Pioneer PL-7 User 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-7 Specifications

General

Drive method	Direct drive
Motor	Quartz PLL Hall motor
Wow and flutter	0.025% WRMS
Signal to noise ratio	78 dB
Effective length	221mm
Overhang	15.5mm
Speeds	33 1/3 and 45 rpm

Summary

Service Manual

1. SPECIFICATIONS

3. DISASSEMBLY

Panel and Base Removal Steps

Detailed procedure for removing the main panel and base.

Panel and Base Reassembly

Instructions for reassembling the panel and base.

4. TROUBLESHOOTING

Motor Does Not Rotate Troubleshooting

Diagnosing issues when the motor fails to turn.

Does Not Repeat Function Troubleshooting

Diagnosing issues with the repeat function.

Repeat Function and Selector Issues

Troubleshooting repeat function, selector, and reset plate problems.

Auto-Return and Section 5 Troubleshooting

Diagnosing auto-return failures and related sections.

Starting Position and Tracking Issues

Diagnosing problems with starting position and tracking inner record areas.

Fast Return and Section 6 Troubleshooting

Troubleshooting fast return function and related sections.

Tonearm Lowering and Size Selector Faults

Diagnosing tonearm lowering and record size selector malfunctions.

Motor Does Not Rotate (Continued) Troubleshooting

Further diagnostics for the motor not rotating.

Tonearm Return to Rest and Auto Repeat Issues

Diagnosing tonearm returning prematurely and auto operation repeats.

Motor Does Not Stop and Section 7 Troubleshooting

Diagnosing motor stopping issues and related sections.

MOTOR ASSEMBLY Troubleshooting

Motor Does Not Turn Diagnosis

Unsteady Rotation Troubleshooting

Motor Runs Away Troubleshooting

Motor Dead Spot Troubleshooting

5. PRECAUTIONS FOR REASSEMBLY

Areas Requiring Lubrication

Precautions for Attachment of Parts

Assembly Procedures for Key Components

6. ELECTRICAL PARTS LIST

11. ADJUSTMENTS

Auto-Return, Arm-Elevation, and Stylus Landing Adjustments

Motor Rotation Adjustment Procedure

Detailed steps for adjusting the motor speed and rotation.