Pioneer PL-320 Service Manual

Service
PAL ETUIET
REPAIR
&
ADJUSTMENTS
ORDER
NO.
ART-709-0
STEREO TURNTABLE
L.—<}
PL-320
MODEL PL-4 COMES IN SEVEN VERSIONS DISTINGUISHED AS FOLLOWS:
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—1 20V/220V—240V (Switchable) General export model
110V—120V/220V—240V (Switchable) U.S. military model
MODEL PL-320 COMES IN FIVE VERSIONS DISTINGUISHED AS FOLLOWS:
Voltage Remarks
220V — 240V Europe model
220V — 240V United kingdom mode!
220V — 240V Oceania model
110V—120V/220V—240V (Switchable) Generali export mode!
110V—1 20V/220V—240V (Switchable) U.S. military model (Without dust cover)
= This is the service manual for model PL-4/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 frangais.
= Este manual de servicio trata del método de ajuste escrito en espajiol.
PIONEER ELECTRONIC CORPORATION 4-1. Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan
U.S. PIONEER ELECTRONICS CORPORATION &5 Oxford Drive, Moonachie, New Jersey 07074, U.S.A.
PIONEER ELECTRONIC (EUROPE) N.V. Luithagen-Haven 9, 2030 Antwerp, Belgium
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia
FU © APR. 1981 Printed in Japan

Pioneer PL-320 Specifications

General

Speeds	33 1/3, 45 RPM
Motor	DC Servo Motor
Output Voltage	2.5 mV
Platter	Aluminum
Cartridge	Moving Magnet
Type	Belt-drive turntable
Tonearm	S-shaped, Static Balance

Summary

1. Specifications

2. Front Panel Facilities

Operational Controls and Indicators

Details switches, speed adjustment, and indicator windows on the front panel.

3. Disassembly Procedures

Panel and Base Removal

Step-by-step guide for removing the unit's panel and base.

Internal Component Removal

Procedures for removing motor, tonearm, and control mechanism assemblies.

4. Troubleshooting Guide

Auto-Return Malfunctions

Diagnosing and fixing issues with the auto-return mechanism.

Motor Operation Problems

Troubleshooting motor not rotating, stopping, or running away.

Return Mechanism Speed Issues

Addressing problems related to the speed of the return mechanism.

5. Reassembly Precautions

Lubrication Guidelines

Component Attachment Procedures

8. Schematic Diagrams

PL-4/KCT Type Schematic

PL-4/R, R/G & PL-320 Schematics

11. Adjustments

Auto-Return Adjustment

Arm Elevation Adjustment

Motor Speed Adjustment