Picture Frame Adjustment - Sony BVP-550 Maintenance Manual

4-3. Viewfinder System Adjustment

4-3-6. Picture Frame Adjustment

Note:
• This adjustment, "4-3-4. Focus Adjustment" and "4-3-5.
Heater Voltage Adjustment" affect each other. There-
fore, repeat these three adjustments until these specifica-
tions are satisfied.
Equipment : Oscilloscope
Object : Resolution chart
Preparations:
BRIGHT control (on the viewfinder) → mechanical center
CONTRAST control (on the viewfinder) → mechanical
center
PEAKING control (on the viewfinder) → mechanical
center
Shoot the resolution chart so that the chart frame is aligned
with the underscanned monitor frame.
(Viewfinder Monitor)
Adjustment procedures:
Step 1.
Measurement point : viewfinder
: 1RV3 (H HOLD)/VF-60
Adjustment point
Specifications
: If the upper left corner of the
picture is distorted, makes right
angle.
(Waveform Monitor)
Step 2.
Measurement point : Viewfinder
: 1RV7 (V LIN)/VF-60
Adjustment point
Specifications
: Minimize the distortion of the
four circles at the corners of the
resolution chart.
4-24 (E)
Step 3.
Measurement point : Viewfinder
: 1RV1 (H SIZE)/VF-60
Adjustment point
1RV6 (V SIZE)/VF-60
1Centering magnet
: Adjust 1RV1 (H SIZE) and
Specifications
1RV6 (V SIZE) so that the
position of the resolution chart
are as shown below.
Turn the centering magnet only
when the left and lower corners
cannot be adjusted.
(Viewfinder Monitor)
Step 4.
Place the VF tube to the lower chassis as shown below,
and confirm that the picture is in the center of the view-
finder in the normal installing position.
Centering Magnet
E1
RV9
RV5
RV3
RV4
TP2
RV7 RV10 RV6
TP3
CN4
VF-60 BOARD (A SIDE)
TP5
RV8
TP4
CN2
CN5
RV1
CN1
RV2
TP1
BVP-550
BVP-550P