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LG 38BN75C, Service Manual

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LG 38BN75C Service Manual Download Page 1

P/NO :

CHASSIS :

MODEL :

CAUTION

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

 

SERVICE MANUAL

Copyright © 2016 - 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

CONFIDENTIAL

P/NO : MFL69413822 (2004-REV00)

LED MONITOR

SERVICE MANUAL

LM61A

38WN75C  

38WN75C-BK

38BN75C 

38BN75C-BK

Summary of Contents for 38BN75C

Page 1: ...D THE SAFETY PRECAUTIONS IN THIS MANUAL SERVICE MANUAL Copyright 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes CONFIDENTIAL P NO MFL69413822 2004 REV00 LED MONITOR SERVICE MANUAL LM61A 38WN75C 38WN75C BK 38BN75C 38BN75C BK ...

Page 2: ...Electronics Inc All rights reserved Only training and service purposes CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 4 TROUBLE SHOOTING GUIDE 7 BLOCK DIAGRAM 8 EXPLODED VIEW 9 DISASSEMBLY 10 DOWNLOAD APPENDIX 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: ...roller Factory calibration 7 Input HDMI IN HDMI1 2 2 0 DP IN Display Port 1 4 USB Up N A USB DN N A Up to 5V 0 9A DC H P OUT Audio L R 8 Power Cord Length 1 55 0 05m Refer to Suffix standard and power cord Table Weight 0 17kg 10 Color Black DisplayPort Length N A Weight Color Impedance HDMI Length 1 50m 0 05m P N EAD65185201 Refer to BOM Weight 0 09kg 10 Color Black Impedance 1 CABLE 100Ω 5Ω 2 CON...

Page 5: ...05 864 1 3 37 5 H Pixels 74 25 45 1650 1280 110 40 220 1280 x 720 V Lines 60 750 720 5 5 20 6 H Pixels 83 5 49 702 1680 1280 72 128 200 1280 x 800 V Lines 59 810 831 800 3 6 22 7 H Pixels 108 0 63 981 1688 1280 48 112 248 1280 x 1024 V Lines 60 02 1066 1024 1 3 38 8 H Pixels 146 25 60 00 1800 1600 24 80 96 1600 x 900 V Lines 60 00 1000 900 1 3 96 9 H Pixels 148 50 65 29 2240 1680 104 176 280 1680 ...

Page 6: ...onics Inc All rights reserved Only training and service purposes 2 3 HDMI Video input Factory support mode Horizontal frequency Vertical frequency Preset Mode KHz Hz 1 480P 31 5 60 2 720P 45 60 3 1080P 67 5 60 4 2160P 135 60 ...

Page 7: ... saving Location No IC202 4 LED driver IC Supporting proper voltage and current according to BLU spec Location No IC600 IC601 5 Headphone AMP Amplify audio signal from Main IC and then provide amplifying signal to H P interface Location No IC503 6 USB C PD Controller Set the signal from USB C input and communicate with Source Device Location No IC801 7 Mux IC Separate DP and USB signal of USB C in...

Page 8: ...vice purposes BLOCK DIAGRAM RTD2595LT SPI WQHD Panel 3840 X 1600 HDMI 1 DPRX AUXN HPD HDMI 2 Key1 Key2 LED Driver IC MP3378E Flash Memory 32MBIT TMDS DDC HPD Joystick Control Key DP System EEPROM HP Out TPA6138A WLED_ENABLE WLED_ADIM HDMI 2 0 E DP DP1 2 LED Driver IC MP3378E ...

Page 9: ...parts in this chassis have special safety related characteristics These parts are identified by in the 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 ...

Page 10: ...SSEMBLY 1 Preparation 1 1 Preparation tool jig 1 2 Preparation tool Curved PAD 2 Stand Assembly Separation 1 Lay the set by the Curved PAD in Box 2 Disassemble the Stand after pull the button to down 3 Disassemble the Thumb Screw 4 Remove the Screw 4ea 5 Disassemble the Back Cover By using JIG ...

Page 11: ...l rights reserved Only training and service purposes 6 Disconnect LED Cable Control Assemble Latch Type Bluetooth PCB cable FFC cable Speaker 7 Disconnect Control Assemble BT PCB Latch Type 8 Remove the screw 4EA 9 Remove the screw 18EA ...

Page 12: ...DOWNLOAD Copyright ⓒ 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 13: ...r can not automatically update driver in PC please check whether internet normally operate or the system of Windows can update Step4 Check a installed driver of Mstar ISP USB in device manager Installing a driver port should be shown as USB Serial Port however port number can be different Connect PC using a USB type A And type B Connect HDMI cable to the HDMI1 port of monitor Copyright ⓒ 2016 2017...

Page 14: ...lick Connect button after connecting HDMI cable to HDMI1 port of monitor If monitor can communicate normally ISP the following pop up should be shown as Device Type is MX25L8005 1 Firmware download method Copyright ⓒ 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 15: ... FW 1 Firmware download method Step7 Make sure match the checksum Please ensure that it matches the checksum E3AD between file name E3AD EX UC99_MST9U11Q1_MSTAR_V2 07_E3AD_rev2728_160720 bin Copyright ⓒ 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 16: ...setting option The File Area of erase device should be selected in order to maintain system and factory calibration data 3 Click Run button 1 Firmware download method 3 1 2 Copyright ⓒ 2016 2017 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 17: ...vXXXX_16XXXX bin to the folder of LG_MNT Note The downloading feature does not work properly when using the download file from the company security 4 Please remove the plastic which is marked as DO NOT USE on the monitor s rear 5 Please insert the USB memory stick to the USB 2 0 port Title Monitor F W update feature supports through a SVC USB port For Oversea Product MNT Product Name Monitor Model...

Page 18: ...ent monitor the updating feature will be normally worked 3 User can choice whether or not performing a updating feature by the selection of user Factory Condition Aging On 1 After searching the highest version in LG_MNT folder of USB the updating feature has been automatically performed regardless of the current version of monitor Common When the updating feature is completed monitor will turn off...

Page 19: ...emoved and reconnected after inserting an USB memory stick including FW in the determined folder Note After searching the highest version in LG_MNT folder of USB the recovering feature has been automatically performed After 40 seconds the monitor will be normally recovered by itself Q The power turns off suddenly during updating PD FW under 50 status of progress bar how can I do After turning on t...

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