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Disc Loading, Stacker And Disc Clamping Motor Drive Access - Sony DVP-NS300 Training Manual

Circuit descriptions & troubleshooting.
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Stacker Disc Storage
If another disc is selected for PB, the mechanism will release the clamped disc and store it into the rear stacker
compartment before extracting the second disc. The clamping motor reverses to release the disc into the rollers
and engage the rear stacker rollers. Meanwhile the stacker motor positions the rear stacker tray height. When
rotary encoder 1 senses the correct stacker storage tray position, the loading motor rolls the disc into the stacker
slot. Final disc location switches SW-16 and 17 determine that disc to storage tray is complete and reverses the
loading motor to disengage the disc so the tray can move to the new disc slot.

Disc loading, Stacker and Disc Clamping Motor Drive Access

As shown in Figure 8-5, four screws secure the CD mechanism.
FIGURE 8-5 - DISC MECHANISM REMOVAL - TOP VIEW - 4 SCREWS
Figure 8-6 shows a bottom view of the disc mechanism. Table 8-2 lists the drive functions of the motor's gears
pictured in Figure 8-6.
Drive
Stacker Motor
Disc Loading /
Unloading
Disc Clamping
Figure 12-5 CD Mechanism Removal – 4 screws
1
2
2
Table 8-2 - Drive Functions
Gear Alignment
Stacker height
encoder
None
Disc entry lockout
Clamping Encoder
Stacker Disc
Loading (1 & 2)
3
3
4
4
Functions
Motor moves stacker up
/down.
Moves disc horizontally
[Into Clamper (PB) or
Stacker (storage)].
1. Prevents disc entry
during PB.
2. Clamps disc
3.
Positions rear rollers
for stacker entry.
37
8. Mechanical Operation
Motor Stop Sensor
Rotary encoder 1
(see Fig 13-8 )
7 disc sensors (Sw
11-18. See Figure
13-3 & Table 13-1)
Rotary encoder 2
(see Fig 13-6 )

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