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Pioneer PL-4 Service Manual page 7

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=» RETURN IS FAST (RETURN AT 1mm PITCH)
Protrusions on the pinion gear section
(See section 2)
from the (A) section of the protruding section of
the pinion gear, the return function may operate
at a pitch of only 1mm.
In this case, remove the
Fig. 4-2 Elimination of pinion gear protrusions
plastic protrusions completely (Fig. 4-2)
» MOTOR DOES NOT ROTATE
2P and
5P connectors are not attach-
ed.
YES
Connector(s) is not properly installed.
=
MOTOR DOES NOT STOP
The
switch
lever
and
switch
locker
No
The
installation
location
of the PU
are not locking (See section 3)
plate is incorrect.
Section 3
|
PU plate
In order to turn the power OFF, the PU plate
shaft
touches
surface ®
of the
switch
locker
pushing it over so it locks with the switch lever
turning the
microswitch
OFF
(Fig. 4-3).
If
the amount
of push on the switch locker is insuf-
ficient, it can
not
lock
with
the
switch
lever.
With the tonearm locked in the arm rest, as shown
Switch lever
|
in figure 4-4,
attach the PU plate precisely mid-
Mads
rel Peers Gr switch Iocker
way between the first and second points from the
arm base scale mark counting away from you.
Pte:
Arm base
scale mark
Fig. 4-4 Adjustment PU plate

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This manual is also suitable for:

Pl-320