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Pioneer PL-L50 Service Manual

Pioneer PL-L50
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
  
STEREO TURNTABLE
PIONE'


-


   











 

 


  
 
s
   

SIG
   
  
      
     
 
   
CONTENTS
ORDER NO.
ARP-685-0
  
     

 

 
   
  
 

   
 

  
 
 
   
  
 
  
    
 
PIONEER ELECTRONIC CORPORATION      
           
    
          
           
  
FZ © NOV. 1984 Printed in Japan
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Pioneer PL-L50 Specifications

General IconGeneral
BrandPioneer
ModelPL-L50
CategoryTurntable
LanguageEnglish

Summary

SAFETY INFORMATION

SAFETY PRECAUTIONS

Measures for user and technician safety.

PRODUCT SAFETY NOTICE

Notice regarding special safety characteristics of parts.

SPECIFICATIONS

Motor and Turntable Specifications

Technical specifications for motor and turntable.

Tonearm Specifications

Technical specifications for the tonearm.

Power and General Specifications

Power requirements, consumption, dimensions, weight, and accessories.

FRONT PANEL FACILITIES

Controls and Indicators

Description of front panel controls and indicators.

Key Components

Identification of major front panel components.

BLOCK DIAGRAM

Phono Motor Circuit Diagram

Block diagram of the phono motor control system.

Power Supply Circuit Diagram

Block diagram of the power supply section.

CIRCUIT DESCRIPTIONS

Address Sensor Circuit

Detects tonearm position and controls carriage movement.

Tracking Sensor Circuit

Detects tracking errors to correct stylus path.

Elevation and Tonearm Circuits

Controls tonearm movement and EV solenoid.

Seize Detector Circuit

Detects record size for automatic playback.

Phono Motor Circuit

Controls motor speed and rotation.

IC (PD6033) Terminal Descriptions

Detailed pin functions for the PD6033 IC.

DISASSEMBLY

Unit Disassembly Procedure

Steps to disassemble the main unit components.

Carriage and Wire Disassembly

Procedures for removing carriage and wire.

Lead Line Disposal

How to route and manage the lead lines.

PARTS LOCATIONS

Notes on Parts

Notes on part identification and safety.

Component Views

Diagrams showing parts locations on front, rear, top, and bottom.

EXPLODED VIEW AND PARTS LIST

Parts List Notes

Notes on part ordering and identification.

PACKING

Packing List

List of items included in the packing material.

P. C. BOARDS CONNECTION DIAGRAM

Carriage Board Connections

Connection diagram for the carriage board.

PU Board Connections

Connection diagram for the PU board.

Ph Tr Board Connections

Connection diagram for the Ph Tr board.

SCHEMATIC DIAGRAM

Carriage & PU Board Schematics

Schematics for carriage and PU boards.

Control & Motor Board Schematics

Schematics for control and motor boards.

Tr Board Schematics

Schematics for Tr boards (A) and (B).

ELECTRICAL PARTS LIST

General Components

List of coils, capacitors, resistors, switches, and miscellaneous parts.

Control Board Unit Parts

Parts list for the Control Board Unit.

Tr Board Units Parts

Parts list for Tr Boards (A) and (B).

Major Assembly Parts

Parts list for SW, Ph Tr, Carriage, Mechanism Base, Motor, and Circuit Boards.

ADJUSTMENTS

Tone Arm Adjustment

Procedure to adjust tonearm alignment and height.

Tracking Sensor Adjustment

Adjusts tracking sensor gain and offset.

Phono-Motor Speed Adjustment

Adjusts the speed of the phono motor.

TROUBLESHOOTING

Main Troubleshooting Chart

Primary flowchart for diagnosing issues.

Initial Reset Failures

Troubleshooting steps for reset failures.

Phono Motor Issues

Diagnosis for motor start/stop and movement problems.

Switch & Tracking Failures

Troubleshooting switches and tonearm tracking.

Elevation & Sound Failures

Diagnosing elevation and sound output issues.

Sensor Checks

Procedures to check address, size, and speed sensors.

SUPPLEMENT FOR KUT, KCT, HEM, HB, S AND S/G TYPES

Miscellaneous Parts Comparison

Comparison of miscellaneous parts for different models.

Component Notes

Notes on ordering resistors and part identification for supplements.

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