Panasonic TH-50PF30U, Service Manual

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9.2.2. YUV white balance adjustment
TH-50PF30U
Instrument Name Connect to Setting
HD(1125/60i) W/B pattern (COMPONENT Output)
Color analyzer
(Minolta CA-100 or equivalent)
PC IN terminal
Panel surface
Picture menu: STANDARD
User setting: Normal
except PICTURE: max 30
Steps Remarks
[conditions]
• 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.
[Adjustment]
1. Set COMPONENT / RGB-IN SELECT to COMPONENT.
2. Select the IIC mode “PANEL W / B Adj.” item.
3. Check that the color temperature is “COOL (Hi)”.
4. Output a white balance pattern.
5. Touch the signal receiver of color analyzer to the highlight window's center.
6. Fix G drive at E0h and adjust B drive and R drive so x, y become the “Color temperature
COOL (Hi)” in the below table. Adjust it again after it lowers of 08h data when the adjust­
ment is NG. (In addition, adjust it after it lowers by 08h data for NG.)
7. Adjust R/G/B together by multiplication so the maximum drive value in R/G/B becomes
FCh with the gain ratio kept. (ALL-DRIVE)
8. Set color temperature to “NORMAL (Mid)”.
9. Fix G drive at E0h and adjust B drive and R drive so the highlight window's x, y becomes
the "Color temperature NORMAL(Mid)" in the below table.
Adjust it again after it lowers of 08h data when the adjustment is NG.
(In addition, adjust it after it lowers by 08h data for NG.)
10. Adjust R/G/B together by multiplication so the maximum drive value in R/G/B becomes
FCh with the gain ratio kept. (ALL-DRIVE)
11. Set color temperature to “WARM (Low)”.
12. Set G drive to E0h and adjust B drive and R drive so the highlight window's x, y become
the "Color temperature WARM(Low)" shown in the below table.
Adjust it again after it lowers of 08h data when the adjustment is NG.
(In addition, adjust it after it lowers by 08h data for NG.)
13. Adjust R/G/B together by multiplication so the maximum drive value in R/G/B becomes
FCh with the gain ratio kept. (ALL-DRIVE)
14. Copy the R drive, G drive and B drive data in YUV1_525ip, YUV3_625ip region.
Table 6 W /B adjustm ent values
Picture Menu: STANDARD
User setting: Normal
except PICTURE: max 30
Aspect: Full (16 : 9)
Position and size: Normal
• “7” key : color temperature select.
• “9” key : Picture menu select.
• Highlight section Signal amplitude 75%
Drive standard G: E0h
Color temperature
X У
COOL(Hi) 0.276 0.276
NORMAL(Mid) 0.288 0.296
WARM(Low) 0.313 0.329
Adjustment target
Hi-light: x ± 0.003 y ± 0.003
Hi-light is target of the number at drive adjustment in the hi-light windows.
Therefore, it is not target of the hi-light number at after adjustment white balance.
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