Sony MVC-CD300 Service Manual page 72

8. The Areas That Tend To Break Down
When Dropped To Ground
[Symptom]
The typical failure pattern when the machine is dropped to ground
is shown. Refer to the failure pattern when the dropped machine is
brought to service station for repair.
[Typical Failure Pattern]
1. "Settling" of the OP lead stopper
"Settling"
Fig. 8-1.
Fig. 8-2.
* When the machine in which the above trouble occurs, is operated,
the tooth of the OP lead stopper gear rides over and goes across
the screw peaks of the lead screw that generates the crunching
sound.
[Repair method]
Replace the OP lead stopper.
Amount of play
OK
Fig. 8-3.
When the OP lead stopper is going to be attached, adjust the position
of the OP lead stopper as the figure, and tighten the screw.
Amount of play
Position setting
— 27 —
2. Damper guide is broken.
A
Cabinet
Fig. 8-4.
Three damper guides are used. The trouble is reported that one or
two damper guides are broken.
When the damper guide A or B or C is broken. → Replace the BU
chassis.
C
B
BU chassis