Mechanism Adjustments - Pioneer PL-500X Service Manual

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4 . 2 M E C H A N I S M A D J U S T M E N T S
Prior to commencing any adjustments, check
that the PU plate shaft moves along the center axis
of the slot in the sub-panel as shown in Fie. 4-4.
Fis. 44
o Tonearm lowering position
Tonearm lowering position is adjusted by tum-
ing an adjustment screw located in the hole at the
base of the tonearm (see Fig. 4-5).
Tum the screw clockwise to move the lowering
position inwards.
Tum the screw counterclockwise to move the
lowering position outwards.
This adjustment may be simplified by using a
test record .
F i s . 4 - 6
o Tonearm misoperation
If the tonearm should happen to stop midway
during the lead-in operation, adjust the nut shown
in Fig. 4-7.
This nut should be neither too tight, nor too loo6e.
Fis. 4-7
r Short switch
The short switch gap should be 0.5mm during
record play. This gap may be adjusted by the
screw shown in Fig. 4-8 below.
Screw driver
Adjusting screw
Short switch
Rotatory cam
PU plate screw
r
Lowering position
too far out
dt-
IJ
t-
o
F i s . 4 - 5
r Auto-return position
1. If the tonearm retums too earlv. screw the PU
plate screw outwards (see Fig. 4-6).
2. If the tonearm retums too slow. screw the PU
plate screw inwards.
Lowering position
too tar in
g
i)
Fig. 4-8