Electrical Adjustments - Sanyo PLC-EF30 Service Manual

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Electrical adjustments

Note :
■ The following adjustment is the adjustment item for Assembly power.
The test point exists on the Assembly power.
1. Voltage adjustment.
■ The following adjustments are the adjustment item for Terminal
board-AV. The adjustment data is stored to Terminal board-AV
(IC2143). The test points exist on the Terminal board-AV and the
Assembly main.
2. AV Video signal adjustments.
3. 3DNR-PLL Lock check.
4. AV Color and Tint adjustments.
■ The following adjustment is the adjustment item for Terminal board
component. The adjustment data is stored to Terminal board-component
(IC2082). The test points exist on the Terminal board component and
the Assembly main.
5. Component Video signal adjustments.
■ The following adjustment is the adjustment item for Assembly sub
power. But the adjustment data is stored to Assembly main (IC1811 and
IC871). The test points exist on the Assembly optical fan-net and the
Assembly sub-power.
6. Fans driving voltage adjustments.
■ The following adjustments are the adjustment item for Assembly main.
The adjustment data is stored to Assembly main (IC1811 and IC871). The
test points exist on the Assembly main.
7. Video center DC adjustments.
8. PSIG signal adjustments.
9. PC pedestal level adjustments.
10. PC contrast adjustments.
11. AV pedestal level adjustment.
12. AV contrast adjustments.
13. Panel driving signal adjustments -AV.
14. Panel driving signal adjustments -PC.
15. Flicker reduction.
16. White balance adjustments.
Location of test points can see it on
"PWB parts location diagrams."
1. Voltage adjustment
Equipment
Connections
Adjustment:
Adjust the voltage of K6D to 6.35± 0.05V DC with the VR652.
2. AV Video signal adjustments
Equipment
Input mode
Input signal
Picture condition
Set the image to "Service mode."
2-1. AV Green Video adjustment
Connections :
Adjust each item for below values with the Volume + and - buttons.
Adjustment part.
Group No.
1010- 0 Amplitude-A in a figure.
1010- 1 Pedestal level and black level.
2-2. AV Red Video adjustment
Connections :
Adjust each item for below values with the Volume + and - buttons.
Adjustment part.
Group No.
1010- 2 Amplitude-A in a figure.
1010- 3 Pedestal level and black level.
2-3. AV Blue Video adjustment
Connections :
Adjust each item for below values with the Volume + and - buttons.
Adjustment part.
Group No.
1010- 4 Amplitude-A in a figure.
1010- 5 Pedestal level and black level.
A
-38-
Digital voltmeter
+ K6D(2)
- chassis ground
Oscilloscope
AV
16 step gray scale signal
Normal
+ TP211 or TP5182 / - chassis ground.
Adjustment or adjustment value.
0.7± 0.05Vp-p
Make it the same level.
+ TP201 or TP5181 / - chassis ground.
Adjustment or adjustment value.
0.7± 0.05Vp-p
Make it the same level.
+ TP221 or TP5183 / - chassis ground.
Adjustment or adjustment value.
0.7± 0.05Vp-p
Make it the same level.
Pedestal
Level
Black Level