LG 32LG500H Service Manual page 14

6. EDID(The Extended
Identification Data) / DDC(Display
Data Channel) download
6.1. Required Test Equipment
1) Adjusting PC with S/W for writing EDID Data.
2) A Jig for EDID Download
3) Cable: Serial (9Pin or USB) to D-sub 15Pin cable, D-sub
15Pin cable, DVI to HDMI cable.
6.2. Setting of device
<Fig.4> Connection Diagram of DDC download
- When input HDMI EDID data through RGB or HDMI jack,
writing 8bits of the data at every turn with 'DDC2B' protocol.
6.3. Data of EDID
(1) DDC data of Analog-RGB
(2) DDC data of Digital-HDMI1
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
Display (3) DDC data of Digital-HDMI2
* Before adjustment of white balance, should be executed the
'color balance adjustment'
7. Adjustment of White Balance
7.1. Required Equipment
- Remote controller for adjustment
- Color Analyzer (CA-210 or same product )
- Auto W/B adjustment instrument(only for Auto adjustment)
- Use inner(SELF) Pattern
7.2. Adjustment of White Balance
(For Manual adjustment)
- Set TV input to RF.
- Operate the zero-calibration of the CA-210, Ch.9.
- Then stick sensor to LCD module surface when you adjust.
- For manual adjustment, it is also possible by the following
sequence.
1) Select white pattern of heat-run mode by pressing power
on key on remote control for adjustment then operate
heat run more than 15 minutes.
2) Enter the White Balance adjustment mode by pressing
the INSTART key twice (White Balance) on R/C.
3) Stick sensor to center of the screen and select each
items using
4) Adjust G Gain / B Gain using
5) Adjust it until color coordination becomes as below.
(Initially, R/G/B gain and R/G/B offset values are fixed as below.)
Red Gain: 80h
Red Offset: 80h
*Target value
Cool
Normal
Warm
6) When adjustment is completed, Exit adjustment mode
using EXIT key on R/C.
- 14 -
D E
/ (CH +/-) key on R/C.
- By controlling G, B GAIN, adjust X, Y target value.
- R Gain fixed at cool, normal, warm mode.
- But, Control the R GAIN, unless it has correct value
Green Gain: 80h
Green Offset: 80h
X Y
0.276 ± 0.002 0.283 ± 0.002
0.285 ± 0.002 0.293 ± 0.002
0.313 ± 0.002 0.329 ± 0.002
F G
/ (VOL +/-) key on R/C.
Blue Gain: 80h
Blue Offset: 80h
Temp (∆ uv)
11000k (0.000)
9300k (0.000)
6500k (0.003)
LGE Internal Use Only