-25-
1. Receive the 16-step gray scale computer signal with
Input 1 [RGB(Analog)]
mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TP531
” (+)
and chassis ground (-).
4. Select group no. “
4
”, item no. “
12
” and change data
value to adjust amplitude “
a
” to be
9.8
±0.1V.
(a)
black level
black level
.
PC black Level adjustment
1. Receive the 16-step gray scale video signal with
Input 1 [RGB(Analog)]
mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TP531
” (+) and
chassis ground (-).
4. Select group no. “
4
”, item no. “
9
” and change data
value to adjust amplitude “
a
” to be
4.0
±0.1V.
5. Connect an oscilloscope to test point “
TP561
” (+) and
chassis ground (-).
6. Select item no. “
10
” and change data value to adjust
amplitude “
a
” to be
4.0
±0.1V.
7. Connect an oscilloscope to test point “
TP501
” (+) and
chassis ground (-).
8. Select item no. “
11
” and change data value to adjust
amplitude “
a
” to be
4.0
±0.1V.
(a)
,
PC gamma gain adjustment
1. Receive the 16-step gray scale computer signal with
Input 3 [Video]
mode.
2. Enter the service mode.
3. Connect a digital voltmeter to test point “
TPVRB
” (+)
and chassis ground (-).
4. Select group no. “
5
”, item no. “
17
” and change data
value to adjust the voltage to be
0.70
±0.03Vdc.
⁄0
Video A/D reference voltage (bottom
side) adjustment
1. Receive the black 0% composite video signal with
Input 3 [Video]
mode.
2. Enter the service mode.
3. Select group no. “
5
”, item no. “
11
” and change data
value to adjust the
green
noise on the screen to the
deepest green.
1. Receive the white 100% composite video signal with
Input 3 [Video]
mode.
2. Enter the service mode.
3. Select group no. “
5
”, item no. “
18
” and change data
value to adjust the
magenta
noise on the screen to
the deepest magenta.
1. Receive the black 0% composite video signal with
Input 3 [Video]
mode.
2. Enter the service mode.
3. Select group no. “
5
”, item no. “
12
” and change data
value to adjust the
blue
noise on the screen to the
deepest blue.
4. Select group no. “
5
”, item no. “
13
” and change data
value to adjust the
red
noise on the screen to the
deepest red.
⁄3
Video Cb/Cr pedestal adjustment
Electrical Adjustments
⁄1
Video Y pedestal adjustment
⁄2
Video A/D reference voltage (top
side) adjustment
Summary of Contents for MP-45
Page 60: ...60 IC Block Diagrams BH3540 Volume Control IC1652 BA7078AF Sync Detector IC5304...
Page 64: ...64 IC Block Diagrams LB1641 Motor Drive IC1602 IC1611 LB1645 Motor Drive IC1601...
Page 66: ...66 M62393 D A IC212 M62399 D A IC7801 IC Block Diagrams ML60851 USB Interface IC9801...
Page 108: ...MR3 MP 45t00 Mechanical Parts List 108 68 45 23 24 45 45 45 68 a 68 b 23 b 23 a 23 c 24 a 23 d...
Page 116: ...Diagrams Drawings MR3 MP 45t00...
