Read Sony SAL70200G2 Service Manual online
5-16
SAL70200G2 (2.8/70-200 G SSM Ⅱ) (70-200mm F2.8 G SSM II)
2. Checking procedure
1) Set the focus to the over infinity end.
2) Check the conduction between 1st pattern and 2nd pattern from the top with the tester as shown in Fig. 5-8-10.
1) Set the focus to the over infinity end.
2) Check the conduction between 1st pattern and 2nd pattern from the top with the tester as shown in Fig. 5-8-10.
No conduction: OK (The contact portion A of brush is on the cut portion of pattern B.)
Conduction:
NG (The contact portion A of brush is not on the cut portion of pattern B.)
Brush Holder
Set the focus to infinity end.
DV Encoder Flexible PC Board
Washer
Check the conduction
between patterns.
between patterns.
A
B
Fig.
5-8-10
3) If the adjustment fails, perform 3. Adjusting procedure .
3. Adjusting procedure
1) Loosen the two screws and adjust the brush position horizontally so that the contact portion A of the brush comes on the cut portion of
1) Loosen the two screws and adjust the brush position horizontally so that the contact portion A of the brush comes on the cut portion of
pattern B or adjust the thickness with washers, and then retry step 2) in the 2. Checking procedure .
2) After this adjustment, touch the focus at the over infinity end more strongly and weakly than usual and confirm that the adjusted por-
tion does not shift.
3) Apply the adhesive bond (B-10) to the heads of two screws.
Apply the adhesive bond (B-10)
A Encoder Brush
Fig.
5-8-11
5-8-2. MR Adjustment/Checking
1. Checking procedure
1) Click [Start[Ent]] on the main screen.
2) SSM frequency input screen is displayed. Make sure that the number (upper three digits) written in the flexible wire of the ultrasonic
1) Click [Start[Ent]] on the main screen.
2) SSM frequency input screen is displayed. Make sure that the number (upper three digits) written in the flexible wire of the ultrasonic
motor (stator) is displayed.
Example: In case the number written in the flexible wire is 207 .
207076
Fig.
5-8-12
3) When no problem is found in [Adjust & Check MR], OK appears.
Fig.
5-8-13
4) If the [NG] button is displayed, perform the 2. Adjustment procedure (MR sensor height adjustment) .
2. Adjustment procedure (MR sensor height adjustment)
If the check result of the MR sensor is abnormal, perform the following procedure to adjust the MR sensor height.
If the check result of the MR sensor is abnormal, perform the following procedure to adjust the MR sensor height.
1) Install the MR sensor with only one MR spacer (thickness: 0.07 mm).
MR spacer
Part No.
Thickness (mm)
4-450-989-01
0.05
4-450-989-11
0.07
4-450-989-21
0.10
4-450-989-31
0.20
Table
5-8-1
MR Sensor
MR Spacer
Fig.
5-8-14
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