SAL70200G2 - Sony Digital Camera Service Manual (repair manual). Page 25

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SAL70200G2 (2.8/70-200 G SSM Ⅱ) (70-200mm F2.8 G SSM II)

Selection of focus guide roller (2 group move frame block)
1.  Install the focus guide roller of which diameter is smaller than the dimension described on the outer tube by 2 size and confirm that 2 

group move frame block moves smoothly (operation feeling) without play.

2nd cam groove

2nd cam groove

Outer Tube

Location of 
description of
the 2nd cam
groove width

Location of description of 
the 2nd cam groove width

Focus Guide Roller, 
Focus Guide Pin

 

In case of  OK :  The selection is finished.

 

In case of  NG :  Proceed to step 2.

2.  Insert the 2 group move frame block in the outer tube and align the focus guide pin installation part (flat part) of 2 group move frame 

block with the 2nd cam groove of outer tube.

3.  Install the focus guide pin to the focus guide roller.
4.  Hold the screw portion of focus guide pin with tweezers and push the screw head side to the focus guide pin installation part (flat part).
5.  When moving the 2 group move frame block from the infinite end to the near end, if the focus guide roller moves smoothly without 

play, it is defined as the  the same focus guide roller as the groove width .

6.  Select the focus guide roller of which diameter is smaller by 2-size than the focus guide roller with the same size as the groove width.

Outer Tube

2nd cam groove

2 Group Move 
Frame Block

2 Group Move 
Frame Block

Focus Guide Roller,
Focus Guide Pin 

Focus Guide Roller,
Focus Guide Pin 

Focus guide pin installation part 
(flat part) of 2 group move frame 
block

Selection of focus guide roller (3rd lens barrel)
1.  Install the focus guide roller of which diameter is smaller by 1-size than the dimension of 3rd cam groove described on the outer tube 

and confirm that the 3rd lens barrel moves smoothly (operation feeling) without play.

Focus Guide 
Roller

Focus Guide 
Roller

Focus Guide 
Pin

Outer Tube

Focus Guide 
Pin

3rd cam groove

Location of description 
of 3rd cam groove 
dimension

 

In case of  OK :  The selection is finished.

 

In case of  NG :  Proceed to step 2.

2.  Re-assemble the 3rd lens barrel at the position where it is rotated 180º with respect to the outer tube in the arrow direction and 

confirm the operation feeling.

Focus Guide 
Roller

Focus Guide 
Roller

Focus Guide 
Pin

Focus Guide 
Pin

Outer Tube

3rd Lens Barrel

 

In case of  OK :  The selection is finished.

 

In case of  NG :  If the operation feeling is better than in step 1, proceed to step 2.

 

In case of  NG :   If the operation feeling is worse than in step 1, turn back the 3rd lens barrel 180º with respect to the outer tube and 

proceed to step 3.

3.  Select the focus guide roller of which diameter is smaller by 2-size than the described dimension.