Electrical Adjustments - Sanyo PLC-SW20A Service Manual

■ Adjustment

■ ELECTRICAL ADJUSTMENTS

1. Fan driving voltage adjustment
Equipment
Test point
Enter the Service mode.
1. Set the item no. to [76] by pressing the Point up or down
button.
1
Set the data value to
button.
2. Set the item no. to [94]. Set the data value to
3. Adjust the voltages of TP66A to 8.4 ± 0.1 V-DC by the
VR5601.
4. Set the item no. to [76]. Set the data value to
5. Set the item no. to [94]. Set the data value to
2. PSIG adjustments
Equipment
Test Point
Input mode
Input Signal
Enter the Service mode.
Adjust values of below items by the Volume + or - button.
Item no. Adjustment part
22 DC level-A in a figure 3.8 ± 0.1 V-DC.
23 DC level-B in a figure 10.0 ± 0.5 V-DC.
A
Digital voltmeter.
TP66A
by pressing the Volume + or -
1
.
0
.
1
.
Oscilloscope
TP-SIG1
Computer
16 step gray scale signal
Adjustment value
B
3. Signal center DC adjustments
Equipment
Input mode
Input Signal
Enter the Service mode.
Adjust below values of each test points by the Volume + or
- button.
Item no. Test Point
1 TP-R1
2 TP-G1
3 TP-B1
4. Sub Gain (Contrast) adjustments
Equipment
Input Signal
Enter the Service mode.
Adjust each values of below test point to be minimum
amplitude by the Volume + or - button.
4-1 Input mode
Item no. Test Point
4 TP-R1 (Red contrast of PC)
5 TP-G1 (Green contrast of PC)
6 TP-B1 (Blue contrast of PC)
4-2 Input mode
Item no. Test Point
4 TP-R1 (Red contrast of AV)
5 TP-G1 (Green contrast of AV)
6 TP-B1 (Blue contrast of AV)
4-3 Input mode
Item no. Test Point
4 TP-R1 (Red contrast of Component)
5 TP-G1 (Green contrast of Component)
6 TP-B1 (Blue contrast of Component)
A
-13-
Digital voltmeter.
Computer
16 step gray scale signal
Adjustment value
7.5 ± 0.05 V-DC.
7.5 ± 0.05 V-DC.
7.5 ± 0.05 V-DC.
Oscilloscope
16 step gray scale signal
Computer
AV (NTSC)
Component (480)