DSC-W90 (serv.man2) - Sony Digital Camera Service Manual (repair manual). Page 18

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DSC-W90_L2

4

Apply the lubricant (SRX-4339) to the nuruto gear, and insert it into the ring assembly.
* Rotate the gear in the ring assembly in the arrow direction until the end of the gear is not engaged 

with a concave portion of the ring assembly (because a convex portion of the rear assembly enters 
the convex portion).

5

Install the zoom gear block on the rear assembly.

6

Engaging four bosses, install the rear assembly on the ring assembly.
* The vibration-proof flexible board must be engaged with the hook of the rear assembly.

7

Tighten four screws in the order of A to D.
*

Tightening torque = 0.049 

±

 0.01N 

•

 m (0.5 

±

 0.1kgf 

•

 cm)

8

Check that the projection of the nuruto shaft that protrudes from the rear assembly is within the 
specified value given below.
*

Specified value: 0.005 – 0.395mm

4

Nuruto gear

Ring assembly

Ring assembly

7

Four screws

Hook

6

Vibration-proof 
flexible board

Nuruto shaft

Nuruto shaft

5

Zoom gear block

6

Rear assembly

Convex portion

Gear

Boss

Boss

0.005 – 0.395mm

8

D

A

B

C