Panasonic TH50PX80UA - 50" PLASMA TV, Service Manual

Page: 27 / 129

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8.2. Adjustment
8.2.1. White balance adjustment
Name of measuring instrument Connection Remarks
• W/B pattern
• Color analyzer
(Minolta CA-100 or equivalent)
Component input
Panel surface
Procedure Remarks
• Make sure the front panel to be used on the final set is fitted.
• Make sure a color signal is not being shown before adjustment.
• Put the color analyzer where there is little color variation.
1. Output a white balance pattern.
2. Check that the color temperature is [Cool].
3. Set to serviceman mode, WB-ADJ.
4. Set [R-CUT] [G-CUT] [B-CUT] the values written in table 1.
5. Attach the sensor of color analyzer to the center of highlight window.
6. Fix G drive at C0h and adjust [B-DRV] and [R-DRV] so x, y value of color analyzer
become the [Color temperature High] in table 2.
7. Increase RGB together so the maximum drive value in RGB becomes FC. That is,
set [ALL DRIVE] to FC.
Execute adjustment again. When that, the maximum value of R/G/B DRV should be FC,
and either R/G/B DRV should be FC.
8. Set color temperature to [Normal].
9. Set [R-CUT] [G-CUT] [B-CUT] the values written in table 1.
10. Attach the sensor of color analyzer to the center of highlight window.
11. Fix G drive at C0h and adjust [B-DRV] and [R-DRV] so x, y value of color analyzer
become the [Color temperature Mid] in table 2.
12. Increase RGB together so the maximum drive value in RGB becomes FC. That is,
set [ALL DRIVE] to FC.
Execute adjustment again. When that, the maximum value of R/G/B DRV should be FC,
and either R/G/B DRV should be FC.
13. Set color temperature to [Warm].
14. Set [R-CUT] [G-CUT] [B-CUT] the values written in table 1.
15. Attach the sensor of color analyzer to the center of highlight window.
16. Fix G drive at C0h and adjust [B-DRV] and [R-DRV] so x, y value of color analyzer
become the [Color temperature Low] in table 2.
17. Increase RGB together so the maximum drive value in RGB becomes FC. That is,
set [ALL DRIVE] to FC.
Execute adjustment again. When that, the maximum value of R/G/B DRV should be FC,
and either R/G/B DRV should be FC.
18. Set color temperature to [Cool].
- adjustment of [Normal] [Warm] by data shift from [Cool] adjust. -
For [Normal] [Warm] adjustment, set values that the adjusted value of [Cool]
plus the figures wrote below.
When the measurement data is not in the following tolerance by the shipping confirma-
tion, please re-adjust.
Tolerance : ( x , y ) = ( setting data±0.007, setting data±0.007)
19. Copy values adjusted by HD pattern to the NTSC data area of EEPROM.