Sanyo PLV-80 Series, Service Manual

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Electrical Adjustments
c
Video Center adjustment
1. Receive the 16-step gray scale computer signal with
Input 1 [RGB(Analog)]
mode.
2. Enter the service mode.
3. Connect a digital voltmeter to test point “
TPV1G
” (+)
and chassis ground (-).
4. Select group no. “
200
”, item no. “
0
” and change data
value to adjust the voltage to be
7.0
±0.05Vdc.
5. Connect a digital voltmeter to test point “
TPV1R
” (+)
and chassis ground (-).
6. Select item no. “
1
” and change data value to adjust
the voltage to be
7.0
±0.05Vdc.
7. Connect a digital voltmeter to test point “
TPV1B
” (+)
and chassis ground (-).
8. Select item no. “
2
” and change data value to adjust
the voltage to be
7.0
±0.05Vdc.
n
PC Input adjustment
1. Receive the 16-step gray scale computer signal with
Input 1 [RGB(Analog)]
mode.
2. Enter the service mode.
3. Select group no. “
680
”, item no. “
0
” and change data
value from 0 to 1. The projector starts self-adjust-
ment. When the adjustment completes correctry,
"OK" will appear on the screen. If "NG" appears, try
adjustment again.
v NRS adjustment
1. Receive the 16-step gray scale computer signal with
Input 1 [RGB(Analog)] mode.
2. Enter the service mode.
3. Connect a digital voltmeter to test point “
TPNRSA
” (+)
and chassis ground (-).
4. Select group no. “
200
”, item no. “
3
” and change data
value to adjust the voltage to be
2.5
±0.05Vdc.
5. Connect a digital voltmeter to test point “
TPNRSB
” (+)
and chassis ground (-).
6. Select item no. “
4
” and change data value to adjust
the voltage to be
7.5
±0.05Vdc.
b
Reference Voltages adjustment
1. Receive the 16-step gray scale computer signal with
Input 1 [RGB(Analog)]
mode.
2. Enter the service mode.
3. Connect a digital voltmeter to test point “
TPREF_G
”
(+) and chassis ground (-).
4. Select group no. “
200
”, item no. “
6
” and change data
value to adjust the voltage to be
9.38
±0.05Vdc.
5. Connect a digital voltmeter to test point “
TPREG_R
”
(+) and chassis ground (-).
6. Select item no. “
7
” and change data value to adjust
the voltage to be
9.38
±0.05Vdc.
7. Connect a digital voltmeter to test point “
TPREF_B
”
(+) and chassis ground (-).
8. Select item no. “
8
” and change data value to adjust
the voltage to be
9.38
±0.05Vdc.
m
A/V Input adjustment
1. Receive the 16-step grey scale comosite video signal
with
Input 3 [Video]
mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TP35G
” (+)
and chassis ground (-).
4. Select group no. “
300
”, item no. “
2
” and adjust the
amplitude “a” to be
minimum
by changing the Data
value.
5. Receive the 16-step grey scale component video
signal (Y/Cb/Cr 480p) with
Input 3 [Y,Pb/Cb,Pr/Cr]
mode.
6. Select group no. “
300
”, item no. “
0
” and adjust the
amplitude “a” to be
minimum
by changing the Data
value.
7. Receive the 16-step grey scale component video sig-
nal (Y/Pb/Pr 1080i-60) with
Input 3 [Y,Pb/Cb,Pr/Cr]
mode.
8. Select item no. “
0
” and adjust the amplitude “a” to be
minimum
by changing the Data value.
9. Receive the 16-step grey scale component video sig-
nal (Y/Pb/Pr 720p-60) with
Input 3 [Y,Pb/Cb,Pr/Cr]
mode.
10. Select item no. “
0
” and adjust the amplitude “a” to
be
minimum
by changing the Data value.
11. Receive the 16-step grey scale component video sig-
nal (Y/Pb/Pr 720p-60) with
Input 3 [Y,Pb/Cb,Pr/Cr]
mode.
12. Select item no. “
0
” and adjust the amplitude “a” to
be
minimum
by changing the Data value.
(a)
White Level