENTIAL MINI HI-FI SYSTEM SERVICE MANUAL MODEL: OK75 CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN78511834 SEPTEMBER, 2018 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 2 CONTENTS SECTION 1 ..GENERAL SECTION 2 ..CABINET & MAIN CHASSIS SECTION 3 ..ELECTRICAL SECTION 4 ..MECHANISM (DM19D) Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 3: Table Of Contents

    1. HIDDEN KEY MODE TABLE 2. HIDDEN KEY MODE DESCRIPTION PROGRAM DOWNLOAD GUIDE ........................1-7 FOTA UPDATE STEP USING BT APP ......................1-10 SPECIFICATIONS ............................1-12 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 4: Servicing Precautions

    (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 5 7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin. Armband Resistor (1 M) Resistor Conductive (1 M) Sheet Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 6: Esd Precautions

    ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 7: Hidden Key Mode

    - Entrance Key : Front ‘Stop’ + Remote Control Key ‘ ‘ for 5s. - Exit Key : Auto exit. - Explanation : ‘E2P CLR’ is displayed on the VPD and turn off the power automatically. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 8: Program Download Guide

    2) Copy Firmware file to USB device. NO USB   Insert USB device at USB function. SEARCH  MICOM UP  FINISH  AUTO POWER OFF Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 9 2) Copy Firmware file to USB device. NO USB   Insert USB device at USB function. SEARCH  FIRMWARE  FINISH  AUTO POWER OFF Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 10 2) Copy Firmware file to USB device. NO USB   Insert USB device at USB function. SEARCH  EQDEMOUP  FINISH  AUTO POWER OFF Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 11: Fota Update Step Using Bt App

    Step4 : Confi rm update When touch the “Update” button, user could Select the OK button on the caution message. update the SET fi rmware using FOTA. 1-10 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 12 When fi nishing the fl ash memory writing, pop-up phone, the SET overwrite the fi rmware to fl ash message about fi nish is displayed and the SET memory. auto power off. 1-11 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 13: Specifications

    295 W RMS × 2 (4 Ω at 1kHz, 10% THD) 410 W RMS (3 Ω at 200Hz, 10% THD)  Design and specifications are subject to change without notice. 1-12 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 14 DISASSEMBLY INSTRUCTIONS ........................2-2 EXPLODED VIEWS ............................2-9 1. CABINET AND MAIN FRAME SECTION ....................2-9 2. DECK MECHANISM SECTION ......................2-11 3. PACKING ACCESSORY SECTION ....................... 2-13 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 15: Disassembly Instructions

    Figure 1. Panel Side L/R disassembly - 1 2) Disassemble each of the two screws located inside the handle. Figure 2. Panel Side L/R disassembly - 2 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 16 3) Pull out Cover Side Assembly L/R in the backward direction. Figure 3. Panel Side L/R disassembly - 3 4) Remove the 3 screws. Figure 4. Panel Top disassembly - 1 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 17 6) As shown in the fi gure, remove the Panel Top by pushing the front part and lifting the rear part. Figure 6. Panel Top disassembly - 3 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 18 7) Remove the 9 screws on the Panel Rear. Figure 7. Panel Rear disassembly 8) Bracket MD + Frame Main Screw 4 EA Disassembly Figure 8. Main Set disassembly - 1 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 19 9) Remove the Set LED Connector / Speaker LED Connector / Speaker Network cable. Figure 9. Main Set disassembly - 2 10) Power Cable Disconnection Figure 10. Main Set disassembly - 3 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 20 11) Grasp both sides and pull upward to remove the assembly. Figure 11. Main Set disassembly - 4 12) Complete removal of the Main Set. Figure 12. After detaching the Main Set Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 21 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 22: Exploded Views

    EXPLODED VIEWS 1. CABINET AND MAIN FRAME SECTION CABLE2 260L CABLE7 CABLE6 MAIN CABLE6 CABLE3 260R CABLE5 SMPS CN803 CABLE1 2-10 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 23: Deck Mechanism Section

