Sony MVC-CD300 Service Manual page 73

3. The main shaft retainer of the BU chassis is broken.
When the portion that retains the main guide as shown, is
broken. The main guide becomes loose and shaky that results
in abnormal operation of the OP unit. → Replace the BU
chassis.
Main shaft retainer
Broken here.
Fig. 8-5.
4. Dowel that determines the spindle motor position on the BU
chassis is broken.
When the dowel that determines the spindle motor position on
the BU chassis is broken, the spindle motor can be moved to
the wrong position. → Replace the BU chassis.
* When the BU chassis is replaced, the spindle motor adjustment
is required. When spindle motor is re-adjusted, perform the skew
adjustment at the same time.
Fig. 8-6.
Main shaft
Dowel
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