42PG3000-ZA (CHASSIS:PD83A) - LG TV Service Manual (repair manual). Page 6

Read LG 42PG3000-ZA (CHASSIS:PD83A) Service Manual online

- 6 -
ADJUSTMENT INSTRUCTION
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.
O
After  RGB  Full  white  HEAT-RUN  Mode,  the  receiver  must
be operated prior to adjustment.
O
Enter into HEAT-RUN MODE
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.
3. ADC Calibration
Auto adjustment Map(RS-232C)
- Baud : 115200bps, RS232 Host : PC, Echo : none.
4. ADC adjustment
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”
by pushing “
G
“ key at “ADC CALIBRATION : RGB-C”.
* Using ‘power on’ button off the control R/C, power on TV.
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.
ADC adjust
Data Read
Default Write
Enter
Adjust Mode
ADC adjust
ADC Parameter
Digital Data
ADC Parameter
(Average)
Adjustment
Confirmation
Adjust Mode In
Adjust Mode Out
NO
Item
Remark
CMD1 CMD2 Data 0
A
A
A
A
A
A
A
D
D
D
D
D
D
D
0
0
0
0
9
0
0
1
2
3
4
9
0
9
Transfer 18Byte
(Input resolution Data)
To check ADC Adjustment
on Assembly line
When transfer the ‘Mode
In’, Carry the command.
MSPG925FS
Component
RGB-PC
ADC
Model : 60
(1024*768 60Hz)
Pattern : 65
Model : 209(480i 60Hz)
223(1080i 60Hz)
Pattern : 65
(Fig.1)
Page of 30
Display

Click on the first or last page to see other 42PG3000-ZA (CHASSIS:PD83A) service manuals if exist.