    2. DECK MECHANISM SECTION (DM19D) 1030 1049 1015 A005 2-11 2-12 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 24: Packing Accessory Section

    3. PACKING ACCESSORY SECTION 825 FM Wire Antenna 826 Filter, Ferrite Core 900 Remote Control 2-13 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 25 2-14 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 26 7. X-FLASH LED UP LEFT P.C.BOARD DIAGRAM ................3-69 8. X-FLASH LED UP RIGHT P.C.BOARD DIAGRAM ................3-70 9. SPEAKER LED P.C.BOARD DIAGRAM ....................3-70 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 27: One Point Repair Guide

    If TH901 or TH903 is open, If BD901 is short-circuit, replace it with a same replace it with a new one. replace it with a new one. specifi cations one. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 28 2200uF/63V 2200uF/63V MED62731209 HS952 25x15 C951 HS955 470P/1KVDC MED61841613 T904 TP915 D951 SF20A400HPI TP914 TP910 R954 C956 TP912 TP913 IC951 TP911 < SMPS circuit > Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 29: Booting When Power On The Set

    (24 MHz) (24 MHz) X501 X501 (32.768 kHz) (32.768 kHz) < MAIN board top view > R5B78 R5B78 PWR_CTRL PWR_CTRL < MAIN board bottom view > Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 30: Vfd Is Not Displayed When Power On The Set

      If the control signals from VFD (DGND, VDD) isn’t output, replace VFD with a new one. 3-1-3. Service hint (Any picture/ Remark) R810(TP841) about Q801 Emitter 30 Vp-p < Waveform of the grid current driver> < TOP FRONT circuit > Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 31: Booting (In Cd/Usb Function)

    4-1-3. Service hint (Any picture/ Remark) IC201 IC201 IC203 IC203 IC202 IC202 IC205 IC205 < MAIN board top view > IC204 IC204 < MAIN board bottom view > Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 32  If there’s no defective component, then replace X500. 4-2-3. Service hint (Any picture/ Remark) X X I IC501 IC501 X500 X500 X500 < MAIN board top view > < Signal waveform > Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 33 3) After change IC503, if It is still not below waveform, check IC501 (DSP IC). 4-3-3. Service hint (Any picture/ Remark) IC503 IC503 < Signal waveform > < MAIN board bottom view > Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 34: Operation Of Md

    IC400 IC400 SP-: pin18 SP-: pin18 IC401 IC401 < Waveform of SP- & SP+ < MAIN board bottom view > for driving SPINDLE motor > Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 35 IC400 SLED-: pin12 SLED-: pin12 IC401 IC401 < Waveform of SLED- & SLED+ < MAIN board bottom view > for driving SLED motor > 3-10 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 36 LO+: pin9 LO-: pin10 LO-: pin10 IC401 IC401 MOT_OPEN MOT_CLOSE < Waveform < MAIN board bottom view > for driving tray open/ close motor > 3-11 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 37 TR+: pin16 IC400 IC400 TR-: pin15 TR-: pin15 IC401 IC401 < MAIN board bottom view > < Waveform of TR± for driving tracking actuator > 3-12 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 38 F+: pin14 IC400 IC400 F-: pin13 F-: pin13 IC401 IC401 < Waveform of F± < MAIN board bottom view > for driving focusing actuator > 3-13 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 39: Sound

