AOC 193P+, Service Manual

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AOC 193P+
40
9. Check List
①
. After replacing LCD Main board and panel, Check if white-balance is within the specs, then re-writing DDC
is necessary.
The white-balance value for each common color temperature:
C1/ 6500 º K :
（
warm color
）
x = 313 ± 20 ; y = 329 ± 20;
C2/ 7800 º K :
（
cool color
）
x=296 ± 20 ; y = 311 ± 20.
The color temperature value above must be up to the situation of x<y. The value of Y should be confirmed
according to different customers. 15 ”LCD is commonly 180±20cd/cm
2
（
Center
）
and 17” LCD is required to be
larger than 200cd/cm
2
(Center). The exact brightness values are confirmed by the checking-regulations of different
customers and different models.
②
. Steps of white-balance adjustment for LCD:(Take 17” AOC LCD LM724 for example)
1. Required instruments: Chroma7120
、
Chroma2325
（
BGA265A
）。
2. First connect the instruments together and turn on the LCD power, then warm up for 30 minutes under full
white screen mode. First press the “Reset” key in the menu to recover factory set as following.
Set Chroma2325 at round-windows mode and make the detecting-head of Chroma7120 aim at the cross in
the middle, the distance between the detecting-head and the cross is 20cm.
3. Set Chroma2325
（
BGA265A
）
to be T144
（
1280*1024/60HZ
）
and P105 of full white screen. Test if the
white-balance value is within the specs. Please follow the steps below to adjust if it is beyond the specs.
4. Cut the power. Then press MENU key and re-plug power cable at the same time to enter into the factory
mode. See the following pictures.
5. Test white-balance again after Auto Level. Adjustment with hand is necessary if it is beyond the specs.
6. Select 7x00 item to adjust cool color-temperature and select 6x00 to adjust warm color- temperature. It can
reach to the best effect through adjusting R/G/B value if it inclines to green or blue.
7. Select Exit to the upper menu after completing the adjustment. Then press POWER OFF to exit and save it.
Select ”F
”
,then
Select AUTO LEVEL