-14-
■
Adjustment
■
ELECTRICAL ADJUSTMENTS
1. Fan driving voltage adjustment
Equipment
Digital voltmeter.
Test point
TP66A
Enter the Service mode.
1. Set the item no. to [50] by pressing the Point up or down
button.
Set the data value to [1] by pressing the Volume + or -
button.
2. Set the item no. to [67]. Set the data value to [1].
3. Adjust the voltages of TP66A to 8.4 ± 0.1 V-DC by the
VR5601.
4. Set the item no. to [50]. Set the data value to [0].
5. Set the item no. to [67]. Set the data value to [1].
2. NRS adjustments
Equipment
Oscilloscope
Test Point
TP-NRS1
Input mode
Computer
Input Signal
16 step gray scale signal
Enter the Service mode.
Adjust values of below items by the or - buttons.
Item no.
Adjustment part Adjustment value
22
DC level-A in a figure
2.1 ± 0.1 V-DC.
( for PLC-XW20 )
3.0 ± 0.1 V-DC.
( for PLC-SW20 )
23
DC level-B in a figure
12.0 ± 0.5 V-DC.
A
B
GND
3. Signal center DC adjustments
Equipment
Digital voltmeter.
Input mode
Computer
Input Signal
16 step gray scale signal
Enter the Service mode.
Adjust each values of below test point to be minimum
amplitude by the or - buttons.
Item no.
Test Point
Adjustment value
1
TP-R1
7.3 ± 0.05 V-DC.
2
TP-G1
7.3 ± 0.05 V-DC.
3
TP-B1
7.3 ± 0.05 V-DC.
4. Contrast adjustments
Equipment
Oscilloscope
Input Signal
16 step gray scale signal
Enter the Service mode.
Adjust each values of below test points in the figure (Part
A) by the or - buttons.
1-1
Input mode
Computer
Item no.
Test Point
7
TP-R1 (Red contrast of PC)
8
TP-G1 (Green contrast of PC)
9
TP-B1 (Blue contrast of PC)
1-2
Input mode
AV (NTSC)
Item no.
Test Point
7
TP-R1 (Red contrast of AV)
8
TP-G1 (Green contrast of AV)
9
TP-B1 (Blue contrast of AV)
1-3
Input mode
Component (480)
Item no.
Test Point
7
TP-R1 (Red contrast of Component)
8
TP-G1 (Green contrast of Component)
9
TP-B1 (Blue contrast of Component)
A
