PV152
3-10
PRO1200 ADJUSTMENTS
ADJUSTMENTS
3. Connect one probe of the double beam oscilloscope
to the RED_IN signal and the other to RED_OUT, pin 1
of the board connector J250.
4. Adjust the potentiometer P200 for a signal aspect
ratio In/Out of 1.
5. Connect one probe of the double beam oscilloscope
to the GREEN_IN signal and the other to GREEN_OUT,
pin 1 of the board connector J350.
6. Adjust the potentiometer P300 for a signal aspect
ratio In/Out of 1.
7. Connect one probe of the double beam oscilloscope
to the BLUE_IN signal and the other to BLUE_OUT,
pin 1 of the board connector J450.
8. Adjust the potentiometer P400 for a signal aspect
ratio In/Out of 1.
RGB OUTPUT
Adjustment procedure
1. Supply an external signal to the projector (e.g. a color
bar signal)
2. Connect the first measuring probe to the video input
signal, testpoint TP1 'VIDEO_IN'.
3. Adjust the customers brightness control until the DC
blacklevel of the video input signal reaches 2V.
4. Adjust the customer contrast control until the video
input signal information reaches an amplitude of
2.35V.
Adjustments
Adjustment of the +200V (Regulated Power Supply)
1. Connect a voltmeter to the Emitter of Q14.
2. Adjust the potentiometer P3 for +200V on MP8.
Adjustment of the signal GAIN for each output Am-
plifier
3. Connect the oscilloscope probe to the base of Q4
'VIDEO OUT'
4. Adjust the potentiometer P1 for an amplitude of the
output signal of 100Vpp
Fig. GG
R329
P300
Gain Green
Adjustment
20
0E
R330
R328
C311
2p7
C310
6p8
R327
I300
HFA1100
47
0E
82
0E
22
0E
1K
8
Schematic Reference:
Page: 6-44
Sect: E-7
Fig. HH
R429
P400
Gain Blue
Adjustment
20
0E
R430
R428
C411
2p7
C410
6p8
R427
I400
HFA1100
47
0E
82
0E
22
0E
1K
8
Schematic Reference:
Page: 6-47
Sect: E-7
R229
P200
Gain Red
Adjustment
20
0E
R230
R228
C211
2p7
C210
6p8
R227
I200
HFA1100
47
0E
82
0E
22
0E
1K
8
Fig. FF
Schematic Reference:
Page: 6-45
Sect: E-7
Fig. II
Schematic Reference:
Page: 6-55
Sect: F-5
C24
100P
R89
47K
22
0K
R91
P3
2K
R92
10
K
-5V
ADJUST FOR
+200V ON MP8
IC6
TL082
3
1
2
-
+
Fig. JJ
Schematic Reference:
Page: 6-55
Sect: D-4
R16
47E
Q2
BFS17
R17
1K
P1
2K
47
K
22
K
R30
R18
GAIN
ADJUSTMENT
