Sony SAL70200G (serv.man2) Service Manual ▷ View online
5-35
SAL70200G (2.8/70-200 G) (70-200mm F2.8 G)
5-7.
FOCUS BUSH (A ENCODER BRUSH) ADJUSTMENT
Equipment
• Adhesive bond (B-10)
1. Preparation
1)
Disassemble the lens unit to the state shown in Fig.5-7-1.
Fig.5-7-1
Focus Brush(A Encoder Brush)
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SAL70200G (2.8/70-200 G) (70-200mm F2.8 G)
2. Adjusting Method
1)
Set the focus to the infinity end.
2)
Check the conduction between 1st pattern and 2nd pattern from the top with the tester as shown in Fig.5-7-2.
• It does not conduct when the brush locates at the cut portion of pattern
O. (Adjustment: OK)
• It conducts when the brush does not locate at the cut portion of pattern
O. (Adjustment: NG)
Fig.5-7-2
3)
If the adjustment is NG in step 2), loosen two screws and adjust the position of A encoder brush in the right or left direction or the
thickness using several washers so that the curved part of A encoder brush comes to the
O part, and perform step 2) again.
4)
After adjusted, touch the focus to the infinity more strongly and weakly than normal and confirm that the adjustment end does not
shift.
5)
Apply the adhesive bond (B-10) to the heads of two screws.
Fig.5-7-3
R part of
A encoder brush
A encoder brush
Brush Holder
Set the focus to infinity end.
DV Encoder Flexible PC Board
Washer
Check the conduction
between patterns.
between patterns.
Apply the adhesive bond (B-10)
A Encoder Brush
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SAL70200G (2.8/70-200 G) (70-200mm F2.8 G)
5-8.
ULTRASONIC MOTOR HEIGHT ADJUSTMENT
Equipment
• Height adjustment JIG (Ring)
• Height adjustment JIG (Cap)
•
SSM Height ADJ harpoon JIG
•
SSM Height adjustment measurement JIG
• Adhesive bond (B-10)
1. Preparation
Make the lens unit in the state that the USM holder ring and spring are removed from the lens unit in the Fig.5-8-1.
Fig.5-8-1
USM Holder Ring
Spring
Ver. 1.2 2008.06
The changed portions from
Ver. 1.1 are shown in blue.
Ver. 1.1 are shown in blue.
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SAL70200G (2.8/70-200 G) (70-200mm F2.8 G)
2. Adjusting Method
1)
After assembling the pressure plate, place the lens, facing the flexible card toward you.
2)
Set the height adjustment JIG (ring) and the height adjustment JIG (cap) on the pressure plate.
3)
Set the weight on the height adjustment JIG (cap). Push down the weight and lift up lightly the weight. (To stabilize the height)
Note:
The SSM Height ADJ Harpoon JIG, to become as follows weight is adjusted.
SSM Height ADJ Harpoon JIG = 1600g - Height adjustment JIG (Cap) - Height adjustment JIG (Ring)
4)
Touch the
SSM Height adjustment measurement JIG
in the depth of height adjustment JIG (cap) and set the dial to “0”.
Fig.5-8-2
5)
Remove the
SSM Height adjustment measurement JIG, SSM Height ADJ Harpoon JIG
and the height adjustment JIG.
6)
Install the spring and the USM holder ring.
Note 1:
Be careful of the shift of sheet and catching the spring
Note 2:
To perform the ultrasonic motor height adjustment, do not tighten the USM holder ring too much.
Pressure Plate
Stator
Height Adjustment JIG (Cap)
Height Adjustment
JIG (Cap)
JIG (Cap)
Height Adjustment JIG (Ring)
Height Adjustment
JIG (Ring)
JIG (Ring)
SSM Height Adjustment
Measurement JIG
Measurement JIG
SSM Height ADJ
Harpoon JIG
Harpoon JIG
SSM Height ADJ
Harpoon JIG
Harpoon JIG
Ver. 1.2 2008.06
The changed portions from
Ver. 1.1 are shown in blue.
Ver. 1.1 are shown in blue.
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