LG 34CB88, Service Manual

- 8 -

LGE Internal Use Only

Copyright  © 

  LG Electronics. Inc. All rights reserved.

Only for training and service purposes

- EDID Ver. 1.4 FOR Display Port_8bit (256Byte)

-  EDID Ver. 1.4 FOR Display Port (256Byte) _ PBP Mode

- EDID Ver. 1.4 FOR Display Port_10bit (256Byte)

- EDID Ver. 1.4 FOR Display Port_Free-sync (256Byte)

3.3. Function Check

3.3.1. Check Screen

■ Check input and signal items. (cf. work instructions) 

1. HDMI1/2 (3440 x 1440 @60Hz)

2. DisplayPort1.2 (3440 x 1440 @60Hz) - using PC

4. Total Assembly line process 

4.1. Write HDCP Key

  Write HDCP Key into EEPROM by using DDC2AB protocol 

& HDCP 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.

4.2. White balance adjustment

-  Adjust PRESET Warm(6500K) Color coordinates and 

Gamma calibration .

■ Set the CA-210 for calibration.

■ Input Gamma calibration Pattern (R,G,B, Grey 20 )

■  Set as Warm(6500K) by commanding COLOR_MODE_

CHANGE Command code.

■ Gamma calibration and verify

■ Warm(6500K) color adjustment

Adjust to meet x/y color coordinate as below

x

y

2~4 min

0.318

0.339

4~8 min

0.318

0.338

8~10 min

0.317

0.337

10~25 min

0.316

0.334

25~40 min

0.314

0.332

40 min~

0.313

0.329

Save Warm(6500K) Color by commanding COLOR SAVE 

Command code.

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