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Dual 502 Service Manual

Dual 502
14 pages
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Dual
October
1976
Edition
502
Service
-
Manual
Dual
Gebrüder
Steldinger
7742
St.
GeorgenISchwarzwald
Download from www.dual.de
Not for commerical use
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Dual 502 Specifications

General IconGeneral
Drive SystemBelt Drive
Speeds33 1/3, 45 RPM
PlatterNon-magnetic, dynamically balanced
Platter weight1.0 kg
Platter diameter300 mm
CueingYes
Tonearm TypeStatic Balanced S-Shaped Tonearm

Summary

Motor and Drive System

Motor Pulley Replacement

Instructions for replacing the motor pulley on the turntable.

Nominal Speed Adjustment

Procedure for setting and adjusting the correct turntable speed.

Tonearm Assembly Procedures

Tonearm Removal from Frame

Steps to remove the tonearm from its bearing frame.

Tonearm Assembly Removal

Detailed steps for removing the entire tonearm assembly.

Spring Housing Replacement

Instructions for replacing the tonearm spring housing.

Tonearm Adjustment and Operation

Bearing Play Adjustment

Adjusting horizontal and vertical tonearm bearing play.

Anti-Skating Force Setting

Setting the anti-skating force using the pointer disk.

Cue Control Functionality

Explains operation and stylus height adjustment of the cue control.

Cue Control Assembly Replacement

Detailed Replacement Steps

Step-by-step instructions for replacing the cue control assembly.

Starting and Shut-off Mechanism

Automatic Shut-off Operation

How the tonearm shut-off is triggered by the platter dog.

Adjustment Points

Adjustments for segment and shut-off point timing.

Troubleshooting Common Issues

Platter and Speed Malfunctions

Addresses platter not running or reaching speed issues.

Tonearm and Stylus Problems

Solutions for pick-up head alignment, stylus slip, and lowering.

Acoustic Feedback

How to resolve issues causing acoustic feedback.

Replacement Parts Listing

Exploded View of Parts

Exploded View Below Chassis

Detailed Parts Identification

Component Breakdown and Quantities

Lubrication Recommendations

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