Circuit Adjustments - Sanyo PLC-XF46N Service Manual

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Circuit Adjustments

CAUTION: The each circuit has been made by the fine adjustment at factory. Do not attempt to adjust the following
adjustments except requiring the readjustments in servicing otherwise it may cause loss of performance
and product safety.
WARNING : USE UV RADIATION EYE
AND SKIN PROTECTION
DURING SERVICING
[Adjustment Condition]
● Input signal
Computer signal .................... 0.7Vp-p/75Ω terminated,
Composite video signal.......... 1.0Vp-p/75Ω terminated,
Component Video signal........ 0.7Vp-p/75Ω terminated,
● Picture control mode ................ "STANDARD" mode unless otherwise noted.
Note :
■ The following adjustment is the adjustment item for
Assembly power.
1-1. +6V voltage adjustment
■ The following adjustment is the adjustment item for
Switching Regulator.
1-2. +25V voltage adjustment
■ The following adjustmenta are the adjustment items for
Terminal board-AV. The adjustment data is stored to
Terminal board-AV (IC2143).
2. AV video signal adjustment
3. AV 3DNR-PLL lock check
4. AV color and tint adjustment
■ The following adjustment is the adjustment item for
Assembly sub power and Assembly main. The adjustment
data is stored to Assembly main (IC1811).
5. Fan driving voltage adjustment
16 steps gray scale pattern (XGA),
100% and 50% white pattern (XGA),
1 dot line pattern (XGA)
16 steps gray scale pattern,
color bar pattern (PAL, NTSC)
100% and 50% white pattern
16 steps gray scale pattern (480i),
color bar pattern (480i)
■ The following adjustments are the adjustment items for
■ The following adjustment data is stored to Assembly main
-79-
CAUTION: To prevent suffer of UV radiation,
those adjustments must be com-
pleted within 25 minutes.
16 steps gray scale pattern
White 100%
Assembly main. The adjustment data is stored to
Assembly main (IC1811).
6. Video signal center adjustment
7. PSIG adjustment
8. Gain adjustment (PC)
9. Gain adjustment (AV)
10. Gain adjustment (Component)
11. Black level adjustment (PC)
12. Common center adjustment
13. Panel luminance adjustment (PC)
14. White balance adjustment (PC)
15. Panel luminance adjustment (AV)
16. White balance adjustment (AV)
17. White balance adjustment (AV 2Lamps)
(IC871).
18. Color shading correction.
Electrical Adjustments
Black 100%