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I Adjustment
I ELECTRICAL ADJUSTMENTS
1. Fan driving voltage adjustment
Equipment
Test point
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
Test Point
Input mode
Input Signal
Enter the Service mode.
Adjust values of below items by the Volume + or - buttons.
Item no.
Adjustment part
22
DC level-A in a figure 2.1 ± 0.1 V-DC.
23
DC level-B in a figure 12.0 ± 0.5 V-DC.
A
GND
Digital voltmeter.
TP66A
Oscilloscope
TP-NRS1
Computer
16 step gray scale signal
Adjustment value
( for LC-XM2 )
3.0 ± 0.1 V-DC.
( for LC-SM3 )
B
3. Signal center DC adjustments
Equipment
Input mode
Input Signal
Enter the Service mode.
Adjust each values of below test point to be minimum
amplitude by the Volume + or - buttons.
Item no.
Test Point
1
TP-R1
2
TP-G1
3
TP-B1
4. Contrast adjustments
Equipment
Input Signal
Enter the Service mode.
Adjust each values of below test points in the figure (Part
A) by the Volume + or - buttons.
1-1 Input mode
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
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
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
-14-
Digital voltmeter.
Computer
16 step gray scale signal
Adjustment value
7.3 ± 0.05 V-DC.
7.3 ± 0.05 V-DC.
7.3 ± 0.05 V-DC.
Oscilloscope
16 step gray scale signal
Computer
AV (NTSC)
Component (480)
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