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PD-M423, PD-M403
(Release from test mode]
Here is the procedure for releasing the test mode:
1. Press the STOP key and stop all operations.
2. Unplug the power cord from the AC socket.
[Operations of the keys in test mode]
| Code | KeyName
| Function In Test Mode
Explanation
PGM
Focus servo close
The laser diode is lit up and the focus actuator is lifted
(PROGRAM)
up, then lowered slowly and the focus servo is closed at
the point where the objective lens is focused on the disc.
With the player in this state, if you lightly rotate the
stopped disc by hand, you can hear the sound the focus
servo.
If you can hear this sound, the focus servo is operating
correctly. If you press this key with no disc mounted, the
laser diode lights up, the focus actuator is pulled up, then
the actuator is lowered
and raised three times and
retuned to its original position.
[>] | PLAY/PAUSE | Spindle servo ON
Starts the spindle motor in the clockwise direction and
when the disc rotation reaches the prescribed speed
(about 500 rpm at the inner periphery), sets the spindle
servo in a closed loop.
Be careful.
Pressing this key when there is no disc
mounted makes the spindle motor run at the maximum
speed.
If the focus servo does not go correctly into a closed loop
or the laser light shines on the mirror section at the
outermost periphery of the disc, the same symptom is
occurred.
Tracking servo
Pressing this key when the focus servo and spindle servo
close/open
are operating correctly in closed loops puts the tracking
servo into a closed loop, displays the track number being
played back and the elapsed time on the front panel, and
outputs the playback signal.
If the elapsed time is not displayed or not counted
correctly or the audio is not played back correctly, it may
be that the laser is shining on the section with no sound
recorded at the outer edge of the disc, that something is
out of adjustment, or that there is some other problem.
This key is a toggle key and open/close the tracking
servo alternately. This key has no effect if no disc is
mounted.
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