Total Assembly Line Process; Adc Process; Component Input Adc; Dpm Operation Confirmation - LG M2762DP-EML Service Manual

3.1 ADC Process

3.1.1 PC input ADC
3.1.1.1 Auto RGB Gain/Offset Adjustment
_ Convert to PC in Input-source
I2C COMMAND : 0xF4 (SELECT_INPUT) 0x00 0x60 (RGB)
cf. 0x10(TV), 0x20(AV), 0x40(COMPONENT), 0x60(RGB),
0x90(HDMI)
_ Signal equipment displays
Output Voltage : 700 mVp-p
Impress Resolution XGA (1024 x 768 @ 60Hz)
Model : 60 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)].
Adjustment pattern (PC )
_ Adjust by commanding AUTO_COLOR_ADJUST(0xF1) 0x00
0x02 instruction.
3.1.1.2 Confirmation
_We confirm whether "0xB6(RGB)" address of EEPROM "0xA2"
is "0xAA" or not.
_If "0xB6(RGB)" address of EEPROM "0xB2" isn't "0xAA", we
adjust once more
_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 "INSTART" key,
execute "ADC Adjust" by pushing "_" key at "Adjust-RGB".

3.2.1COMPONENT input ADC

3.2.1.1Component Gain/Offset Adjustment
_ Convert to Component in Input-source
I2C COMMAND : 0xF4 (SELECT_INPUT) 0x00 0x40
(COMPONENT)
cf. 0x10(TV), 0x20(AV), 0x40(COMPONENT), 0x60(RGB),
0x90(HDMI)
_ Signal equipment displays at SD Mode
Impress Resolution 480i
MODEL : 209 in Pattern Generator(SD Mode)
PATTERN : 08 in Pattern Generator( MSPG-925
SERISE)
_ Signal equipment displays at HD Mode
Impress Resolution 1080i
MODEL : 223 in Pattern Generator(HD Mode)
PATTERN : 08 in Pattern Generator( MSPG-925 SERISE)
Adjustment pattern (COMPONENT )
Copyright ©2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.2 Function Check
3.2.1 Check display and sound
_Check Input and Signal items. ( cf. work instructions)
1.TV
2. AV (CVBS/ S-Video)
3.COMPONENT (1080i)
4.RGB (PC : 1980*1080 @ 60hz)
5.HDMI
6.PC Audio In and H/P Out
* Display and Sound check is executed by Remote controller.

4. Total Assembly line process

4.1 Adjustment Preparation
_ Above 30 minutes H/run in RF no signal
_ 15 Pin D-Sub Connector, for IIC communication not including
VGA signal, is connected to AUTO W/B EQUIPMENT
4.2 Adjust color coordinate of 9300K
_ Set Input mode to RGB.
_ Set Temperature : 9300K
_ Adjust x: 0.283 ±0.005, y: 0.298 ±0.005(9300
4.3 Adjust color coordinate of
Temperature)
_ Set Input mode to RGB.
_ Set Temperature : 8000K
_ Adjust x: 0.298 ±0.005, y: 0.305 ±0.005(8000
4.4 DPM operation confirmation (Only Apply for MNT Model)
Check if Power LED Color and Power Consumption operate as
standard.
_ Set Input to RGB and connect D-sub cable to set
_ Measurement Condition : (100~240V@ 50/60Hz)
_ Confirm DPM operation at the state of screen without Signal
4.5 DDC EDID Write : M2762DP-PML
_ Connect D-sub Signal Cable to D-Sub Jack.
_ Connect DVI Signal Cable to DVI Jack.
_ Connect HDMI1,2 Signal Cable to HDMI1,2 Jack.
_ Write EDID DATA to EEPROM(24C02) by using DDC2B
protocol.
_ Check whether written EDID data is correct or not. (refer to
Product spec).
4.6 HDCP (High-Bandwidth Digital Contents Protection)
SETTING
_ Connect D-sub Signal Cable to D-Sub Jack
_ Input HDCP key with HDCP-key- in-program
_ HDCP Key value is stored on EEPROM(AT24C512) which is
80~A1 addresses of 0xA0~0xA2 page
._AC off/ on and on HDCP button of MSPG925 and confirm
whether picture is displayed or not of using MSPG925
_ HDCP Key value is different among the sets.
- 14 -
K )
o
8000K(Normal, Color
o K)
LGE Internal Use Only