Pioneer PL-450 Service Manual

Y) PIONEER
Service
PIAZEVUEN
CIRCUIT & MECHANISM
DESCRIPTIONS
REPAIR & ADJUSTMENTS
STEREO TURNTABLE
L-450
PL-405
MODEL
PL-450
COMES
IN
FIVE
VERSIONS
DISTINGUISHED
AS
FOLLOWS:
Voltage Remarks
ORDER NO.
ARP-502-0
The photo shows the model PL-450.
AC 120V only U.S.A. model
AC 120V only Canada model
AC 220-240V European continent model
AC 220-240V United Kingdom model
AC 110-120, 220-240V (switchable) General export model
Voltage
AC 220-240V United Kingdom model
AC 110-120, 220-240V (switchable) General export model
"AC 120V only U.S.A model
AC 120V only Canada model
@ This service manual is applicable to the PL-450/KU type.
@ Both model PL-450 and PL-405 have the same basic mechanism and performance. The only difference is
in appearance.
® For servicing of the PL-450/KC, WEM, WB, R and PL-405/R, WB, KU, KC types, please see 21 ~ 30
page.
® Ce manuel d ‘instruction se rerére au mode de réglage en francais.
®@ Cste manual de servicio trata del método de ajuste escrito en espafiol.
PIONEER ELECTRONIC CORPORATION =~, Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan
PIONEER ELECTRONICS [USA] INC. P.O. Box 1760, Long Beach, California 90801 U.S.A.
TEL: (B00) 421-1404, (213) 420-5974 |
PIONEER ELECTRONIC [EUROPE] N.V. Keetberglaan 1, 2740 Beveren, Belgium TEL: 03/775:28:08
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia
TEL: [(O3] 580-9911
FG © MAR. 1984 Printed in Japan

Pioneer PL-450 Specifications

General

Overhang	15 mm
Speeds	33 1/3, 45 RPM
Platter	Aluminum
Tonearm	S-shaped tonearm
Type	Belt Drive
Cartridge weight range	4 to 6 g

Summary

Specifications

Motor and Turntable

Details about the drive system, motor, platter, speeds, and noise ratio.

Tonearm

Specifications for the tonearm, including type, length, and overhang.

Subfunctions

Lists operational features like auto-return, quick play, and quick stop.

Miscellaneous

Covers power requirements for different model types.

PC-250T Specifications

Technical details of the included PC-250T cartridge and stylus.

Panel Facilities

Disassembly

Mechanism Ass'y and Motor

Step-by-step guide for disassembling the mechanism and motor components.

Tone Arm

Instructions for safely removing the tonearm assembly.

Power Supply Ass'y

Steps for disassembling the power supply unit.

Exploded Views

4.1 Exterior

Visual breakdown of external components with part numbers.

Electrical Parts List

Miscellaneous Parts

List of general parts not categorized elsewhere.

Semiconductors

Identifies semiconductor components with part numbers.

Capacitors

Lists capacitor part numbers and types.

Others

Lists other essential components like transformers and power cords.

P. C. Boards Connection Diagram

Schematic Diagram

Packing

Precautions for Reassembly

9.1 Areas That Require Lubrication

Details specific points requiring lubrication during reassembly.

9.2 Precautions for Attachment of Parts and Reassembly

Guidelines for correctly attaching and reassembling components.

Adjustments

10.1 Auto-Return Adjustment

Procedure for calibrating the automatic return function.

10.2 Arm-Elevation Adjustment

Steps to set the correct stylus height for arm elevation.

10.3 Motor Adjustments

Procedure for adjusting motor speed for accurate playback.

For PL-450/KC, R and WEM Types

11.1 PL-450/KC Type

Details specific differences for the PL-450/KC model.

11.2 PL-450/R, WEM and WB Types

Notes variations for PL-450/R, WEM, and WB models.

For PL-405/R, WB, KU and KC Types

12.1 PL-405/R and WB Types

Highlights differences for PL-405/R and WB models.

12.2 PL-405/KU and KC Types

Details variations for PL-405/KU and KC models.

Safety Information

1. Safety Precautions

Guidelines for safe operation and servicing, including leakage current checks.

2. Product Safety Notice

Information on special safety characteristics of parts and potential hazards.