Sony DVCAM DSR-250 Service Manual page 121

2-2. Viewfinder System Adjustment
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 : 1RV14 (OP-ADJ)/MAIN board
6.0 ± 0.5 Vdc
Specification :
MAIN BOARD
CN8
CN5
CN6
CN4
CN2 CN3
2-6 (E)
RV14
RV1
– COMPONENT SIDE –
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 1RV23 (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.
SUB BOARD
R76
RV14
RV23 RV6
S4
RV5
MAIN BOARD
CN7
TP13
TP12 TP1
CN9
RV20
RV24
RV22
S3 S1
– COMPONENT SIDE –
TP4
TP5
TP6
TP8 TP9
TP7
TP10 TP11
TP3
TP2
– SOLDERING SIDE –
DXF-801/801CE