LG 27MK60TM Service Manual Download Page 22

Page: 22 / 24

TROUBLE SHOOTING GUIDE

First of all, Check whether there is SVC Bulletin in GCSC System for these model.

No Power

No Screen on

- 22 -

Only training and service purposes

Replace Cable

Module Back Light On?

Check IC203

Replace Main Scaler IC

Check Panel Power 5V(JP229)

Check IC101 Output 5V

Replace IC101 &

Recheck

Check Panel Clock

P101(#10,11,22,23)

Check IC203

Repair Main B/D

Check FFC Cable for Damage

or Open Conductors

Check LED Driver FB

(P700 1,6)

Replace T-Con Board or

Module

Replace X201

Check JP100

Voltage Level (19V)

Check Power connector

OK ?

Replace Power Board

Check IC100 Output

Voltage Level (1.1V, 3.3V)

Replace IC100 &

Recheck

Check X201 Clock

14.318MHz

Check IC101 Output

Voltage Level : C128 (5VS)

Replace IC101 &

Recheck

Replace IC201 Flash Memory

Summary of Contents for 27MK60TM

Page 1: ...P NO CHASSIS MODEL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL SERVICE MANUAL P NO MFL62449361 1804 REV00 LED LCD MONITOR SERVICE MANUAL LM8EA 27MK60TM CONFIDENTIAL ...

Page 2: ...ectronics Inc All rights reserved Only training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 4 ADJUSTMENT INSTRUCTION 9 BLOCK DIAGRAM 17 EXPLODED VIEW 18 DISASSEMBLY 19 TROUBLE SHOOTING GUIDE 22 ...

Page 3: ... sensitivity replace it with the specified Reverse plug the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part Any voltage When replacing a high wattage resistor Oxide Metal Film Resistor measured must not exceed 0 75 volt RMS which is corresponds to over 1 W keep the resistor 10 mm away from PCB 0 5 mA Keep wires away from high voltage or high temperature...

Page 4: ... HDMI Length 1 5m 0 05m Shape Detachable Type Color Black Weight 0 091kg 10 Checked OK SET accessory P N EAD0092612 5 CABLE 100Ω 10Ω CONNECTOR 100Ω 15Ω D sub Length 1 5m 0 05m Shape Detachable Type Color Black Weight 0 095kg 10 N A N A Do not Support CABLE 75Ω 5Ω CONNECTOR 50Ω 5Ω N A N A 8 Power Output DC 19V 1 3A 24W Adapter Color Black Weight 154g 10 without vinyl bag Checked OK P N Refer to Suf...

Page 5: ... 628 600 1 4 23 Checked OK 5 H Pixels 49 5 46 875 1056 800 16 80 160 Checked OK 800 x 600 V Lines 75 0 625 600 1 3 21 Checked OK 6 H Pixels 65 0 48 363 1344 1024 24 136 160 Checked OK 1024 x 768 V Lines 60 0 806 768 3 6 29 Checked OK 7 H Pixels 78 75 60 023 1312 1024 16 96 176 Checked OK 1024 x 768 V Lines 75 029 800 768 1 3 28 Checked OK 8 H Pixels 108 0 67 500 1600 1152 64 128 256 Checked OK 115...

Page 6: ...x 768 V Lines 60 0 806 768 3 6 29 Checked OK 7 H Pixels 78 75 60 023 1312 1024 16 96 176 Checked OK 1024 x 768 V Lines 75 029 800 768 1 3 28 Checked OK 8 H Pixels 108 0 67 500 1600 1152 64 128 256 Checked OK 1152 x 864 V Lines 75 000 900 864 1 3 32 Checked OK 9 H Pixels 108 0 63 981 1688 1280 48 112 248 Checked OK 1280 x 1024 V Lines 60 023 1066 1024 1 3 38 Checked OK 10 H Pixels 135 0 79 976 1688...

Page 7: ... RGB X 0 2745 mm Electrical Interface LVDS 2port Color Depth 16 7M colors 6bit A FRC Size Outline mm 534 44 H x306 46 V x2 2 D mm Typ Surface Treatment High resolution adaptable AG 3H hard coating Haze 25 Operating Mode Transmissive mode normally black Back light Unit White LED 24MK600 LGD LM238WF2 SSK1 No Item Content Remark 1 LCD Module Feature Maker LGD Type IPS Active Display Area 23 8 inches ...

Page 8: ...missive mode Normally Black Back light Unit White LED Color Gamut NTSC 72 Standard Measurement Condition z Ambient Luminance Level dark 10 lux z Ambient Temperature Normal Temperature 10 25 z warm up Time More than 30min at Full White Pattern z Input Signal 1920x1080 240Hz z Contrast 70 Brightness Max 100 z 6500K Color Temperature Setting is 6500 K if it s not special specification z Another Spec ...

Page 9: ...cable Internal ADC steps as below On AC power on with Aging mode checking the ADC values and then decide to do or not Read ADC OFFSET and GAIN flags from 0xA8 0x0D 0x0E on NVRAM If those values are not 0xAA on Aging mode must do internal ADC calibration If the result of internal ADC calibration is OK save the ADC result and make the OFFSET and GAIN flags to 0xAA and make the Internal_ADC flag to I...

Page 10: ...ule that is being used in present production by commanding MODULE SELECT Send SYSTEM RESET command to set Module data Input Full White Pattern Video level 700 mVp p 9300K color adjustment This Model is Non TCO Appliance If this TCO 03 spec should be satisfied later refer to below method Adjust to meet x 0 287 0 005 y 0 303 0 005 in 5 minutes x 0 285 0 005 y 0 301 0 005 in 5 30 minutes x 0 283 0 00...

