Sony DXF-20W, Service Manual

Page: 19 / 36

2-9 (E)
DXF-20W
Centering magnet
Top chassis
VF tube
2-2-9. Vertical Linearity Adjustment
Preparation
. Measuring equipment: Waveform monitor
. 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
coincides with 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 lens iris so that the white level at VIDEO
OUT connector on the camera is as follows.
For NTSC: 100
±
2 IRE
For PAL: 700
±
14 mV
4. Adjust 1 RV105 (V-LIN)/DF-70 board so that each
circle at the four corners of resolution chart is the
perfect circle (symmetrical in top and bottom).
2-2-8. Screen Centering Check
Note
When performing the centering magnet adjustment in the
check of this section, perform “2-2-3. Horizontal Frame
Adjustment” and “2-2-7. Vertical Frame Adjustment”.
Preparation
.
Measuring equipment: Waveform monitor
.
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
coincides with 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 lens iris so that the white level at VIDEO
OUT connector on the camera is as follows.
For NTSC: 100
±
2 IRE
For PAL: 700
±
14 mV
4. Push the VF tube against the top chassis on the
horizontal position as shown in the illustration below.
Check that the image is in the center when it is viewed
through the viewfinder in the normal state.
If the image is not in the center, perform the centering
magnet adjustment to adjust the image to the center.
RV101 RV102 RV103 RV104 RV105
DF-70 board