Sony BVP-550, Руководство по обслуживанию

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4-23 (E)
BVP-550
BVP-550P
4-3-4. Focus Adjustment
Note:
• This adjustment, “4-3-5. Heater Voltage Adjustment”
and “4-3-6. Picture Frame Adjustment” affect each other.
Therefore, repeat these three adjustments until these
specifications are satisfied.
Equipment : Waveform monitor
Object
: Resolution chart
Preparations:
Shoot the resolution chart so that the chart frame is aligned
with the underscanned monitor frame.
(Viewfinder Monitor)
Adjust the iris of the lens so that the output level at VIDEO
OUT connector satisfies the level A.
A = 70
±
2 IRE (for NTSC)
A = 490
±
14 mV (for PAL)
BRIGHT control (on the viewfinder)
→
mechanical center
CONTRAST control (on the viewfinder)
→
mechanical
center
Adjustment procedures:
Measurement point
: viewfinder
Adjustment point
:
1
RV2 (ANODE SET)/VF-60
Specifications : Turn
1
RV2 fully counterclock-
wise, and slowly turn it clockwise
to adjust the best focus position.
Note:
After adjustment is completed, confirm that the focus
operation can be performed irrespective of its BRIGHT
and CONTRAST controls setting.
4-3-5. Heater Voltage Adjustment
Note:
• This adjustment, “4-3-4. Focus Adjustment” and “4-3-6.
Picture Frame Adjustment” affect each other. Therefore,
repeat these three adjustments until these specifications
are satisfied.
Equipment : Digital voltmeter
Preparations:
BRIGHT control (on the viewfinder)
→
mechanical center
CONTRAST control (on the viewfinder)
→
mechanical
center
PEAKING control (on the viewfinder)
→
mechanical
center
Test point : CN5-4pin/VF-60 board
CN5-5pin/VF-60 board
Adjustment point
:
1
RV8 (HEATER)/VF-60
Specifications : 700
±
10 mV dc
5
1
RV3
RV4
RV5
RV9 RV8
TP5
CN2
TP4
CN5
RV1
RV2
TP1
CN1
TP2
RV6 RV10 RV7
TP3
CN4
E1
VF-60 BOARD (A SIDE)
4-3. Viewfinder System Adjustment