Sony DSR-250, Service Manual

Page: 295 / 322

2-6 (E)
DXF-801/801CE
2-2-8. Bright Calibration Adjustment
Preparation
[DSR-250/250P]
. MODE switch
→
VTR
After adjustment, reset to “CAMERA” position.
. Connect a pattern generator to VIDEO IN/OUT jack and
input a white 100% color bar signal.
[Viewfinder]
.
BRIGHT control
→
Fully counterclockwise
3
.
CONTRAST control
→
Fully counterclockwise
3
Adjustment Procedure
Adjust the picture by turning
1
RV23 (SUB-BRIGHT)/
SUB board clockwise
2
from fully counterclockwise
3
position so that the picture of the white (100%) part just
appears on the monitor screen.
2-2-7. Operational Amplifier Output
Adjustment
Note
When this adjustment is carried out, “2-2-5. Focus
Adjustment” and “2-2-2. Heater Voltage Pre-Adjustment”
must be confirmed again.
Equipment :
Digital voltmeter
Preparation
[DSR-250/250P]
.
IRIS switch
→
MAN
.
Lens iris
→
Close “C”
[Viewfinder]
.
BRIGHT control
→
Fully counterclockwise
3
.
CONTRAST control
→
Fully counterclockwise
3
.
PEAKING control
→
Fully counterclockwise
3
Test point : TP12/MAIN board
Adjusting point :
1
RV14 (OP-ADJ)/MAIN board
Specification : 6.0
±
0.5 Vdc
– COMPONENT SIDE –
SUB BOARD
CN9
S3 S1
RV20
RV24 RV14
RV23 RV6
RV5
R76
S4
RV22
– COMPONENT SIDE –
MAIN BOARD
CN8
RV15
RV8
RV7
RV2 RV3
CN5
CN4
CN3
CN6
CN2
RV14
RV4
RV1
– SOLDERING SIDE –
MAIN BOARD
CN7
TP1 TP12
TP13
TP4
TP5
TP6
TP7
TP8 TP9
TP10
TP3
TP2
TP11
2-2. Viewfinder System Adjustment