Adjustment Instruction - LG 42PA4500 Service Manual

1. Application Range
This spec. sheet applies to PB23A chassis applied PDP TV all
models manufactured in TV factory.
2. Specification
(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) T he adjustment must be performed in the circumstance of
25 °C ± 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 AC 100-240
V~, 50/60 Hz.
(5) Before adjustment, execute Heat-Run for 5 minutes.
■ After Receive 100% Full white pattern (06CH) then
process Heat-run
(or "8. Test pattern" condition of Ez-Adjust status)
■ How to make set white pattern
1) Press Power ON button of Service Remocon
2) Press ADJ button of Service remocon. Select "10. 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. PCB Assembly adjustment
■ Adjust 480i Comp1
■ Adjust 1080p Comp1/RGB
● If it is necessary, it can adjustment at Manufacture Line
● You can see set adjustment status at "9. ADJUST
CHECK" of the "In-start menu"
3.2. Set Assembly Adjustment
■ EDID (The Extended Display Identification Data )
■ Color Temperature (White Balance) Adjustment
■ Make sure RS-232C control
■ Selection Factory output option
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes

ADJUSTMENT INSTRUCTION

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4. PCB Assembly Adjustment
4.1. Using RS-232C
- Adjust 3 items at 3.1. PCB assembly adjustments
" 4.1. ■ Adjustment sequence" one after the order.
■ Adjustment sequence
Order command
1. Inter the aa 00 00 a 00 OK00x
Adjustment
mode
2. Change the XB 00 40 b 00 OK40x (Adjust 480i Comp1 )
Source XB 00 60
b 00 OK60x (Adjust 1080p RGB)
3. Start ad 00 10
Adjustment
4. Return the OKx ( Success condition )
Response NGx ( Failed condition )
5. Read ( main ) (main : component1 480i, RGB 1080p)
Adjustment ad 00 20 000000000000000000000000007c007b006dx
data ( main ) (main : component1 1080p)
ad 00 30 000000070000000000000000007c00830077x
6. Confirm ad 00 99 NG 03 00x (Failed condition)
Adjustment NG 03 01x (Failed condition)
NG 03 02x (Failed condition)
OK 03 03x (Success condition)
7. End of ad 00 90 d 00 OK90x
Adjustment
< See ADC Adjustment RS232C Protocol_Ver1.0 >
■ Necessary items before Adjustment items
● Pattern Generator : (MSPG-925FA)
● Adjust 480i comp1
(MSPG-925FA:model :209, pattern :65) - comp1 Mode
● Adjust 1080p comp1
(MSPG-925FA:model :225 , pattern :65) - comp1 Mode
● Addjust RGB (MSPG-925FA:model :225 , pattern :65)
- RGB-Pc Mode
* If you want more information then see the below Adjustment
method (Factory Adjustment)
■ Adjustment sequence
● aa 00 00: Enter the ADc Adjustment mode.
● xb 00 40: change the mode to component1 (No actions)
● ad 00 10: Adjust 480i comp
● ad 00 10: Adjust 1080p comp
● xb 00 60: change to RGB-Pc mode(No action)
● ad 00 10: Adjust 1080p RGB
● xb 00 90: Endo of Adjustmennt
Set response
(Adjust 1080p Comp1)
LGE Internal Use Only