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Electrical Adjustments
●
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.
[Adjustment Condition]
● Input signal
Computer signal .................... 0.7Vp-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. The test point exists on Assembly
POWER.
1.
+6V voltage adjustment.
■ The following adjustment is the adjustment item for
Switching Regulator. The test point exists on Unit Sub-
Power.
2.
+25V voltage adjustment.
■ The following adjustment is the adjustment item for
Assembly sub power and Assembly main. The adjustment
data is stored to Assembly main (IC803).
exist on PBS Fannet (Fannet_1), EXH Fannet (Fannet_2),
Lamp Fannet (Fannet_4) and Unit Sub-Power.
3.
Fans driving voltage adjustments.
■ The following adjustments are the adjustment item for
16 steps gray scale pattern (XGA),
100% white pattern (XGA)
50% white pattern (XGA),
1 dot line pattern (UXGA)
16 steps gray scale pattern (1080i/60),
100% white pattern (1080i/60)
50% white pattern (1080i/60)
Assembly main. The adjustment data is stored to Assembly
main (IC803). The test points exist on Assembly MAIN.
■ The following adjustment data is stored to Assembly main
(IC4822).
The test points
z
-74-
16 steps gray scale pattern
White 100%
4.
Video center DC adjustments.
5.
Gain adjustment -PC
6.
Panel driving signal adjustments -PC.
7.
Gain adjustment -AV.
8.
Panel driving signal adjustments -AV.
9.
Common center adjustments.
10.
Gamma shift adjustments -PC.
11.
Gamma shift adjustments -AV.
12.
White balance adjustments.
13.
Unevenness color correction.
Location of test points can see it on
"Printed Wiring Board Drawings."
+6V voltage adjustment
Black 100%
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