Page 11: ... later refer to below method Option It s another method for 6500K color adjustment at Gumi NT At first check UV If that is under 0 0065 the set is not adjusted If not It is adjust to meet u 0 198 0 0065 v 0 469 0 0065 Adjust to meet Y over 200 cd and confirm If this TCO 0 6 spec should be satisfied later refer to below method 2min 5min 10min 20min 30min X 0 316 0 315 0 313 0 313 0 313 Y 0 334 0 33...

Page 12: ... 4 0 318 0 338 8 0 318 0 337 10 0 317 0 336 25 0 316 0 333 40 0 315 0 331 255 0 313 0 329 a Factory Calibration 2 2 dE Color Temperature 6500k Reference Model 24MP68VQ Note Manual W B process 1 When in DC OFF Condition 2 Press power button 3 times to left direction 3 Press power button once to right direction 4 DC on 5 Press power button up to show Navigation OSD 6 Press power button left to show ...

Page 13: ... Input Input List HDMI1 Aspect Ratio Full wide Picture Picture Mode Custom Picture Adjust Brightness 100 Contrast 70 Sharpness 50 Super Resolution Off Black Level Depending on input signal RGB High YUV Low DFC Off Game Adjust Response Time Fast FreeSync Off Black Stabilizer 50 Cross Hair Off Color Adjust Gamma Mode 2 Color Temp Custom Red 50 Green 50 Blue 50 Configuration Adjust Horizontal 50 Vert...

Page 14: ...ve add At EEPROM Read 3 EEPROM WRITE E8 Slave add Data Write data at EEPROM 4 R GAIN 16 00 00 64 Tune Gain 5 G GAIN 18 00 00 64 6 B GAIN 1A 00 00 64 7 BRIGHT Backlight 10 00 00 64 Tune Analog Bright 8 FACTORY RESET F0 00 00 Factory reset 9 AUTO_COLOR_ADJUST F1 00 0 AUTO COLOR Tuning 0 Auto color 10 COLOR_MODE_CHANGE F2 00 01 6500K 02 9300K 11 Elapsed time Clear E9 00 00 Aging off Clear elapsed tim...

Page 15: ...5 EEPROM Data Write 6 5 1 Siganl TABLE 15 Copyright 2018 LG Electronics Inc All rights reserved Only training and service purposes LEN 84h Bytes STOP A A A A A A Data n A Data 1 A CS START 84 n ADH CMD 03 6E 50 A A ADL Delay 20m CMD E8h ADH E2 PROM Slave Address A0 A2 A4 A6 A8 AA AC AE Not 00h Reserved by Buffer To EEPROM ADL E2 PROM Sub Address 00 FF Data Write data Delay 20ms 6 5 2 Command Set N...

Page 16: ...ead 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 Page 80 FF Read 11 AA 0 5 Page 0 7F Read 12 80 5 Page 80 FF Read 13 AC 0 6 Page 0 7F Read 14 80 6 Page 80 FF Read 15 AE 0 7 Page 0 7F Read 16 80 7 Page 80 FF Read 6 6 3 Use Read 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 wr...

Page 17: ...el 1920x1080 FLASH 8M SPI Control Key Key1 Key2 17 Copyright 2018 LG Electronics Inc All rights reserved Only training and service purposes MP2122A DC DC 3 3V 1 1V MP3378E LED Driver LED Back light Pow 5V er Headphone OUT HDMI 1 RGB HDMI 2 ...

Page 18: ... 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 540 or 200 300 510 500 520 330 400 910 900 920 930 ...

Page 19: ... a pad 4 Disassembly the Screw cover 19 Copyright 2018 LG Electronics Inc All rights reserved Only training and service purposes 2 Use a screw driver to disassembly the Stand base screw 1ea or disassembly the thumb screw 1ea with your hands 5 Disassembly the Stand body screw 2ea ...

Page 20: ...the Jack screw 1ea 8 Use a jig to disassembly the Back cover 9 Disassembly the Cables 10 Disassembly the UDM Screw all 11 Disassembly the Middle cabinet 20 Copyright 2018 LG Electronics Inc All rights reserved Only training and service purposes ...

Page 21: ...S Screw 2ea 21 Copyright 2018 LG Electronics Inc All rights reserved Only training and service purposes 16 Disassembly the Control PCB and Cable 13 Disassembly the DMS 14 Disassembly the PCB screw 2ea 15 Disassembly the PCB ...

Page 22: ... JP229 Check IC101 Output 5V Replace IC101 Recheck Y N Check Panel Clock P101 10 11 22 23 Check IC203 Repair Main B D Y N Check FFC Cable for Damage or Open Conductors Check LED Driver FB P700 1 6 Replace T Con Board or Module Y Replace X201 N Check JP100 Voltage Level 19V Check Power connector OK Replace Power Board Y N Y Check IC100 Output Voltage Level 1 1V 3 3V Replace IC100 Recheck Y N Check ...

Page 23: ...proper connection or Damage Replace Connector Y N Check I2C Signal M200 M201 Re Download EDID Data Y N Y Check Dsub Cable for Damage or Open Connector Y Replace Main Scaler IC201 Check input signal format Is it supported Check HDMI pin JP102 103 104 105 106 for proper connection or Damage Replace Connector Y N Check I2C Signal JP105 106 Re Download EDID Data Y N Y Check HDMI Cable for Damage or Op...

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