    6-1-3. Service hint (Any picture/ Remark) L706 L706 IC702 IC702 L705 L705 L708 L708 IC601 IC601 IC701 IC701 L707 L707 < MAIN board top view > 3-14 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 40 G5 PGPD13 DEBUG_CON_OUT H1 PGPB06(Boot[0]) G4 PGPD14 J1 PGPB07(Boot[1]) H4 PGPD15 J2 PGPB08 J4 VDD12INT J5 VSS12INT < MAIN - CD DSP circuit > 3-15 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 41 IC501 CN502 CN502 USB D-/D+ (CN502 pin1, 2 & pin7, 8) < MAIN board top view > < Waveform of USB D± signal > 3-16 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 42 6-4-3. Service hint (Any picture/ Remark) IC301 IC301 Pin15:DSPI_MCLK Pin15:DSPI_MCLK Pin16:DSPI_LRCK Pin16:DSPI_LRCK Pin17:DSPI_BCK Pin17:DSPI_BCK < AUX function signal fl ow > < MAIN board bottom view > 3-17 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 43 IC301 Pin15:DSPI_MCLK Pin15:DSPI_MCLK Pin16:DSPI_LRCK Pin16:DSPI_LRCK Pin17:DSPI_BCK Pin17:DSPI_BCK Pin1:A_IN_L Pin1:A_IN_L Pin2:A_IN_R Pin2:A_IN_R < TUNER function signal fl ow > < MAIN board bottom view > 3-18 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 44 IC301 IC301 Pin16:DSPI_LRCK Pin16:DSPI_LRCK Pin17:DSPI_BCK Pin17:DSPI_BCK Pin29:PT_L Pin29:PT_L Pin30:PT_R Pin30:PT_R < PORT. IN function signal fl ow > < MAIN board bottom view > 3-19 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 45 IC301 IC301 ICA301 ICA301 Pin15:DSPI_MCLK Pin15:DSPI_MCLK Pin16:DSPI_LRCK Pin16:DSPI_LRCK Pin17:DSPI_BCK Pin17:DSPI_BCK < MIC & RMC board top view > < MAIN board bottom view > 3-20 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 46 B/T Module CN504 CN504 BT_RX, BT_TX IC501 IC601 MCS_BCK MCS_LRCK MIX_DATA0_OUT < Bluetooth function signal fl ow > < MAIN board top view > 3-21 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 47 JK302 IC304 BT_RX, BT_TX IC501 IC601 MCS_BCK MCS_LRCK MIX_DATA0_OUT IC304 IC304 < OPTICAL function signal fl ow > < MAIN board top view > 3-22 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 48: Electrical Troubleshooting Guide

    Is there about 2.5 V at Replace IC941. IC941 pin1? D951 normal? Replace D951. ZD932 normal? Replace ZD932. Power line of main PCB is short. 3-23 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 49 Q901 normal? Replace Q901. D951 normal? Replace D951. Is there about 2.5 V Replace IC951. at IC951 pin1? Power line of main PCB is short. 3-24 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 50 VFD_12V is normal? VFD_3.3V is normal? Check or replace Q203, Q206. VFD_CLK, STB, DO is normal? Check or replace R808, R811, R814. Check or replace VFD. 3-25 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 51: Mcs Part Check

    3.3 VA & 1.2 VA output. Check if IC204 Check and change IC204. have DVCC_3.3V output. X501: 32.768 kHz, X500: 24 MHz Check the operation. 3-26 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 52: Fld Display Check

    DVCC_3.3V of VDD(C806+). Check IC501 -> VFD801 Check data data communication IC501 pin C2, B3, B1. STB/ DATA/ CLK. FLD light on? 3-27 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 53: Pwm Modulation Check

    Check IC601 Check each line resistor output. input data. Check PWM modulator output Replace IC601. Check IC601. FL: Pin48(-),49(+). FR: Pin46(-),47(+). Other output check. 3-28 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 54: Power Amp Part Check

    IC701 pin4, 5/ IC702 pin4, 5, 10, 11. Check IC701, IC702 pin28, 29, 36, 37, 44, 45, 52, 53. Replace the coil. Check output line coil. 3-29 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 55: Tuner / Aux Function Check

    Check Check IC301 Pin8: ADC_3.3V Check CN201 pin1, 2: 12 V. IC301 pin18 Pin13, 14: DVCC_3.3V. output data. IC501 output data. Replace IC501. 3-30 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 56: Tuner Function Check

