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Copyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
ADJUSTMENT INSTRUCTIONS
1. Application Range
This spec sheet is applied to all of the PP78D chassis .
2. Specification
(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 to protect test instruments.
(2) Adjustment must be done in the correct sequence.
(3) The adjustment must be performed at 25±5°C temperature
and 65±10% relative humidity if there is no specified
designation.
(4) The input voltage of the receiver must be kept between
100~220V, 50/60Hz.
(5) Before adjustment, execute Heat-Run for 30 minutes at RF
no signal.
3. ADC Calibration
3-1. PC input ADC
(1) Auto RGB Gain/Offset Adjustment
1) Convert to PC in Input-source
2) Signal equipment displays
Output Voltage : 700 mVp-p
Impress Resolution XGA (800 x 600 @ 60Hz)
Model : 46 in Pattern Generator
Pattern : 29 in Pattern Generator (MSPG-925 SERISE)
[gray pattern that left & right is black and center is white
signal (Refer below picture)]
3) Adjust by commanding AUTO_COLOR_ADJUST(0xF1)
0x00 0x02 instruction.
(2) Confirmation
1) We confirm whether “0xB6(RGB)” address of EEPROM
“0xA2” is “0xAA” or not.
2) If “0xB6(RGB)” address of EEPROM “0xB2” isn’t “0xAA”,
we adjust once more
3) We can confirm the ADC values from
“0xB0~0xB5(RGB)” addresses 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 “Adjust-RGB”.
3-2. COMPONENT input ADC
(1) Component Gain/Offset Adjustment
1) Convert to Component in Input-source
2) Signal equipment displays
Impress Resolution 720P
MODEL : 216 in Pattern Generator(720P Mode)
PATTERN : 08 in Pattern Generator(MSPG-925 SERISE)
3) Adjust by commanding AUTO_COLOR_ADJUST(0xF1)
0x00 0x02 instruction
(2) Confirmation
1) We confirm whether “0xC8(720P)” address of EEPROM
“0xA2” is “0xAA” or not.
2) If “0xC8(720P)” address of EEPROM “0xA2” isn’t
“0xAA”, we adjust once more
3) We can confirm the ADC values from “0xB9~
0xBE(480i)/0xC2~(1080i)” addresses in a page “0xA2”
MSPG-
925FA
Component
Model: 216
(720p@60Hz)
Model: 46
(800x600@60Hz)
RGB
Adjustment pattern (PC)
Adjustment pattern (COMPONENT)
