Panasonic PT-52LCX66-K Service Manual page 101

WHITE BALANCE ADJUSTMENT
Note:
1. Be sure to perform the White Balance Adjustment
after the power has been on for more than 10 minutes so
that color temperature is stable.
2. This adjustment should be done in a darkroom.
Purpose:
To set the standard white level for each color temperature.
Symptom of Misadjustment:
The white color of picture will become bluish or reddish.
TP ADJ.
Hi Data
(PC Input Terminal)
Lo Dada
Gray Scale Pattern Signal (16 scales)
or
(VIDEO Input 1 Terminal)
Gray Scale Pattern Signal (10 scales)
EQUIPMENT
PC(1)/(2), Test Pattern Signal,
NTSC Video Pattern Generator
Test Pattern Signal:
- Gray Scale Pattern Signal (16 scales): "1 White 16 grade
(Horiz)" in "Bar Reverse"
SET UP for LCD Drive Adjustment software (Software (2)):
1) Copy the "FFF_2006D" folder to any drive on the PC (1).
2) Execute the "Vcom_2006.exe."
3) To turn the remote on, press DEL key.
4) "Manu" indication will change to "Auto" indication, and
"Remote ON" indication will appear.
Not used for service
Do not change
(fixed value)
Input data for WB adjustment
Hi Data
02
Default
00 ~ 03
Range
5) After completing WB Adjustment, turn the remote off by
pressing DEL key. Then, close the software (2).
INPUT
SPECIFICATION
Refer to Description below
Do not press
Press for WB Red
after data input
Do not press
Press for WB Blue
after data input
Lo Data
00
00 ~ FF
Rough Adjustment:
(Rough adjustment by PC signal : Determined visually)
1. Connect the PC(2) to the PC Input Terminal with the RGB
Cable.
2. Set to PC mode by pressing TV/VIDEO key on the remote.
3. Set to "Dynamic Iris Off" of Adv. adjust in Picture Menu.
(Or, disconnect Connector CN9502 on the Iris P.C.B.)
4. Supply Gray Scale Pattern Signal (16 scales) from PC(2).
5. Select "Hi Data" on menu with mouse, input a 2-byte value
(00~03) to "Hi Data."
6. Select "Lo Data" on menu with mouse, input a 2-byte value
(00~FF) to "Lo Data."
Note for inputting data:
When inputting "Hi Data" and "Lo Data"data, it is
recommended to adjust by increasing or decreasing from
the Default value (Hi Data: 02, Lo Data: 00).
7. Then, press "2Byte Set A" or "2Byte Set C" to transmit the
White Balance Red data or Blue data.
8. Repeating above steps 5~7, adjust White Balance Red
and Blue so that the area around the 14th and 16th scale
(A) becomes pure gray with no red or blue tint.
Gray Scale Pattern Signal (16 scales)
(A)
White
16th gray scale
Note:
Adjust viewing in scale (A) although, the white color of the
entire screen changes.
(Rough adjustment by video signal : Determined visually)
1. Connect the NTSC Video Pattern Generator to the VIDEO
Input 1 Terminal.
2. Set to VIDEO 1 mode by pressing TV/VIDEO key on the
remote.
3. Set to "Dynamic Iris Off" of Adv. adjust in Picture Menu.
(Or, disconnect Connector CN9502 on the Iris P.C.B.)
4. Supply Gray Scale Pattern Signal (10 scales).
5. Select "Hi Data" on menu with mouse, input a 2-byte value
(00~03) to "Hi Data."
6. Select "Lo Data" on menu with mouse, input a 2-byte value
(00~FF) to "Lo Data."
Note for inputting data:
When inputting "Hi Data" and "Lo Data"data, it is
recommended to adjust by increasing or decreasing from
the Default value (Hi Data: 02, Lo Data: 00).
7. Then, press "2Byte Set A" or "2Byte Set C" to transmit the
White Balance Red data or Blue data.
8. Repeating above steps 5~7, adjust White Balance Red
and Blue so that the area around the 14th and 16th scale
(A) becomes pure gray with no red or blue tint.
Gray Scale Pattern Signal (10 scales)
(B)
White
10th gray scale
Note:
Adjust it with viewing in scale(B) though, the white color of
whole screen changes.
101
PT-52LCX66-K / PT-56LCX16-K / PT-61LCX66-K
Black
1st gray scale
Fig. E6-1
Black
1st gray scale
Fig. E6-2