Pioneer PL-Z93 Service Manual page 19

10. ADJUSTMENTS
10.1 MOTOR ADJUSTMENTS
Place the record player on blocks as shown in
Fig. 10-1 and adjust the motor from the under
base.
1.
2.
Turn the arm elevation lever up to raise the arm.
Place a strobo sheet on the turntable, move the
arm to the turntable side, and rotate the turn-
table.
. Adjust semifixed resistors VR1 and VR2 of the
motor assembly so the 33-1/3 rpm and 45 rpm
strobo of the strobo sheet appears to the static.
. First adjust VR1 for 45 rpm and then the adjust
VR2 for 33-1/3 rpm.
10.2 STYLUS LANDING POSITION
ADJUSTMENT (PL-Z91 only)
When the tonearm doesn't land in the correct
position during automatic playback, adjust accord-
ing to the following procedure.
1.
2.
Place a 30cm record on the platter.
Press the START/STOP switch and start auto-
matic playback. Note the landing position of the
stylus. (How many mm to the inside or outside
compared to the proper landing position on the
platter.)
. Depress the START/STOP switch to return the
tonearm to the tonearm rest.
. Press the arm elevation switch to raise the stylus.
. With the adjustment hole visible, move the tone-
arm to the edge of the record by hand.
. Turn the adjustment screw with a small screw-
driver according to step 2 as follows:
@ When the stylus lands at the outside of the
record, turn the adjustment screw clockwise.
@ When the stylus lands on the proper position
toward the record center, turn the adjustment
screw counterclockwise. One half turn of the
adjustment screws moves the tonearm about
12mm.
. After adjustment, press the START/STOP
switch and check if the stylus landing point was
correctly adjusted.
If adjustment is incorrect, repeat steps 3 to 6.
Be careful not to damage the record and stylus
when making this adjustment.
ADJUSTMENT USING A TEST RECORD
(Landing position adjustment cannot be done
when the tonearm is on the record.)
33-1/3 rpm
Fig. 10-1 Motor adjustment
Small
Phillips screwdriver —_¢
Tonearm lands
Tonearm lands toward
L
Howard outside of
inside of record record
Crefr cre tr
Zee © |
—
. Ss Adjustment hole
Fig. 10-2 Stylus landing point adjustment