Dual 1215S User Manual

Dual
Edition
February 1972
Technical data
Power
supply
Power
supply voltage
Drive
Power
consumption
Current drain
Turntable
platter
Turntable speeds
Pitch control
variation
Speed
accuracy deviation
to DIN 45 500
<0.15% with platter 3.2 lbs.
Rumble
2 35 dB below
signal level in accordance to DIN 45 500
Weighted rumble
55 dB below
Signal level in accordance to DIN 45 500
Tonearm
torsionally rigid, aluminium tubular tonearm
with vertical need le bearings,
horizontal 2-layer precision
ball bearings
Maximum tracking error
0.18
0 / cm
Cartridge holder
removable, suitable for acceptance of
cartridges having 1/2" mounting and
possessing a weight of
1
—9
grams.
Weight
aprox. 9.7
lbs. with platter 3.2 lbs.
Dimensions and mounting
cutouts
see
installation
instructions
Dual
1215S
Service
Manual
alternating, 50 or 60 cycle
changeable by changing motor pulley
110/117
and 220/240 V, svvitchable
4 -pole
asynchronous pole motor with radialelastic
suspension
10 watts
115 ma
approx. at 117 V, 60 cycle
weighing 3.2 lbs., dia 105/8
inch.
33 1/3,45
and 78
r.p.m.
adjustment
range of approx. 1 semitone (6
at all three turntable speeds
Dual
Gebrüder
Steldinger
• 7742 St.
GeorgeniSchwarzwald
1.
Download from www.dual.de
Not for commerical use

Dual 1215S Specifications

General

Drive type	Belt drive
Power consumption	10 W
Speeds	33, 45 rpm
Tonearm	S-shaped tonearm
Cartridge holder	Standard 1/2 inch
Record diameter	12 inch
Platter	Aluminium

Summary

Technical Data

Motor and Drive System

Pitch Control

Tonearm and Bearing Assembly

Tonearm bearing assembly procedure

Step-by-step guide for replacing the tonearm with its bearing assembly.

Anti-skating Adjustment

Anti-skating mechanism description

Details on the precision anti-skating mechanism and its adjustment.

Tonearm Operation Details

Tonearm Movements Control

Explanation of how the tonearm moves and is positioned during operation.

Tonearm Lift (Cue Control)

How to safely lift and lower the tonearm onto the record.

Start Cycle Operation

Start cycle sequence

Step-by-step explanation of how the start switch initiates the turntable cycle.

Control Functions

Manual Start Procedure

How to manually start the turntable by swinging the tonearm inward.

Stop Switching Mechanism

How the operating lever activates the stop function and interacts with the main cam.

Automatic Cycle Operations

Muting Switch Function

Prevents audio noise during change cycles by short-circuiting audio channels.

Record Drop Mechanism

How the automatic spindle and main cam manage record dropping.

Shut-off and Change Cycle

How the shut-off lever and turntable gear control cycle changes and unit shut-off.

Shut-off Mechanism Details

Mechanism operation and adjustment

Explanation of the shut-off mechanism's cam follower lever and its adjustment.

Lubrication Guidelines

Lubrication points and procedure

Guidance on applying lubricant sparingly to bearings and sliding points.