LG 37LB1D-UB, Service Manual

Page: 15 / 81

10. ADC-Set Adjustment
10-1. Synopsis
ADC-Set adjustment to set the black level and the Gain to
optimum.
10-2. Test Equipment
Service R/C, 801GF(802B, 802F, 802R) or MSPG925FA
Pattern Generator
(720P The Horizontal 100% Color Bar Pattern output will be
possible and the output level will accurately have to be
revised with 0.7±0.1Vp-p)
10-3. Adjustment
(1) ADC 480i Component1 Adjustment
Check the connection Component1 to the Test Equipment
(1) Select Component1 as the input with 100% Horizontal
Color Bar Pattern(HozTV31Bar) in 480i Mode and
select ‘Normal’ in screen.
(2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘4. ADC 480i Comp1’.
Pressing the Enter Key to adjust with automatic
movement.
(3) When the adjustment is over, 'ADC Component1
Success’ is displayed.
(4) If the adjustment has errors, 'ADC Configuration Error’
is displayed. And error massage(‘Component Not
Connection’ or ‘Change Format to 480i’ or ‘Check
Pattern of device’ ) is displayed for 1 second.
(2) ADC 1080i Component2/RGB Adjustment
Check the connection Component2, RGB to the Test
Equipment
(1) Select Component2 as the input with 100% Horizontal
Color Bar Pattern(HozTV31Bar) in 1080i Mode and
select ‘Normal’ in screen.
(2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘5. ADC 480p Comp2/RGB’.
Pressing the Enter Key to adjust with automatic
movement.
(3) When the adjustment is over, 'ADC Component2
Success’ is displayed. If the adjustment has errors,
'ADC Configuration Error’ is displayed.
(4) After the Component2 adjustment is over, convert the
RGB-DTV Mode and display Pattern.
When the adjustment is over, 'ADC RGB_DTV Success’
is displayed.
(5) Readjust after confirming the case Pattern or
adjustment condition where the adjustment errors.
Error massage is ‘Component Not Connection’ or
‘Change Format to 480i’ or ‘Check Pattern of device’.
(6) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
11. Adjustment of White Balance
11-1. Connection Diagram of Equipment
for Measuring
(Automatic Adjustment)
[ RS-232C Command
(Automatic Adjustment)
- 15 -
Full White Pattern
Digital RGB
PDP MONITOR
COLOR
ANALYZER
TYPE; CA-100
MSPG-925FA
<Fig. 4> Connection Diagram of Automatic Adjustment
R Gain
G Gain
B Gain
R Cut
G Cut
B Cut
Jg
Jh
Ji
Cool
Ja
Jb
Jc
Mid
RS-232C COMMAND
[CMD ID DATA]
CENTER
(DEFAULT)
Jd
Je
Jf
00
00
00
255
255
255
127
127
127
Warm
Min Max
184
187
192
64
64
64
Cool
161
183
192
64
64
64
Mid
192
159
95
64
64
64
Warm
<Fig. 3> Adjustment Pattern : 480i/1080i 60Hz HozTV31
Bar Pattern