Sanyo PLV-75 Service Manual page 25

Electrical Adjustments
Video Center adjustment
c
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 "
and chassis ground (-).
200
4. Select group no. " ", item no. "
value to adjust the voltage to be
5. Connect a digital voltmeter to test point "
and chassis ground (-).
1
6. Select item no. " " and change data value to adjust
7.0
the voltage to be ±0.05Vdc.
7. Connect a digital voltmeter to test point "
and chassis ground (-).
2
8. Select item no. " " and change data value to adjust
7.0
the voltage to be ±0.05Vdc.
NRS adjustment
v
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 "
and chassis ground (-).
200
4. Select group no. " ", item no. "
value to adjust the voltage to be
5. Connect a digital voltmeter to test point "
and chassis ground (-).
4
6. Select item no. " " and change data value to adjust
7.5
the voltage to be ±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 "
(+) and chassis ground (-).
200
4. Select group no. " ", item no. "
value to adjust the voltage to be
5. Connect a digital voltmeter to test point "
(+) and chassis ground (-).
7
6. Select item no. " " and change data value to adjust
9.38
the voltage to be
7. Connect a digital voltmeter to test point "
(+) and chassis ground (-).
8
8. Select item no. " " and change data value to adjust
9.38
the voltage to be
TPV1G
0
" and change data
7.0
±0.05Vdc.
TPV1R
TPV1B
TPNRSA
3
" and change data
2.5
±0.05Vdc.
TPNRSB
TPREF_G
6
" and change data
9.38
±0.05Vdc.
TPREG_R
±0.05Vdc.
TPREF_B
±0.05Vdc.
PC Input adjustment
n
1. Receive the 16-step gray scale computer signal with
Input 1 [RGB(Analog)] mode.
2. Enter the service mode.
" (+) 3. Select group no. "
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.
" (+)
" (+)
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 "
and chassis ground (-).
4. Select group no. "
amplitude "a" to be
value.
5. Receive the 16-step grey scale component video
signal (Y/Pb/Pr 480p) with Input 3 [Y,Pb/Cb,Pr/Cr]
mode.
6. Select group no. "
amplitude "a" to be
" (+)
value.
7. Receive the 16-step grey scale component video sig-
nal (Y/Cb/Cr 1080i-60) with Input 3 [Y,Pb/Cb,Pr/Cr]
mode.
" (+)
8. Select item no. "
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. "
minimum
be
11. Receive the 16-step grey scale component video
signal (Y/Cb/Cr 480i) with Input 3 [Y,Pb/Cb,Pr/Cr]
mode.
12. Select item no. "
"
minimum
be
"
(a)
"
-25-
680 0
", item no. " " and change data
TP35G
300 2
", item no. " " and adjust the
minimum
by changing the Data
300 0
", item no. " " and adjust the
minimum
by changing the Data
0
" and adjust the amplitude "a" to be
0
" and adjust the amplitude "a" to
by changing the Data value.
0
" and adjust the amplitude "a" to
by changing the Data value.
White Level
" (+)