Panasonic PT-47X54J Service Manual page 225

17.12. White balance adjustment
NOTE:
Use a 7 gray step pattern in this adjustment. This pattern can be obtained from a NTSC generator
applying a bar signal without color.
This adjustment requires the service user skills in observing what a screen without color should
look like (white picture).
Preparation:
1. Set the following in the user picture menu as follows:
- PIC MODE to VIVID
- COLOR to minimum (0)
- PICTURE to max (63)
- BRIGHT to center (31)
- SHARPNESS to minimum (0)
- TINT to center (31)
- NATURAL COLOR to OFF
- COLOR TEMPERATURE to COOL
1. Enter service mode.
2. Apply a black and white pattern to one of the video inputs (see
above note) color bar with no color.
3. Enter service mode menu, select "C_OFF" register and change
value from 00 to 01 to display green color only.
4. Adjust screen VR until bars with 7 and 5 IRE do not have any
difference tone between them.
5. Select "C_OFF" register and change value from 01 to 02 to display
Gray bar pattern.
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