Adjustment Instruction - LG 42PG1000 Service Manual

1. Application Object
These instructions are applied all of the 42" PLASMA TV,
PD83A Chassis.
2. Note
(1) Because this is not a hot chassis, it is not necessary to use
an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
25±5°C of temperature and 65±10% of relative humidity if
there is no specific designation.
(4) The input voltage of the receiver must keep 100-240V~,
50/60Hz.
(5) The receiver must be operated for about 15 minutes prior
to the adjustment.
In case of keeping module is in the circumstance of 0°C, it
should be placed in the circumstance of above 15°C for
2hours.
In case of keeping module is in the circumstance of below
-20°C, it should be placed in the circumstance of above
15°C for 3hours.
After RGB Full white HEAT-RUN Mode, the receiver must
O
be operated prior to adjustment.
Enter into HEAT-RUN MODE
O
1) Press the POWER ON KEY on R/C for adjustment.
2) OSD display and screen display PATTERN MODE.
* Set is activated HEAT-RUN without signal generator in
this mode.
* Single color pattern(RED/BLUE/GREEN) of HEAT-RUN
mode uses to check PANEL.
If you turn on a still screen more than 20 minutes, (Especially
digital pattern, cross hatch pattern) after image may be occur in
the black level part of the screen.
3. ADC Calibration
* Using 'power on' button off the control R/C, power on TV.
Auto adjustment Map(RS-232C)
V
NO Item CMD1 CMD2 Data 0
ADC adjust
ADC adjust
Data Read
ADC Parameter
Digital Data
Default Write
ADC Parameter
(Average)
Adjustment
Confirmation
Enter
Adjust Mode In
Adjust Mode
Adjust Mode Out
- Baud : 115200bps, RS232 Host : PC, Echo : none.
Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes

ADJUSTMENT INSTRUCTION

Remark
A D 1 0
A D 2 0 Transfer 18Byte
A D 3 0 (Input resolution Data)
A D 4 0
A D 9 9 To check ADC Adjustment
on Assembly line
A D 0 0 When transfer the 'Mode
In', Carry the command.
A D 9 0
4. ADC adjustment
ADC
Model : 209(480i 60Hz)
MSPG925FS
5. Adjustment of RGB
5-1. Auto RGB Gain / Offset Adjustment
(1) Convert to PC in Input-source(refer to I2C command at page 10)
(2) Signal equipment displays
Output Voltage : 700 mVp-p
Impress Resolution XGA(1024x768@60Hz)
Model : 60 in pattern Generator
Pattern : 65 in pattern Generator(MSPG-925 Series)
[gray pattern that left & right is black and center is white
signal(Refer below picture)].
(3) Adjust by commanding AUTO_COLOR_ADJUST.
5-2. Confirmation
(1) We confirm whether "0xAA(RGB)" address of EEPROM
"0xA2" is "0xAA" or not.
(2) If "0xAA(RGB)" address of EEPROM "0xA2" isn't "0xAA",
we adjust once more.
(3) We can confirm the ADC values from "0xA4~0xA9(RGB)"
address in a page "0xA2".
* Manual ADC process using Service Remocon. After enter
Service Mode by pushing "ADJ" key, execute "ADC Adjust"
G
by pushing " " key at "ADC CALIBRATION : RGB-C".
- 6 -
Component RGB-PC
Model : 60
223(1080i 60Hz) (1024*768 60Hz)
Pattern : 65 Pattern : 65
(Fig.1)
LGE Internal Use Only