Dual 502 - Table of Contents; Specification

Contents
Page
Pick -up
Connection Diagram
2
Specification
3
Motor
and Drive
4
Replacement of
motor pulley
4
Setting
nominal speed
4
Tonearm and Tonearm
Suspension
5
Removal of
tonearm
from bearing
frame
5
Removal of
tonearm
assembly with
tonearm
bearing 5
Replacement of
spring housing
5
Adjusting the
tonearm
bearing
6
Anti-Skating
device
6
Cue
Control
6
Replacement of cue control
assembly
7
Starting and
Shut-off
7
Tonearm not
parallel to
platter
8
Platter does
not start
after connecting
the
unit to power line and moving the
tonearm inwards
8
Platter
does not reach
nominal speed
8
Stylus slips out
of playing
groove
8
Tonearm does
not
lower or
lowers onto
record too quickly when cue control is operated 8
Acoustic
feedback
8
Exploded views
10, 11
Spare
parts
9, 11, 13
Lubrication
14
Specification
Current type
AC 50 or 60 Hz, selected by
exchanging drive pulley
Line
voltages
110 — 130
volts and 220 — 240
volts
Motor and
Drive
Dual 8 -pole
synchronous motor with flat belt drive system
Power Consumption < 10
watts
Current Consumption
with 220V 50 Hz, about 75 mA, with
110V
60 Hz about 140 mA
Platter
Non-magnetic, 1.3 kg,
300 mm dia.
Platter
speeds 33 1/3
and 45 rpm
Overall speed variation
<-±
0.09 %
(assessed in
accordance with DIN
455071
Signal-to-noise ratio
Rumble weighted signal-to-noise ratio
>
62 dB
acc. to DIN 45
500
Rumble unweighted signal-to-noise ratio > 41 dB
Tonearm
Torsion-resistant
aluminum tonearm in
four-point gimbal suspension
Tonearm Bearing
Friction
vertical
<
0.007 p
horizontal < 0.016 p
Pick
-up Head
Detachable, suitable for all pick -up
cartridges with Dual catch mounting and 1/2"
mounting
and a
deadweight
of 4.5 — 10 g
(including
hardvvare)
Tracking Force
0 — 3 p continuously variable, with 1/10 p calibration in the range from
0—
1.5 p,
reliable as from 0.5 p
tracking force
Weight
approx. 4.2 kg
For
dimensions and cutout refer to
Installation I nstructions.
3