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PV152
3-5
PRO1200 ADJUSTMENTS
ADJUSTMENTS
SYNC+VERT DEFLECTION MODULE
MAIN BOARD
Remove A/C and install PCB Extension
a. Vertical Hold P1 (Located on Main Module)
Important:
to adjust the Vertical Hold, switch the pro-
jector on the connected source with the highest Ver-
tical frequency. See chart on page **.
Short-circuit the anode of the diode D7 to ground.
Adjust P1 for a slowly rolling up of the picture (ceiling
mounted projector).
Remove the short-circuit.
b. Main Vertical SHIFT adjustment for RED and BLUE
image
Note:These are factory set coarse alignments of ver-
tical shift, to compensate for the shift caused by
the stigmators on the CRT necks. These potenti-
ometers also are used to minimize the range of
the digital potentiometers for the vertical shift,
allowing for a more accurate center convergence.
Preparation
Adjust the vertical raster centering controls for Red and
Blue in their mid position. The numeric indicator
under the respective bar scale indicates 50.
(Refer to the Owner's manual of the projector - Guided
or Random Access Adjustment Mode). Raster is found
under geometry adjustment in Random Access Adjust-
ment Mode.
Use the vertical shift controls P621 for RED and P620
for BLUE to shift vertically the Red and Blue image
until the horizontal center line coincides with this of
the Green image.
c. Vert amplitude correction for RED and BLUE image
Adjust potentiometer P626 for the Red image and P627
for the Blue image to obtain the same vertical ampli-
tude as the Green image.
SMPS
RGB Input & Switch
Sync & Vertical Deflection
Horizontal Deflection
Magentic Focus & H-Shift
Internal
Remote
Control
RGB Analog Auto Sync Input
SMPS 2+G2
EHT
Fig. L
Fig. M
Schematic Reference:
Page: 6-9
Sect: D-9
+12V
R158
10
K
2K
P1
R159
1K
8
C121
C122
100K
10M
R161
1K
7
6
5
C123
1M
R160
100K
IC16
TL084
Fig. N
Schematic Reference:
Page: 6-10
Sect: C-3
R618
R619
R616
R617
15
0E
15
0E
2K
2
2K
2
R622
820K
R625
100K
820K
R624
R623
-12V
100K
100K
100K
P620
P621
VERTICAL
SHIFT
ADJUSTMENT
BLUE
VERTICAL
SHIFT
ADJUSTMENT
RED
Fig. O
Schematic Reference:
Page: 6-10
Sect: B-5
R60
6K8
R302
22K
R626
2K
R628
9K09
C24
680P
-17V
C41
220K
C43
220K
R80
IC11
R132827
1
7
2
6 3
5
VERTICAL AMPLITUDE
ADJUSTMENT RED
4
Fig. P
Schematic Reference:
Page: 6-10
Sect: D-5
R42
6K8
R301
22K
P627
2K
R629
9K09
C57
680P
-17V
1
7
2
6 3
5
IC12
R132827
C56
220K
4
VERTICAL AMPLITUDE
ADJUSTMENT BLUE