Sony DXF-20W, Руководство по обслуживанию

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2-8 (E)
DXF-20W
2-2-7. Vertical Frame Adjustment (For PAL)
m
.
The following is the adjustment of the PAL system video
camera and viewfinder.
. When adjusting the viewfinder used in the NTSC system
video camera, perform the “Adjustment procedure (For
NTSC)”. After the “Adjustment procedure (For NTSC)”,
perform the check or adjustment of the PAL system
again.
Preparation
. Measuring equipment: Waveform monitor
.
Remove the eye cap from the viewfinder.
.
Viewfinder
BRIGHT control
→
Mechanical center
CONTRAST control
→
Mechanical center
PEAKING control
→
Fully counterclockwise
3
Adjustment procedure
1. Attach the viewfinder to the PAL system video
camera.
2. Adjust the lens zoom so that the resolution chart frame
coincides with the underscanned picture frame on the
monitor screen.
3. Set the resolution on the monitor screen to the best
state with the lens focus.
4. Adjust the lens iris so that white level at VIDEO OUT
connector on the camera is 700
±
14 mV.
5. Adjust
1
RV104 (V-SIZE: P)/DF-70 board so that the
V size of resolution chart is underscanned by approxi-
mately 2 mm from the CRT picture frame.
(When
1
RV104 is not adjusted, the adjustment may
not be performed by just
1
RV103. In such case, adjust
1 RV103 after roughly adjusting by 1 RV104.)
Viewfinder screen
Adjustment procedure (For NTSC)
1. Attach the viewfinder to the NTSC system video
camera.
2. Adjust the lens zoom so that the resolution chart frame
coincides with the underscanned picture frame on the
monitor screen.
3. Set the resolution on the monitor screen to the best
state with the lens focus.
4. Adjust the lens iris so that white level at VIDEO OUT
connector on the camera is 100
±
2 IRE.
5. Adjust
1
RV103 (V-SIZE: N)/DF-70 board so that the
V size of resolution chart is underscanned by approxi-
mately 2 mm from the CRT picture frame.
Viewfinder screen
DF-70 board
Approx. 2 mm (V size)
Chart frame
CRT frame
Approx. 2 mm (V size)
Chart frame
CRT frame
RV101 RV102 RV103 RV104 RV105