White Balance Adjustment; Equipment Connection Map; W/B Adj. Objective & How-It-Works; Command Format - LG 65UH950V Service Manual

# HDMI3
(1) HDMI Deep Color OFF (C/S: 0x9F, 0X62)
(2) HDMI Deep Color ON (C/S: 0x9F, 0Xb8)
Checksum(HDMI 1/2/3)
FFh (Checksum)
Input
Deep Color : OFF
HDMI1 0x9F
HDMI2 0x9F
HDMI3 0x9F
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
FFh (Checksum)
Deep Color : ON
0x82 0x9F 0XD8
0X72 0x9F 0XC8
0X62 0x9F 0XB8

5. White Balance Adjustment

5.1. White Balance Adjustment
5.1.1. Overview
(1) W/B adj. Objective & How-it-works
1) Objective: To reduce each Panel's W/B deviation
2) How-it-works : When R/G/B gain in the OSD is at 192, it
means the panel is at its Full Dynamic Range. In order
to prevent saturation of Full Dynamic range and data,
one of R/G/B is fixed at 192, and the other two is
lowered to find the desired value.
3) Adjustment condition : normal temperature
① Surrounding Temperature : 25 ± 5 °C
② Warm-up time: About 5 Min
③ Surrounding Humidity : 20 % ~ 80 %
5.1.2. Equipment
(1)Color Analyzer: CA-210 (LED: CH 14 / OLED: CH 17)
(2) Adj. Computer(During auto adj., RS-232C protocol is
needed)
(3) Adjustment Remote control
(4) ) Video Signal Generator MSPG-925F 720p/216-Gray
(Model:204, Pattern:49)
→ Only when internal pattern is not available
* Color Analyzer Matrix should be calibrated using CS-100.

5.1.3. Equipment connection MAP

5.1.4. Adj. Command (Protocol)

(1) Command Format

START 6E A 50 A LEN A 03 A CMD A 00 A VAL A CS A STOP
- LEN: Number of Data Byte to be sent
- CMD: Command
- VAL: FOS Data value
- CS: Checksum of sent data
- A: Acknowledge
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX]
▪RS-232C Command used during auto-adj.
RS-232C COMMAND
CMD ID DATA
wb 00 00
wb 00 01
wb 00 10
wb 00 1f
wb 00 20
wb 00 2f
wb 00 ff
- 20 -
Explanation
Begin White Balance adj.
Begin 10% window pattern brightness
check (OLED only)
Gain adj.(internal white pattern)
Gain adj. completed
Offset adj.(internal white pattern)
Offset adj. completed
End White Balance adj.
(internal pattern disappears)
LGE Internal Use Only