Steady Shot Adjustment - Sony MVC-FD97 Service Manual

20. Steady shot adjustment

• Perform the steady shot adjustment only when replacing the
angular velocity sensor. When the microprocessor, circuit, etc.
malfunctions, do not perform this adjustment but check opera-
tions only.
• Record the sensitivity label of the angular velocity sensor (re-
pair part), including to which side of the board it was attached
to, etc. If it has been attached incorrectly, the image will move
up and down or to the left and right during steady shot opera-
tion. Be sure to take note of this.
Precautions on the Parts Replacement
There are two types of repair parts.
Type A ENC03JA
Type B ENC03JB
Replace the broken sensor with a same type sensor. If replace with
other type parts, the image will vibrate up and down or left and
right during hand-shake correction operations. After replacing,
readjust according to the adjusting method after replacement.
Precautions on Angular Velocity Sensor
The sensor incorporates a precision oscillator. Handle it with care
as if it dropped, the balance of the oscillator will be disrupted and
operations will not be performed properly.
Switch setting:
1) Steady shot (FRONT SW block) ........................... ON
20-1. Steady Shot Adjustment (1)
Mode
Subject
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Pattern A
A4 size (297 mm × 210 mm)
Fig. 5-1-20
CAMERA
Pattern A
(1.5 m from the front of protection
glass)
Video output terminal
Oscilloscope (H period)
F
AD
Adjusting method:
Order Page Address Data
1
2
3 0 01
4 B FF
5
6
7
8 B FF
9
10
11
12
13 F AD
14 B FF
Note 1: The Yaw sensor sensitivity (SE151 of CD-311 board) is
labeled only on the repair parts.
Note 2: Refer to table 5-2-2. "Hexadecimal- decimal conversion
table".
Processing after Completing Adjustment
Order Page Address Data
1 0 01
2
3
5-34
Procedure
Expose pattern A with the zoom
TELE end.
Adjust the inclination of the
camera so that the vertical black
line comes to the center of the
screen.
01
08 Press PAUSE button.
Turn off the HOLD switch.
Adjust to the falling edge of the
waveform with vertical scale on
the oscilloscope.
(Oscilloscope is H period.)
Turn on the HOLD switch.
Press PAUSE button. At this time,
measure the moving amount t1
09
(µ sec) of the falling edge of the
waveform.
Turn off the HOLD switch.
Obtain D 'using the following
AD
equation
(decimal calculation)
' = (4.0 / t1) × {1.01 / (Yaw
D
AD
sensor sensitivity) } × 94
(Note 1)
Raise D ' to a whole number,
AD
convert it to a hexadecimal digit
and take this as D . (Note 2)
AD
Turn on the HOLD switch.
D Press PAUSE button.
AD
08 Press PAUSE button.
Procedure
00
Turn off the HOLD switch.
Check that the steady shot
operation is performed normally.