Pioneer PL-4 Service Manual page 5

3.2 D.D MOTOR ASSEMBLY
After the panel has been removed, loosen the
three motor attachment screws @ and remove
the motor.
3.3 TONEARM SECTION
Remove the tonearm section by taking out the
three arm base attachment screws @ and one
ground wire securing screw@.
3.4 CONTROL MECHANISM SECTION
After the tonearm section has been removed,
loosen the three control mechanism attachment
screws @and remove the assembly.
Tonearm
PU plate
Fig. 3-3 Remove tonearm
3.5 TONEARM
1. Disconnect the tonearm lead wires from the
PU board (See Fig. 3-2).
Note that some of the lead wires have been
soldered to the PU board, and must be discon-
nected with care.
2. Loosen the set screw @ with a screwdriver to
remove the PU plate under the arm base (See
Fig. 3-3).
8. Undo the screw @ securing the tonearm to the
arm base (See Fig. 3-3).
Tonearm
lead wires
PU board Red
Fig. 3-2 Disconnect the tonearm lead wires
(Hexagone socket screw)
Arm base