Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
1. Application Object
This specification sheet applied to LA92F Chassis applied
LCD TV all models manufactured in TV factory.
2. Notes
1) Because this is not a hot chassis, it is not necessary to use
an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
2) Adjustment must be done in the correct order. But it is
flexible when its factory local problem occurs. .
3) The adjustment must be performed in the circumstance of
25 ±5°C of temperature and 65±10% of relative humidity if
there is no specific designation.
4) The input voltage of the receiver must keep 220V, 60Hz.
5) Before adjustment, execute Heat-Run for 5 minutes.
• How to make set white pattern
1) Press Power ON button of Service Remocon
2) Press ADJ button of Service remocon. Select “7. Test
pattern” and, after select “White” using navigation button,
and then you can see 100% Full White pattern.
* In this status you can maintain Heat-Run useless any
pattern generator
* Notice: if you maintain one picture over 20 minutes
(Especially sharp distinction black with white pattern –
13Ch, or Cross hatch pattern – 09Ch) then it can appear
image stick near black level.
3. Adjustment items
3.1. Board adjustment
- ADC Calibration(Media-Box Only)
- EDID/DDC download
Above adjustment items can be also performed in Final
Assembly if needed. Both Board-level and Final assembly
adjustment items can be check using In-Star Menu 1.ADJUST
CHECK.
* Don't use Instop key after Media-Box Main b/d board test
and Media-Box assemble & test.
3.2. Final assembly adjustment
- Wireless Pairing
- White Balance adjustment
- RS-232C functionality check
- Factory Option setting per destination
- EYE-Q Test
- Ship-out mode setting (In-Stop)
3.3 Etc
- Ship-out mode
- Service Option Default
4. Automatic Adjustment
4.1. ADC(LGE3369) Adjustment
4.1.1 Overview
ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate
RGB deviation.
4.1.2 Equipment & Condition
1) Jig (RS-232C protocol)
2) External/Internal Pattern
- ADC Comp 480i / ADC Comp 1080p
=> Select component 480i signal that is same as the
image below on the Media-Box with using Pattern
Generator(MSPG-925FA or etc)
3) Adjustment ADC RGB
=> Using Internal Pattern
4) Image
4.1.3 Adjustment
4.1.3.1 Adjustment method
- Using RS-232, adjust items listed in 3.1 in the other
shown in “4.1.3.3”
4.1.3.2 Adj. protocol
Ref.) ADC Adj. RS232C Protocol_Ver1.0
4.1.3.3 Adj. order
- aa 00 00 [Enter ADC adj. mode]
- xb 00 04 [Change input source to Component1]
- ad 00 10 [Adjust 480i Comp1]
- xb 00 60 [Change input source to RGB-DTV]
- ad 00 10 [Adjust 1080p Comp1/RGB]
- ad 00 90 End adj.
LGE Internal Use Only
- 11 -
ADJUSTMENT INSTRUCTION
Protocol
Command
Set ACK
Enter adj. mode
aa 00 00
a 00 OK00x
Source change
xb 00 40
b 00 OK40x (Adjust 480i Comp1 )
xb 00 60
b 00 OK60x (Adjust 1024*768 RGB)
Begin adj.
ad 00 10
Return adj. result
OKx (Case of Success)
NGx (Case of Fail)
Read adj. data
(main)
(main)
ad 00 20
000000000000000000000000007c007b006dx
(sub)
(Sub)
ad 00 21
000000070000000000000000007c00830077x
Confirm adj.
ad 00 99
NG 03 00x (Fail)
NG 03 01x (Fail)
NG 03 02x (Fail)
OK 03 03x (Success)
End adj.
aa 00 90
a 00 OK90x
Summary of Contents for 55LH85 - - 54.6" LCD TV
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