Pioneer PL-720 Service Manual

Service
PMALEVINIED
REPAIR
&
ADJUSTMENTS
ORDER
NO.
ART-701-0
STEREO TURNTABLE
L=— 7
PL-720
MODEL PL-7 COMES IN SEVEN VERSIONS DISTINGUISHED AS FOLLOWS:
Voltage Remarks
120V only U.S.A. model (Without cartridge)
120V only Canada model (Without cartridge)
220V — 240V Europe model
220V — 240V United Kingdom model
220V — 240V Oceania model
110V—120V/220V—240V (Switchable) General export model
110V-120V/220V—240V (Switchable) U.S. military model
MODEL
PL-720(which
is
minor
change
in
design
from
PL-7)
COME
IN
FIVE
VERSIONS
DISTINGUISHED
AS FOLLOWS:
Voltage Remarks
220V — 240V Europe model
220V — 240V United kingdom model
220V — 240V Oceania model (Without dust cover)
110V—1 20V/220V—240V (Switchable) General export model (Without dust cover)
110V—1 20V/220V—240V (Switchable) U.S. military model (Without dust cover)
a This is the service manual for model PL-7/KUT. For servicing of the other types,
please refer to the additional service manual.
= Ce manuel d’instruction se refére au mode de réglage, en francais.
= Este manual de servicio trata del método de ajuste escrito en espafiol.
PIONEER ELECTRONIC CORPORATION
FU ©APR. 1981 Printed in Japan

Pioneer PL-720 Specifications

General

Brand	Pioneer
Model	PL-720
Category	Turntable
Language	English

Summary

Front Panel Facilities

START/STOP Switch

Tonearm

Disassembly

Panel and Base

D.D Motor Assembly

Tonearm Section

Control Mechanism Section

Tonearm

Panel and Base Reassembly

Troubleshooting

Motor Does not Turn

Diagnosing and fixing issues where the motor fails to rotate.

Does Not Repeat

Troubleshooting the repeat playback function.

Repeat Function Issues

Auto-Return Not Working

Resolving problems with the automatic return feature.

Fast Tonearm Return

Troubleshooting a tonearm return that occurs too quickly.

Tonearm Descent Position Error

Fixing incorrect tonearm descent positioning.

Record Size Selector Malfunction

Diagnosing faults with the record size selector.

Motor Assembly Problems

Common issues like unsteady rotation and blinking indicators.

Motor Runs Away

Troubleshooting excessive motor speed or runaway operation.

Motor Dead Spot

Addressing issues causing motor dead spots.

Reassembly Precautions

Areas Requiring Lubrication

Precautions for Part Attachment

Block Diagram

Schematic Diagram

Adjustments

Auto-Return Adjustment

Procedure to adjust the automatic tonearm return.

Arm-Elevation Adjustment

Stylus Landing Position Adjustment

Setting the tonearm's descent point on the record.

Motor Rotation Adjustment

Calibrating the turntable's playback speeds.