Pioneer PD-S601 Manual de servicio - Página 18

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PD-S601

@ Test point and adjustment variable resistor positions

MAIN BOARD ASSEMBLY

Test mode

jumper wires

CN351

VR152

all

icis1 VRIS1

RF. BOARD ASSEMBLY

VR103 @

VR102

1C101

Figure 1 Adjustment Locations

@ Notes

1. Use a 10:1 probe for the oscilloscope.

2. All the knob positions (settings) for the oscilloscope in the adjustment procedures are for when a 10:1 probe is

used.

@ Test mode

These models have a test mode so that the adjustments and checks required for service can be carried out easily.

When these models are in test mode, the keys on the front panel work differently from normal. Adjustments and

checks can be carried out by operating these keys with the correct procedure. For these models, all adjustments are

carried out in test mode.

[Setting these models to test mode}

How to set this model into test mode.

1. Unplug the power cord fror: the AC socket.

2. Short the test mode jumper .:ires. (See Figure 1.)

3. Plug the power cord hack into the AC socket.

When the test mode is set correctly, the display is different from what it usually is when the power is turned on. If

the display is still the same as usual, test mode has not been set correctly, so repeat Steps 1 — 3.

[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]

PD-S601

Function In test mode

Explanation

PAUSE

Tracking servo

close/open

The laser diode 'is lit 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 origina! 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.