LG M2794D Service Manual page 14
Lcd monitor tv
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Also See for M2794D:
- Owner's manual (102 pages) ,
- Owner's manual (90 pages) ,
- Owner's manual (101 pages)
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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 :209in Pattern Generator(SD Mode)
PATTERN :08in Pattern Generator(MSPG-925
SERISE)
• Signal equipment displays at HD Mode
Impress Resolution:1080i
MODEL :223in Pattern Generator(HD Mode)
PATTERN :08in 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 "0xC8(1080i)"address of EEPROM
"0xA2" is "0xAA" or not.
• If "0xC8(1080i)" address of EEPROM "0xA2" isn't
"0xAA", we adjust once more
• We can confirm the ADC values from "0xC2~(1080i)"
addresses in a page "0xA2"
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: 1680X1050 @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 IIIC communication not
including VGA signal,is connected to AUTO W/B
EQUIPMENT..
* Color Temperature
X=0.285
o
Cool
9,300 K
Y=0.293
X=0.295
o
Medium
8,000 K
Y=0.305
X=0.313
o
Warm
6,500 K
Y=0.329
Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
<Test Signal>
Inner pattern
MSPG Series Pattern 78
(216 Gray level, 85 IRE)
(216 Gray level, 85 IRE)
MSPG Series Pattern 78
(216 Gray level, 85 IRE)
MSPG Series Pattern 78
4.2 Check coordinate of 9300K
•Set Input mode to RGB.
• Set Temperature : 9300K
• Adjust x: 0.285±0.005, y: 0.293±0.005(9300°K )
(Full white MSPG series Pattern 4)
4.3 Check color coordinate of 6500K
• Set Input mode to RGB.
• Set Temperature : 6500K
• Adjust x:0.313±0.005, y:0.329±0.005(6500°K )
(Full white MSPG series Pattern 4)
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 Model Name(M2394D-PMJ)
• 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.
4.7 Outgoing condition Configuration
• After all function test., press IN-STOP Key by SVC Remote
controller. And Make Ship Condition.
• When pressing IN-STOP key by SVC remocon, Red LED
are blinked alternatively. And then Automatically turn off.
(Must not AC power OFF during blinking)
4.8 Internal pressure
• Confirm whether is normal or not when between power
board's ac block and GND is impacked on 1.5kV(dc) or
2.2kV(dc) for one second
- 14 -
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