Picture Frame Adjustment - Sony DSR-250 Service Manual

2-2-6. Picture Frame Adjustment

Note
. "2-2-5. Focus Adjustment", "2-2-7. Operational Amplifi-
er Output Adjustment" and this adjustment affect each
other. Repeat these adjustments until both specifications
are met.
. When these adjustments are carried out, "2-2-2. Heater
Voltage Pre-Adjustment" must be confirmed again.
Object :
Resolution chart
Equipment : Waveform monitor
Preparation
[DSR-250/250P]
. IRIS switch → MAN
[Viewfinder]
. Remove the eye cap from the viewfinder.
. BRIGHT control → Mechanical center
. CONTRAST control → Mechanical center
. PEAKING control → Fully counterclockwise 3
Adjustment Procedure
1. Adjust the lens zoom so that the resolution chart
frame touches the underscanned picture frame on the
monitor screen.
2. Set the resolution on the monitor screen to the best
state with the lens focus.
3. Adjust the iris control for the white level at VIDEO
OUT connector on the camera is 100 ± 2 IRE (PAL :
700 ± 14 mV).
Monitor Screen
DXF-801/801CE
4. Adjust 1RV2 (H-SIZE)/MAIN board so that the H
size of resolution chart is underscanned by approxi-
mately
2 mm from the CRT picture frame.
5. Adjust 1RV7 (V-SIZE)/MAIN board so that the V
size of resolution chart is underscanned by approxi-
mately 2 mm from the CRT picture frame.
Viewfinder Screen
2 mm
6. Adjust 1RV8 (V-LIN)/MAIN board so that the
distortion of each circle at the four corners of resolu-
tion chart is minimized.
7. Repeat procedure 4 to 6 until the specification are met.
8. Select ON mode from 16:9 WIDE on the CAMERA
SET menu.
9. Adjust 1RV15 (V-SIZE : WIDE)/MAIN board so that
the circle in the center of resolution chart becomes a
circle.
10. Select OFF mode from 16:9 WIDE on the CAMERA
SET menu.
11. Confirm that the procedure 5 and procedure 6.
If not met, readjust the procedure 4 through procedure
10.
MAIN BOARD
CN8
CN5
CN6
CN4
CN2
CN3
2-2. Viewfinder System Adjustment
2 mm
Chart Frame
CRT Picture Frame
RV1 RV14
– COMPONENT SIDE –
2-5 (E)