DVP-CX850D (serv.man3) - Sony DVD Service Manual (repair manual). Page 6

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Disc

Holder (disc A)

Note: The disc must not be 
          fixed and stationary.

Flat head (–) screwdriver

Disc pully

Disc hole

A

B

Fixing screw

Pully assembly

3

 Remove the pully assembly.

•  Loose the fixing screw at 60!! to 90!! and move the attachment plate 
   (BU adjustment) up and down using the flat head (–) screwdriver so 
   that the relationship of the position between the disc hole and disc pully 
   is 3:2 to 2:3.

•  After adjusting as shown below, rotate the cam 
   counterclockwise once and rotate the cam clockwise 
   to confirm that A:B is 3:2 to 2:3.

Cam

1

 Rotate the cam until the cam 

     comes to the position as 
     shown in the illustration so 
     that the cam is aligned.

Cam

2

 Confirm the position as shown 

     in the illustration is established.

0.5–2mm

Base unit

Base unit

Attachment plate 
(BU adjustment)

Magnet assembly

Attachment plate
(BU adjustment)