Dual 1224 - Service Manual

ition May 1974
Technical data
Current type
Line voltage
Drive Dual 1224
Drive Dual 1225
Power consumption
Current requirements
Dual 1224
Current requirements
Dual 1225
Platter
Platter speeds
Pitch control
Wow and flutter
Signal-to-noise ratio Dual 1224
Signal-to-noise ratio Dual 1225
Tonearm
Pick-up head
(cartridge holder)
Stylus pressure
Pick-up cartridge
Dimensions
Weight Dual 1224
Weight Dual 1225
Dual 1224
Dual 1225
Service Manual
AC 50 or 60 cycle, with appropriate motor pulleys
110/130 V and 220/240 V selector
Two-pole Dual single-phase asynchronous motor
Four-pole asynchronous motor
< 10 Watt
approx. 60 mA at 220 V 50Ocycle,
approx. 115 mA at 110 V 60 cycle
approx. 64 mA at 220 V 50 cycle,
approx. 115 mA at 110 V 60 cycle
1.45 kg, 270 mm @
33 1/3 and 45 rom, automatic tonearm setdown coupled to speed selector
Adjustment of approx. 1 semi-tone (6 %) at both platter speeds
<+ 0.15 % rated in accordance with DIN 45 507
Rumble signal-to-noise ratio > 55 dB
Rumble unweighted signal-to-noise ratio > 35dB in-accordance with DIN 45'500
Rumble signal-to-noise ratio > 56dB
Rumble unweighted signal-to-noise ratio > 37 dB in accordance with DIN 45 500
Torsionally-rigid tubular aluminium arm with vertical pivot mounting, horizontal self-adjusting
pivot mounting
Removable, suitable for acceptance of all (Dual 1224 all piezo electric) cartridges having 1/2”’
mounting and a deadweight of 2 — 10 grams (including mounting fixtures)
Continuously-adjustable from O — 8 p, reliable as from 1 p stylus pressure
See separate data sheet
329 x 274 mm (+ 2 mm tonearm overhang)
3.9 kg
4kg
Dual Gebriider Steidinger - 7742 St. Georgen!/Schwarzwald

Summary

Technical Specifications Dual 1225

Pickup Connection Diagram

Motor and Drive System

Pitch Speed Adjustment

Tonearm and Suspension

Replacing Tonearm Assembly

Procedure for replacing the complete tonearm and bearing assembly.

Tonearm Replacement

Steps for removing the tonearm from its bearing frame.

Anti-Skating Mechanism

Tonearm Guide Mechanism

Tonearm Lift (Cue Control)

Start Cycle Operation

Manual Start Procedure

Stop Switching Function

Muting Switch Function

Record Drop Mechanism

Shut-off and Change Cycle

Shut-off Mechanism Details

Replacement Parts List

Lubrication Guide

Dual 1224 Specifications

General

Brand	Dual
Model	1224
Category	Turntable
Language	English