Dual CS 731 Q Service Manual

Contents
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Ф
Technical data
Current type
Line voltages
Drive
Power consumption
Run-up time
Platter
Platter speeds
Pitch control
Speed check
Sensitivity of light stroboscope
for 0.3 % speed deviation
Wow and flutter
Signal-to-noise ratio
Tonearm
Effective tonearm length
Offset angle
Tangential track error angle
Tonearm bearing friction
(related to stylus point)
Tracking force
Pick-up head
Cartridge
Weight
Tonearm connection diagram
Technical data
Block diagram
Direct drive system EDS 920
Wiring diagram
General
Fascia
Motor and drive
Replacing motor electronic system
Replacing motor mechanical system
Pitch control
Stroboscope
Tonearm and tonearm suspension
Fitting a 1/2“ cartridge
Removal of tonearm from bearing frame
Removal of complete tonearm
Replacement of spring housing
Adjustment of tonearm suspension
Anti-skating control
Tonearm cue control
Adjustment point
Replacement of cue control plate
Tonearm control
Continuous play
Starting
Manual start
Muting
Shut-off
End of play shut-off
Adjustment points
Power fuse
Tonearm set down point
Shut-off point
Tonearm lift off height
Pull magnet “start/stop”
Pull magnet “сиеїпд”
Tonearm does not set down
Vertical tonearm movement is inhibited
Platter does not rotate
Tonearm does not set down on edge
Motor does not shut-off
Spare parts list with exploded views
Lubrication instructions
AC 50 or 60 Hz
110 — 125 V and 220 — 240 V
Quartz stabilized electronic direct drive system Dual EDS 920, PLL control
Approx. 4 УУ, motor during play < 50 mW
{until
nominal
speed
is
reached)
approx.
1.8
sat
33
rpm
Non-magnetic dynamically balanced, complete rotary mass detachable approx. 1.5 kg
33 and 45 rpm, electronically switchable, quartz stabilized
In PLL technology, quartz accurate for both speeds, separately adjustable,
range of adjustment + 5.5 96
Quartz accurate, illuminated stroboscope with automatic frequency switch-over
for 33 and 45 rpm
20 graduations per minute
DIN < t0.025 96
WRMS < +0.015%
Rumble unweighted signal-to-noise ratio > 52 dB
Rumble weighted signal-to-noise ratio > 7598
Torsion-resistant “ultra-low-mass” aluminum tonearm, in gimbal 4-point
suspension, tonearm balance weight with tuning anti-resonator
221mm
2604!
0.169 /ст
Vertical < 0.07 mN (0.007 g)
Horizontal <0.15mN (0.015 g)
From 0 — 20 mN (0 - 2 g) infinitely variable with 1 mN (0.1 а)
Calibration in range from 2 — 15 mN (0.2 - 1.5 g)
Detachable, suitable for ultra-low-mass cartridges, with long carrier plate (accessory),
also suitable for cartridges with Dual shap-in mounting and for cartridges with 1/2"
mounting
and
a
weight
of
2
to
9
g
(including
mounting
hardware)
Adjustable overhang: 5 mm
See separate data sheet
Approx. 8 kg

Dual CS 731 Q Specifications

General

Brand	Dual
Model	CS 731 Q
Category	Turntable
Language	English