LG 20LS1R-ZG, Service Manual

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[Adjustment pattern(PC and CVBS)]
3.3.4 Preparation for Function check
A
Input source change TV and II_SW change to "1" by
commanding F3 x 00 instruction.
3.4 Function Check
3.4.1 DDC2B test
"IIC_ SW" must set "1" (After ADC, automatically set
"1")
A
Execute DDC2B Scan Test
3.4.2 Check display and sound
"IIC_ SW" must set "1"
A
Check Input and Signal items
1. TV
2. AV1 (SCART)
3. AV2 (CVBS/ S-Video)
4. RGB-DTV
5. RGB-PC
6. PC Audio In and H/P Out
4. Total Assembly line process
* Caution *
If DDC CMD don't work, please check below.
1. Enter SVC menu by SVC Remote controller
2. Enter "ETC" menu
Check please, IIC_SW is "0" or "1"
- IIC_SW "0" DDC Communications.(DDC2AB)
- IIC_SW "1": EDID Write/Read(DDC2B) and Factory
default.
* We can change IIC_SW by pushing "VOL+" key in SVC
remote controller
4.1 Adjustment Preparation
"IIC_ SW" must set "0°" By pushing "POWER ON" and "TILT" key.
A
Above 30 minutes H/run in RF no signal
A
15 Pin D-Sub Jack is connected to the signal of Pattern
Generator.
4.2 Confirmation of Luminance
4.2.1 RGB-PC input (15", 17", 19" apply)
A
Set Statement
Input : RGB PC
Contrast : 100 (Max) / Brightness : 50
A
Signal equipment displays
Output Voltage : 700 mVp-p
Output Mode : Full White pattern and XGA@60 Hz
(Model : 37 Pattern : 04 MSPG-925)
4.2.2 AV2 input
A
Set Statement
Input : AV2 (CVBS) / PSM : Dynamic
A
Signal equipment displays
Output Voltage : 700 mVp-p
Output Mode:576i(Model : 202 Pattern : 04 MSPG-925 )
4.3 Confirmation of Color Coordinate
A
Input : Full white pattern RGB-PC(Model : 37 Pattern : 04
MSPG-925)
AV2-CVBS(Model : 202 Pattern : 04 MSPG-925)
A
PSM : Dynamic
A
Confirm whether x±0.03, y±0.03 or not (Color Temp.9300K)
After Confirming color coordinate and luminance, "IIC_ SW" set
"1" automatically.
4.4. Outgoing condition Configuration
A
Outgoing Option setting in Service OSD.
A
Press IN-START Key by using the SVC Remote Controller
A
Press 8 digit code by SVC Remote controller refer
3854TAA001A or 3854TAA002A in BOM
A
After option configuration is complete, Exit SVC MENU
OSD
4.5 Other quality
A
Confirm that each items satisfy under standard condition
that was written product spec.
Confirm Video and Sound at each source
1) AV
Select input AV1 and whether picture is displayed or not
- SCART output displayed or not
Select input AV2 (CVBS) and whether picture is displayed
or not
Select input AV2 (S-video) and whether picture is displayed
or not
2) TV
A
Select input TV and check below item
(1) In Gumi Factory
C05 (E05) - TELETEXT Function Check
; (Applicable to the model that has Teletext
code set-up item in Product spec)
C07 (E07) - Nicam DUAL Check
C52 (E52) - Nicam Stereo Check
Preset CH information
3) RGB-DTV/PC
Select input RGB DTV and whether picture is displayed or
not
4.6 DPM operation confirmation
Check if Power LED Color and Power Consumption operate
as standard.
A
Measurement Condition : 230V@ 50Hz (Analog)
A
Confirm DPM operation at the state of screen without Video
Signal.
4.7 DDC EDID Write
A
Connect D-sub Signal Cable to D-Sub Connector
A
Write EDID DATA to EEPROM (24C02) by using DDC2B
protocol.
A
Check whether written EDID data is correct or not. (refer to
Product spec).
4.8 Outgoing condition Configuration
A
After all function test., press IN-STOP Key by SVC Remote
controller. And Make Ship Condition.
A
Amber LED is blink. And then automatically turn off. . (Must
not AC OFF during blink)