Dual CS 626 Service Manual

Service
Manual
Technical Data
Measured values
Current
Line voltage
Drive
Power input
Power
consumption
Time from start to rated speed
Platter
Platter
speed
Pitch control
Speed control
(monitoring)
Sensitivity of the illuminated strobe
(for 0.1 % speed deviation)
Total wow and flutter
(according to DIN 45
507)
Rumble
(according to DIN 45 500)
Tonearm
Effective
length of tonearm
Offset
angle
Tangential tracking error
Tonearm
bearing friction
Irelated
to stylus
tip)
Stylus
pressure
Cartridges
Weight
Dual
CS
626
Edition
February 1980
typical values, Rumble and wow and flutter values obtained with test record.
AC 50 to
60
Hz.
110 to 125
V, 220 to 240V
electronically-controlled direct-drive system, Dual EDS 500
Motor at playing operation, approximately 2 watts < 50 mW
220V 50 Hz: at start 35 mA at play
15
mA
110 V . 60 Hz: at start 65 mA at play approximately 25 mA
2— 2.5
s at
331/3
rpm
non-magnetic, 1.4 kg, 304 mm diameter
33 1/3 and 45 rpm, electronically adjustable
Separate for both speeds, each adjustable by means of variable resistor,
range of regulation: 10 %
with illuminated
stroboscope for platter speeds 33 1/3 and 45 rpm, 50 or 60 Hz.
6 division markings per minute at 50 Hz,
7.2 division markings per minute at 60 Hz.
(German Industry
Standard)
±
0.05%
WRMS
±
0.03
%
Unweighted: 50 dB
Weignted:
75
dB
Torsionally rigid tubular
aluminum tonearm in low-friction four-point gimbal suspension.
221
mm
24 0 4'
0.16
0 /cm
vertical
0.07 mN
(0.007
g)
horizontal 0.15 mN
(0.015
g)
from 0 to 30 mN (0
to 3g) infinitely variable with 1 mN- (1/109)
calibrations
from 0 to 15 mN (0 to 1.5 g) operable from 2.5 mN (0.25
g) stylus pressure upwards.
with 1/2 inch screw-type attachment. These can be fitted
with the special accessories
no. 262 186
which can be
obteined from trade
dealers.
ca. 7.2 kg
Download from www.dual.de
Not for commerical use

Dual CS 626 Specifications

General

Drive	Direct drive
Speeds	33 1/3 and 45 RPM
Output voltage	4 mV
Frequency response	20 Hz - 20 kHz
Weight	7.5 kg
Tonearm	Ultra Low Mass (ULM) tonearm
Platter	1.4 kg, non-magnetic

Summary

Technical Data

Measured Values

Lists current, line voltage, drive, power input, and power consumption.

Speeds and Control

Details platter speed, pitch control, speed monitoring, and strobe sensitivity.

Wow and Flutter / Rumble

Specifies total wow/flutter and rumble according to DIN standards.

Tonearm Specifications

Covers effective length, offset angle, tracking error, bearing friction, and stylus pressure.

Cartridges and Weight

Mentions cartridge compatibility and overall unit weight.

Wiring Diagram

Motorelectronic Circuit

Details the electronic circuit for motor control and speed regulation.

Stroboscope Circuit

Explains the circuit responsible for the strobe light and speed indication.

Component Descriptions

Transistors and ICs

Lists and describes various transistors and integrated circuits used.

Solenoid and Front Controls

Describes solenoid connection plate and front panel controls.

Electronic Circuit Board Layouts

Motorelectronic Layout

Shows the component layout of the motor electronics board.

Electronicplate Layout

Shows the component layout of the main electronic board.

Solenoid and Silent Circuit Layouts

Shows component layouts for solenoid and silent circuits.

Dual EDS 500 System Operations

Motor Replacement and Speed Setting

Guides for motor replacement and adjusting nominal speeds.

Stroboscope and Pitch Control

Explains stroboscope use for speed checking and pitch control.

Tonearm Mechanics and Adjustment

Tonearm Removal Procedures

Details methods for removing the tonearm and its components.

Tonearm Bearing Adjustment

Instructions for properly adjusting the tonearm bearings.

Cartridge, Anti-Skating, and Cue Control

Cartridge Fitting and Anti-Skating

Guide for cartridge installation and anti-skating adjustment.

Cue Control and Muting Switch

Describes cue control operation and muting switch adjustment.

Tonearm Automatic Functions

Tonearm Control Elements

Details control cams and levers for automatic tonearm movement.

Start, Manual Start, and Continuous Play

Explains automatic/manual start, and continuous play modes.

Stopping and Shut-off Mechanisms

Describes stopping and automatic shut-off functions.

Tonearm Placement and Power Switch Adjustments

Tonearm Set-down and Lifting Height

Adjusting tonearm set-down point and lifting height.

Power Switch Play Adjustment

Guide for setting the correct play for the power switch slide.

Specific Magnet Stroke Adjustments

Pull Magnet "Start/Stop" Adjustment

How to adjust the stroke of pull magnets for start/stop operations.

Pull Magnet "Lift" Adjustment

How to adjust the stroke of pull magnets for lifting the tonearm.

Replacement Parts

Parts List and Identification

Lists part numbers, quantities, and descriptions for replacement parts.

Circuit Board Component Details

Electronic, Motor, and Silent Circuit Components

Lists components for various circuit boards.

Exploded View 2

Component Assembly Diagram

Visual representation of component placement for assembly.

Exploded View 1

Main Assembly Diagram

Visual representation of main unit components and their assembly.

Lubricating Instructions

Lubrication Points and Lubricants

Guidance on where and how to lubricate unit parts with recommended lubricants.