LG 27BL85U Service Manual Download Page 17

Page: 17 / 19

-17 -

Only for training and service purposes

LGE Internal Use Only

5. No Sound(H/P)

Replace Main Scaler

(IC200)

Check the Input source.

Check the sound setting in

Setting like a right image.

Check JK501 Soldering

Do re-soldering

Check Cable status for

Damaged or Open

Connector

Summary of Contents for 27BL85U

Page 1: ...nternal Use Only CHASSIS MODEL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL SERVICE MANUAL LED MONITOR SERVICE MANUAL LM8BA 27UL850 27BL85U P NO MFL69413817 1811 REV00 ...

Page 2: ...nics Inc All rights reserved Only for training and service purposes CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 4 Firmware Upgrade Method 8 TROUBLE SHOOTING GUIDE 19 BLOCK DIAGRAM 14 EXPLODED VIEW 15 DISASSEMBLY 16 CONTENTS ...

Page 9: ...tronics Inc All rights reserved Only for training and service purposes Assembly Disassembly Disassembly method 1 1 Tool 2 Pull the button downward and disassembly the stand 3 Remove screw 4ea 1 Put the set on a soft cloth ...

Page 10: ...G Electronics Inc All rights reserved Only for training and service purposes 5 Disassembly the FFC Lamp control D and hera 6 Remove screw 3eaandChassis assy 4 Open the Back cover with jig first point is middle of top ...

Page 11: ... 11 Copyright LG Electronics Inc All rights reserved Only for training and service purposes 9 LCD Module 7 Reversed Head assyand Disassembly deco 8 Reversed Head assyand Remove screw 9ea ...

Page 12: ... Use Only 1 NO POWER N Check Power connector OK Replace Adapter Y N Y Y N Replace IC601 Recheck N Y Replace IC202 Flash Memory Y Check JP400 JP401 Voltage Level 19V Check IC601 Output Voltage Level 3 3V Check IC405 IC403 IC404Output Voltage Level 5V 1 8V 1 15V Replace IC405 IC403 IC404 Recheck Check X200 Clock 12MHz Replace X200 ...

Page 13: ...rposes LGE Internal Use Only 2 NO SCREEN ON Replace Cable N Module Back Light On Y N N Replace IC402 Recheck Y N Replace T Con Board or Module Y Check IC 601 Replace Main Scaler IC Check Panel Power 10V JP209 Check WLED_ENABLE High IC601 Pin 27 Check e DP Cable for Damage or Open Conductors ...

Page 14: ...l Use Only 3 No Video HDMI Check signal format and resolution Is it supported Check JK100 or JK101 for proper connection or Damage Replace Connector Y N Check HDMI 5V from Source PC JK100 and JK101 Pin No 18 Re Download EDID Data Y N Y Check HDMI Cable for Damage or Open Connector Y Replace Main Scaler IC200 ...

Page 15: ...nd service purposes LGE Internal Use Only 4 No Video DP Replace Main Scaler IC200 Check signal format and resolution Is it supported Check JK801 for proper connection or Damage Replace Connector Y N Check AUX Signal R137 or R142 Y Y Check DP Cable for Damage or Open Connector Y ...

Page 16: ...service purposes LGE Internal Use Only 4 No USB C Replace Main Scaler IC200 Check input signal format Is it supported Check JK801 for proper connection or Damage Replace Connector Y N Check AUX Signal R876 or R890 Y Y Y Check USB CCable for Damage or Open Connector N ReplaceIC801 ...

Page 17: ...aining and service purposes LGE Internal Use Only 5 No Sound H P Replace Main Scaler IC200 Check the Input source Check the sound setting in PC Setting like a right image Y N Check JK501 Soldering Do re soldering Y N Y Check Cable status for Damaged or Open Connector Y ...

Page 18: ...raining and service purposes LGE Internal Use Only 6 No Sound Speaker Check the Input source Check Speaker Cable is connected Connect the Cable correctly Y N Replace Speaker and Check the status Replace Main Scaler IC200 N Y Check Cable for Damaged or Open Connector Y ...

Page 19: ......