Panasonic PT-56DLX25 Service Manual page 51

WHITE BALANCE ADJUSTMENT
(Selection of White Balance data)
Note:
Be sure to perform the White Balance Adjustment
after turning on the power for more than 3 minutes so that color
temperature is stable.
Purpose:
To set the standard white level for color temperature.
Symptom of Misadjustment:
White color of picture will become bluish or reddish.
<100% White signal>
SET UP:
1. Install the Optical Block Unit into the Cabinet.
2. 1) Press MENU key with the power on.
2) Set the following setting in Picture menu.
- Pic. Mode to "Standard"
- Color Temp to "Normal"
3. Enter Work Mode. Then, enter Factory Adjust Mode.
4. Press the CH UP/DOWN key on the remote to select
"OTHER" on menu and press the OK key. (OTHER
menu will appear.)
5. Supply 100% White Signal using a video pattern
generator. Then, set to VIDEO 1 mode by pressing the
TV/VIDEO key.
1. Press the CH UP/DOWN key on the remote to select "WB"
on menu.
2. Select "WB" value (00 ~ 05) by pressing VOLUME UP/
DOWN key so that the white color of screen is standard.
WB color
00
factory default
01 reddish
02
03 (middle)
04
05 bluish
Note:
If the screen looks bluish, select 01.
If the screen looks reddish, select 05.
Note:
After this adjustment, do not copy using the EEP COPY L->DG
in the Factory Adjust Mode.
Otherwise, the factory default data of the Optical Block Unit will
be copied to the EEPROM IC on the Main C.B.A. (Circuit Board
DG), and re-adjustment will be necessary.
49
PT-56DLX75 / PT-61DLX75
Color temperature
low
(middle)
high