Pioneer PD-J500T Service Manual page 20

[Release from test mode]
Here is the procedure for releasing the test mode:
1. Press the STOP key to stop all operations.
2. Tum off the power switch on the front panel.
[Operations of the keys in test mode]
Code Key name Function in test mode
PROGRAM Focus servo close
PLAY/PAUSE Spindle servo ON
PLAY/PAUSE Spindle servo ON
Tracking servo
close/open
MANUAL /
<< TRACK
SEARCH REV
Carriage reverse
(inwards)
MANUAL /
PP TRACK
SEARCH FWD
Carriage forward
(outwards)
OPEN/CLOSE Disc tray open/close
DISC 1
_ PD-J500T.
Explanation
If Disc Tray 1 is closed, Disk Tray 1 is moved to the play position. Then the laser
diode is \it up and the focus actuator is lowered, then raised 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
down, then the actuator is raised and lowered twice and returned to its original
position.
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.
Pressing this key when the focus servo and spindle servo 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.
Moves the pickup position toward the inner periphery of the disc.
When this key is pressed with the tracking servo in a closed loop, the tracking
servo automatically goes into an open loop. Since the pickup does not
automatically stop at the mechanical end point in test mode, be careful with this
operation.
Moves the pickup position toward the outer periphery of the disc.
When this key is pressed with the tracking servo in a closed loop, the tracking
servo automatically goes into an open loop. Since the pickup does not
automatically stop at the mechanical end point in test mode, be careful with this
operation.
Switches off all the servos and initializes.
The pickup remains where it was when this key was pressed.
Opens/closes the disc tray.
This key is a toggle key and open/close tray alternately.
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