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Mechanical Operation; Cd Mechanism Normal Operation - Sony DVP-NS300 Training Manual

Circuit descriptions & troubleshooting.
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1. Remove the top cover, unplug black connector CN807 (power ON to micro) and lay the top panel on the side.
Do not shear or disconnect the white ribbon connector (CN814 to CN005).
2. Plug the unit into AC and press the power ON button. The unit will not power ON until the micro receives the
power ON via CN807.
3. On the front panel circuit board as shown in Figure 8-2, jump CN807. The unit should power up and show
the model number in the display followed by "Ready".

CD Mechanism Normal Operation

Loading
The disc entry is detected either by a photodetector or by Switch SW-11 closing. The loading motor starts and
turns rollers to pull the disc in. The remaining switches on top, SW-11 to 18, shown in Figure 8-3 and Table 8-1,
determine the position of the disc and its size to the microprocessor. The disc enters, overshoots the center and
returns to center (loading motor reverses) so SW-14 momentarily opens. Figure 8-4 lists the switch positions
during loading and Disc IN. O = Open, C = Closed, M = Momentarily.
FIGURE 8-2 - COVER OFF / POWER ON
FIGURE 8-3 - CD MECH - TOP VIEW
CN807
plug &
socket
Photodetector
SW-11
35

8. Mechanical Operation

Front

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