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Dual 521 Service Manual
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L
L._
•••••
Dual
Edition
August
1978
Service
Manual
521
Dual
Gebrüder
Steidinger
7742
St.Georgen/Schwarzwald
Download from www.dual.de
Not for commerical use
2
Table of Contents
Table of Contents
3
Motor and Drive
4
Speed Selection
4
Turntable
4
Belt
4
To Replace the Motor Pulley
4
Stroboscope
5
Tuning to the Pitch-Of-Tone Level
5
To Replace the Spring Case
6
To Adjust the Tone Arm Bearings
6
Tone Arm with Bearings
6
To Remove the Tone Arm from Its Bearing Frame
6
To Remove Tone Arm Complete with Bearings
6
Anti-Skating Device
6
Tone Arm Lift
7
To Replace the Lift Plate
7
Tone Arm Control
7
The Starting Sequence
8
Manual Start
8
Continuous Play
8
Muting Switch
8
Final Shutting-Off
8
Stop Circuit
9
Adjustments
9
Tone Arm Set-Down Point
9
Set-Down Point for 30-CM Records
9
Set-Down Point for 17-CM Records
9
Shut-Off Point
9
Tone Arm Lift Height
9
Turntable Does Not Start
9
Tone Arm Improperly Lowered
10
Acoustic Feedback
10
Lubrication
14
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Dual 521 Specifications
General
Drive System
Belt drive
Speeds
33 1/3 and 45 RPM
Weight
5.5 kg
Anti-Skate
Yes
Stylus
Elliptical
Output
Depends on cartridge
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