    Check tuner IC(IC302) Check tuner IC302 operation. voltage (Pin11:AVCC_3.3V). Check IC301 Pin27, 28. Check tuner data line R & C. Refer to function check. 3-31 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 57: Cd Function Check

    Check cristal (X400). Replace cristal (X400). the signal (16.9344 MHz) at IC401 pin49. Check IC501 Replace IC501. input/output and control line. Refer to function check. 3-32 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 58: Double Usb Function

    Check IC501 Display “NO FILE”. Replace IC501. (pin U7, U8/ A7, A8). Check USB audio file in USB device (MP3, WMA file is playable) 3-33 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 59: Waveforms Of Major Check Point

    INPUT/OUTPUT C5B24 INPUT/OUTPUT FLOAT 18pF X500 24MHz X501 32.768KHZ DGND DGND R5B83 ZD506 DF3D6.8MS DGND DGND DGND ZD501 DF3D6.8MS CLOSE TO THE IC PIN 3-34 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 60: Sdram (Ic502)

    VDDQ DQ14 DQ13 VDDQ VSSQ DQ12 DQ11 VSSQ VDDQ DQ10 VDDQ VSSQ LDQM R5B115 UDQM DRM_WEN DRM_CAS DRM_CLK DRM_RAS DRM_CKE DRM_SEL A10/AP DGND DGND 3-35 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 61: Servo (Ic401)

    Fig 3-1. X400: Crystal 16.9344 MHz (IC401 pin31) IC401 R423 R422 C424 RFGND RFGND C431 X400 100nF 100nF R419 16.9344MHz RFGND C445 C444 15pF 15pF RFGND 3-36 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 62: Motor Driver (Ic400)

    Vcc1 LOAD+ VCCD MGND VOTR- LOAD- Vcc2 M_5V VOTR+ SLED+ VOLD- SPIN- VOSL+ MGND SLED- VOLD+ SPIN+ VOSL- VOTK- VOFC- C415 47nF VOTK+ VOFC+ 3-37 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 63: Adc (Ic301)

    GPIO2/IntB/DMCLK TP304 R308 GPIO3/IntC MIC_DATA_IN DGND TP310 R312 DOUT ADC_DATA_IN DVDD TP311 R313 IOVDD DSPI_BCK TP312 R318 LRCK SCKI(3.3V) DSPI_LRCK TP313 R309 DSPI_MCLK DGND 3-38 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 64: Bluetooth (Cn504)

    TP501 L506 BT_ADC_SCL TP502 L507 TP503 BT_TX TP504 L508 BTGND DGND BT_RX TP505 BT_RTS TP506 BT_CTS TP508 RESET BT_RST TP509 TP510 3.3VA L502 DGND 3-39 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 65 3-40 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 66: Wiring Diagram

    8pin 12pin DN LED ICA301 26pin 25pin 10pin 8pin 12pin MIC AMP DRV632 Front Board WIRELESS SMPS [option] MIC1 MIC2 TOP Control Board 3-41 3-42 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 67: Block Diagram

    FRONT : 295W X FRONT : 160W X 2CH WL_SPI_CLK/ Block Option S/Flash WOOFER : 180W X 1CH CS/DO/WP WOOFER : 410W X 1CH 3-43 3-44 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 68: Circuit Voltage Chart

    PVDD : 48.2V AMPLIFIER ICA301 2-VRMS Audio Line Driver VDD:3~3.6V VDD : 3.3V VDD : 3.32V 150 °C Line Driver With Adjustable Gain 3-45 3-46 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 69: Main Capacitor

    VFD_DAT 3.14 3.14 VFD_STB 3.14 3.14 VFD_CLK 3.14 3.14 DV_3.3V 3.33 3.33 DV_5.0V 5.05 5.05 DV_5.0V 5.05 5.05 VF_12V 12.02 12.02 0.00 0.00 3-47 3-48 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 70: Connector Voltage

