LG 34UC88 Service Manual page 9

Insert HDMI Jack which is connected with PC for White Bal-
ance or equivalent device.
→ Total Assembly line should check whether the color
coordinate(x,y) data refer to below table were meet or not.
Color Cool 9,300
Temperature
Medium 8,000
Warm 6,500
Luminance Cool Min : 170
(cd/m²)
Medium Min : 200
Warm Min : 260
*Note : x,y coordinates are drifted about 0.007 after 30 mins
heat-run. So checking color coordinate within 5-min at
total assembly line, consider x,y coordinates might be
up to 0.007 than x,y target of each color temperature.
* Note : Manual W/B process
1) Power off => Power on ('←' 3 times, '→' 1 time and push '
')
2) and push the "←" or "→".
3) In Service Menu.
* When doing Adjustment, Please make circumstance as
below.
4.3. DPM Operation check
■ Measurement Condition: 100 ~ 240 V @ 50/60Hz
(1) Set Input to DVI-D, DisplayPort, HDMI1, HDMI2
(2) Turn off the source device.
(3) Check DPM operation refer to the below table.
Operating Sync (H/V) EUT
Condition or Video (MSPG6100)
Sleep Off/Off Off
mode
Off - -
mode
5. Signal composition for adjustment
5.1. I2C (100K BPS)
5.2. COMMUNICATION START
# Until ACK BIT goes LOW, Repeat it.
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
°K X=0.283 (±0.03) <Test Signal>
Y=0.298 (±0.03) Inner pattern
(255gray,80IRE)
°K X=0.295 (±0.03)
Y=0.305 (±0.03)
°K X=0.313 (±0.03)
Y=0.329 (±0.03)
<Test Signal>
Inner pattern
(255gray,80IRE)
LED Wattage
(SET) (W)
White blinking 1.2W
Off 0.3
5.3. Command form.
Command form use DDC2AB standard communication
protocol.
a. LEN : DATA BYTE number to send.
b. CMD : Command language that monitor executes.
c. VAL : FOS DATA
d. CS : Dada's CHECHSUM that transmit
e. DELAY : 50MS
f. A : Acknowledge
5.4. Screen adjust command (LENGTH = 84)
No. Adjus tment c ontents CMD(h
ex )
1 EEPROM ALL INITIA E4
L
2 EEPROM READ E7
3 EEPROM WRITE E8
4 R GAIN 16
5 G GAIN 18
6 B GAIN
7 BRIGHT(Bac k light) 10
8 FACTORY RESET F0
9
AUTO_COLOR_ADJ
F1
UST
COLOR_MODE_CH
10 F2
ANGE
11 Elaps ed time Clear E9
12 Aging On/Off F3
13 Input Selec t F4
14 SYSTEM RESET F5
15 Selec t Language 68
EDID SN UPDATE 0x 77
APD c ommand 0x F7
Module name
5.5. EEPROM Data Write
5.5.1 Siganl TABLE
LEN : 84h+Bytes
CMD : E8h
ADH : E2PROM Slave Address(A0,A2,A4,A6,A8,AA,AC,AE),
Not 00h(Reserved by Buffer To EEPROM)
ADL : E2PROM Sub Address(00~FF)
Data : Write data
Delay : 20ms
- 9 -
ADR VAL(hex ) Ex planation
00 00 adjus tment Initializ ation
Slav e add At EEPROM Read
Slav e add Data Write data at EEPROM
00 00-64
00 00-64
Tune Gain
00 00-64
00 00-64 Tune Analog Bright
00 0 Fac tory res et
AUTO COLOR Tuning
00 0
0:Auto c olor
00
1 WARM(6500K)
2 COOL(9300K)
Aging off &Clear elapse
00 00
d time
FF:ON / 00:OFF
00 FF/00
1:Dis play Port
00 0x D0
2:HDMI1
0x 90
3:HDMI2
0x 91
4:Thunderbolt (UC98 o
0x D1
nly )
Res tart Sy s tem
00 00
00:Englis h,
00
01: German
02: Frenc h
03: Spanis h
04: Italian
05: Swedish,
06:Finnis h
07: Portugues e
0x 00 ~ 0x 0F
08: Braz il
09: Polis h
0A: Rus s ian
0B: Greek
0C: Uk rainian
0D: Chines e
0E:J apanes e
0F: Korean
0x 01 : HDMI1
0
0x 01~0x 02
0x 02 : HDMI2
0x 00:OFF
00
0x 00~0x 01
0x 01:ON
LM340UW3
LGE Internal Use Only