Focus Adjustment - Sony DSR-250 Service Manual

2-2. Viewfinder System Adjustment

2-2-5. Focus Adjustment

Note
. "2-2-6. Picture Frame 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]
. BRIGHT control → Mechanical center
. CONTRAST control → Fully clockwise 2
. PEAKING control → Fully counterclockwise 3
Adjustment Procedure
1. Adjust the lens zoom so that the resolution chart
frame coincides the underscanned picture frame on
the monitor screen.
2. Set the resolution on the monitor screen to the best
state with the lens focus.
Monitor Screen
3. Adjust the iris control for the white level at VIDEO
OUT connector on the camera is 100 ± 2 IRE (PAL :
700 ± 14 mV).
4. Adjust 1RV3 (FOCUS)/MAIN board so that the
picture on the viewfinder screen is best focused.
2-4 (E)
MAIN BOARD
CN8
CN5
CN6
CN4
CN2 CN3
RV1 RV14
– COMPOMENT SIDE –
DXF-801/801CE