    CNS102 T(-) 2.46 1.25MM SPRK_D_LD1 F(-) 2.47 0.00 0.00 SW_PDIC 4.69 0.00 0.00 0.00 SPRK_D_LD6 CD_LD 0.02 SPRK_D_LD5 MON_MPD 0.21 SPRK_D_LD4 CD_VR 0.00 3-49 3-50 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 71 0.00 0.00 0.00 0.00 0.00 0.00 FLASH_ BLUE_R_UP FLASH_ BLUE_R_UP CNF104 FRONT  FRONT CNF102 FLASH_ RED_R_UP FLASH_ RED_R_UP 0.00 0.00 0.00 0.00 3-51 3-52 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 72: Printed Circuit Board Diagrams

    PRINTED CIRCUIT BOARD DIAGRAMS 1. SMPS P.C.BOARD DIAGRAM (TOP VIEW) 3-53 3-54 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 73 SMPS P.C.BOARD DIAGRAM (BOTTOM VIEW) NOTE) Warning Parts that are critical with respect to risk of fire or electrical shock. 3-55 3-56 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 74: Main P.c.board Diagram

    2. MAIN P.C.BOARD DIAGRAM (TOP VIEW) 3-57 3-58 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 75 MAIN P.C.BOARD DIAGRAM (BOTTOM VIEW) 3-59 3-60 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 76: Top P.c.board Diagram

    3. TOP P.C.BOARD DIAGRAM (TOP VIEW) 3-61 3-62 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 77 TOP P.C.BOARD DIAGRAM (BOTTOM VIEW) 3-63 3-64 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 78: Jack & Rmc P.c.board Diagram

    4. JACK & RMC P.C.BOARD DIAGRAM (TOP VIEW) (BOTTOM VIEW) 3-65 3-66 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 79: Sparkle Led Up P.c.board Diagram

    5. SPARKLE LED UP P.C.BOARD DIAGRAM (TOP VIEW) (BOTTOM VIEW) 6. SPARKLE LED DOWN P.C.BOARD DIAGRAM (TOP VIEW) (BOTTOM VIEW) 3-67 3-68 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 80: X-Flash Led Up Left P.c.board Diagram

    8. X-FLASH LED UP RIGHT P.C.BOARD DIAGRAM (TOP VIEW) (TOP VIEW) (BOTTOM VIEW) (BOTTOM VIEW) 9. SPEAKER LED P.C.BOARD DIAGRAM (TOP VIEW) (BOTTOM VIEW) 3-69 3-70 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 81 3-71 3-72 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.
  • Page 82 9. Guide ............................... 4-5 10. Deck PCB Assembly ..........................4-5 11. Motor Assembly ............................4-5 12. FFC Cable ............................... 4-5 DECK MECHANISM EXPLODED VIEW (DM19D) ................... 4-6 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 83: Deck Mechanism Disassembly

    1) Turn the Plate to a counterclockwise direction and then lift up the Plate. 2) Remove the Plate. 2-2. Magnet Remove the Magnet. 2-3. Clamp Remove the Clamp. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 84: Tray Disc

    2) Pull the Tray Disc until it is locked. Tray Disc < Figure E > Note • When reassembling place the Guide as Figure E. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 85: Pick Up Assembly

    4) Disconnect the FFC Cable from the Pick Up Base Up/Down in the Hole (H2) of the Base Main Assembly. as Figure G-3. 5) Remove the 4 Rubber Dampers. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 86: Belt Loading

    1) Move the Guide in direction of arrow (A) as 12. FFC Cable Figure H-1. Remove the FFC Cable. 2) Separate the Guide from the Base Main. Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

  • Page 87: Deck Mechanism Exploded View (Dm19D)

    DECK MECHANISM EXPLODED VIEW (DM19D) 1030 1049 1015 A005 Copyright © 2018 LG Electronics Inc. All rights reserved. Only for training and service purposes.

Table of Contents

Save PDF