LG M1994A-PTJ Service Manual page 15

3.2.1COMPONENT input ADC
3.2.1.1Component Gain/Offset Adjustment
• Convert to Component in Input-source
• Signal equipment displays
Impress Resolution 480P
MODEL : 212 in Pattern Generator
(480p Mode, Y: 100%, Pb/Pr: 75%)
PATTERN : 08 in Pattern Generator
( MSPG-925 SERISE)
Adjustment pattern (COMPONENT )
• Adjust by commanding AUTO_COLOR_ADJUST(0xF1)
0x00 0x02 instruction
3.2.1.2 Confirmation
• We confirm whether "0x8D, 0x8E" address of EEPROM
"0xB4" is "0xAA" or not.
• If "0x8D, 0x8E" address of EEPROM "0xB4" isn't
"0xAA", we adjust once more
• We can confirm the ADC values from "0x00~0x05"
addresses in a page "0xB4"
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 (480P)
4.RGB (PC : 1024 x 768 @ 60hz )
5.DVI-PC
6.HDMI-DTV
7.PC Audio In and H/P Out
8.AV Sound
* Display and Sound check is executed by Remote controller.
4. Total Assembly line process
4.1 Adjustment Preparation
• Above 30 minutes H/run in Video no signal
• 15 Pin D-Sub Jack is connected to the signal of Pattern
Generator.
4.2 Confirm color coordinate of RGB
- Check White Balance
• Set Input to RGB.
• Input signal : (1024 x 768 @ 60Hz)
Full white 255/255 gray level
(100 IRE, Model : 60, Pattern : 4 at MSPG925L)
• Set ACC : 6500k
• Confirm whether x = 0.313±0.03, y = 0.329±0.03 or not.
• Confirm whether luminance over 200cd/m2
• Set ACC : 9300k
• Confirm whether x = 0.283±0.03, y = 0.298±0.03 or not.
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Only for training and service purposes
- Check sRGB
• Set Input to RGB.
• Input signal : (1024 x 768 @ 60Hz)
Full white 255/255 gray level
(100 IRE, Model : 60, Pattern : 4 at MSPG925L)
• Set ACC : sRGB
• Confirm whether x = 0.313±0.03, y = 0.329±0.03 or not.
• Confirm whether luminance = 180±50 cd/m2
4.3 Confirm color coordinate of AV
• Set Input to AV.
• Input signal : CVBS, NTSC @ 60Hz
Full white 216/255 gray level
(85 IRE, Model : 201, Pattern : 78 at MSPG925L)
• Set APC : Clear / ACC : Cool
• Confirm whether x= 0.285°±0.03, y= 0.293°±0.03 or not.
4.4 Confirm color coordinate of COMPONENT
• Set Input to COMPONENT.
• Input signal : 480P
Full white 216/255 gray level
(85 IRE Model : 212, Pattern : 78 at MSPG925L)
• Set APC : Clear / ACC : Cool
• Confirm whether x= 0.285°±0.03, y= 0.293°±0.03 or not.
4.5 Confirm Auto adjustment operation.
• Input 1Dot on/off & Rectangle Pattern at Model 60
(1024*768@60Hz).
• Confirm adjustment operation by changing Clock,
Phase, H/V Position.
• Check Clock, Phase by pressing AUTO Key after
varying the Clock & the Phase
4.6 Other quality
• Confirm that each items satisfy under standard condition
that was written product spec.
Confirm Video and Sound at each source
4.6.1 AV
Select input AV(S-video) and whether picture is
displayed or not
Select input AV(CVBS) and whether picture
displayed or not
4.6.2 TV
• Select input TV and check below item
1> In Gumi Factory
US04 – CAPTION, Stereo
4.6.3 RGB
4.6.3.1
Select input RGB model 112(1440*900@60hz), 64 Gray
Scale pattern and whether picture is displayed or not
4.6.4 COMPONENT
Select input COMPONENT and whether picture is
displayed or not
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LGE Internal Use Only