LG 50PM4700 Service Manual page 6

* ADC Adjustment(Manual)
-> GP4 (PU22A/PB22A/PK22A) Chassis don't need ADC
adjust process.The ADC value have been OTP process.
but, if you need to adjust ADC manually follow this method.
■ Using instruments
- Adjustment remocon, 801GF(802B, 802F, 802R) or
MSPG925FA pattern generator
(It can output 480i/1080i horizontal 100% color bar pattern
signal, and its output level must setting 0.7V±0.1V p-p
correctly)
< Adjustment pattern : 480i / 1080p 60Hz Pattern >
(1) Adjustment method 480i Comp1, Adjust 1080p Comp1/
RGB (Factory adjustment)
(2) ADC 480i Component1 adjustment
(3) Check connection of Component1
(4) MSPG-925FA -> Model: 209, Pattern 65
(5) Set Component 480i mode and 100% Horizontal Color Bar
Pattern(HozTV31Bar), then set TV set to Component1
mode and its screen to "NORMAL"
(6) Check connection both of Component1 and RGB
(7) MSPG-925FA -> Model: 225, Pattern 65
(8) Set Component 1080p mode and 100% Horizontal Color
Bar Pattern(HozTV31Bar), then set TV set to Component1
mode and its screen to "NORMAL"
(9) After get each the signal, enter the "EZ ADJUST" status
with pres ADJUST key of Service remocon. After then
select "8. ADC Calibration" with navigator button and press
"Enter".
(10) After then select "ADC Type" and set value "OTP ->
External" with navigator button.
(11) After then press "Start" button.
(12) You can see "ADC Component1 Success"
(13) Component1 1080p, RGB 1080p Adjust is same method.
(14) Component 1080p Adjustment in Component1 input
mode.
(15) RGB 1080p adjustment in RGB input mode.
(16) If you success RGB 1080p Adjust. You can see "ADC
RGB-DTV Success
4.3. EDID(The Extended Display Identification
Data)/ DDC(Display Data Channel)
- It is a VESA regulation. A PC or a MNT will display an
optimal resolution through information sharing without any
necessity of user input. It is a realization of "Plug and Play".
-> GP4 (PU22A/PB22A/PK22A) Chassis don't need EDID
Download process.
Whenever TV power on, the EDID data was written on
inner memory.
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4.3.1. EDID DATA(AC-3)_PB22A
■ HDMI [C/S: 3F A6] : For HD Models
EDID Block 0, Bytes 0-127 [00H-7FH]
Block Type: EDID 1.3
EDID Block 1, Bytes 128-255 [80H-FFH]
Block Type: CEA EDID Timing Extension Version 3
Vender ID
HDMI1
HDMI2
HDMI3
HDMI4
■ RGB [C/S: 58] : For HD Models
EDID Block 0, Bytes 0-127 [00H-7FH]
Block Type: EDID 1.3
- 6 -
C/S1 C/S2
10 3F A6
20 3F 96
30 3F 86
40 3F 76
LGE Internal Use Only