Pioneer PD-41 Manual de serviço - Página 30

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PD-41,PD-9700

@ Symptom when out|

Sound broken; some discs can be played but not others.

of adjustment

@ Measurement instru-| Connect the oscilloscope to TP 1, Pin|

@ Player state

Test mode, play

mentconnections

1 (RF).

[Settings]

20 mV /division

@ Adjustment location | Pickup

radial

tilt adjustment

screw

200 ns/division

and tangential tilt adjustment screw

AC mode

YEDS-7

(Procedure|

spindle servo and put the player into play mode.

3. Next, adjust the tangential tilt adjustment screw with a Phillips screwdriver so that the eye pattern (the diamond

shape at the center of the RF signal) can be seen the most clearly (Figure §).

4. Adjust the radial tilt adjustment screw and the tangential tilt adjustment screw again so that the eye pattern can be

seen the most clearly. As necessary, adjust the two screws alternately so that the eye pattern can be seen the most

clearly.

Note: Radial and tangential mean the directions relative to the disc shown in Figure 4.

Radial

direction

Phillips

screwdriver

Radial direction

Tangential direction

Phillips

me 20)

screwdriver

wh>

Tangential

Figure 4

direction

Adjustment locations