Dual CS 506 User Manual

Setting stylus pressure
Each cartridge requires a certain stylus pressure with which op-
timum reproduction is obtained. You will find this specification
for the fitted cartridge on the enclosed data sheet.
If the tonearm has been exactly balanced, the stylus pressure
necessary for the cartridge is set by turning the stylus pressure
scale (4). The stylus pressure can be continuously set within
the range from O to 30 mN (0 - 3 g), whereby the digits on
the scale represent the following
10mN A 19
20 mN A 29
30 mN A 3g
A graduation mark in the range from 2 - 15 mN is analogous to
this (0.2 - 1.5 g) 1 mN (0.1 g)
The unit works reliably from a stylus pressure of 5 mN (0.5 g)
onwards.
Anti-skating
The skating force acting upon each tonearm leads to one-sided
wear and tear of the stylus and record and can cause distorted
reproduction.
In order to balance out the skating force, a counterforce exactly
defined with regards to size and direction must be applied. The
anti-skating device (5) of your HiFi record player fulfills this
requirement.
For stylus types usual or standardized nowadays, separate set
ting scales are available in accordance with the printed symbols
O Setting for spherical styli.
O Setting for biradial (elliptical) styli
Adjustment of the anti-skating device should be carried out
synchronously to setting of the stylus pressure: turn the anti-
skating device to the digit of the scale concerned, which cor
responds to the adjusted stylus pressure. For example, in the
case of 15 mN (1.5 g) stylus pressure also place the anti-skating
rotary button in position "1.5"
The skating force is reduced by approximately 30 % in the
case of 25 mN (2.5 g) stylus pressure also place the anti-skating
rotary button in position “2,5”.
Cue Control
Your unit is equipped with a shock-free cue control silicone-
damped in both directions.
Thus the tonearm can be lowered to any desired point on the
record more gently than is possible by hand. The cue-control
lever (6) has two positions:
Y tonearm raised
Y tonearm on record
The cue control holds the tonearm above the record, and it
can therefore be moved to any position over the record with
complete safety. A light touch on the cue-control lever (6) to
the Y position lowers the tonearm gently. The cue-control re-
turns to the X position automatically at the end of the record.
With the cueing control in Y position, the height of the stylus
above the record can be varied by approximately 6 mm by tur-
ning the adjusting screw (1)
Pitch control
Each of the two standard speeds (33 1/3 and 45 rpm) can be
varied with the pitch control. Adjustment is made with pitch
control knob (13) (Fig. 3). Adjustment range at 33 1/3 rpm
approx. 1 semitone (6 %)
The pitch control maintains the nominal speed and provides
for individual control of tempi and pitch of reproduction, for
example, when the pitch of recorded music is to match a live
musical instrument, or when a record passage is to match the
length of a motion picture scene.
The set speed can be checked with the aid of the illuminated
stroboscope on the outside edge of the platter. Despite the ro-
tation of the platter, the stroboscope markings for the desired
speed seem to stand still when the actual speed of the platter
is the same as the set speed
Removing platter
The platter is secured to the chassis by a clip which engages
the platter shaft. To remove the platter, lift the mat over one
of the openings and turn it so the opening is at the left. Then
free the screw seen in the opening and press it outward. The
platter can then be lifted off.
To secure the platter, press the screw inward and tighten again.
Changing drive belt
Lift the platter mat on a recess of a platter and rotate this sec-
tion to the range of the drive pulley of motor.
Remove the belt from the motor pulley and let it remain in
position around the inner rim of the platter. Now release the
platter and remove it (as described below).
Remove the old belt and place the new one on the inner rim of
the platter.
Attention! Be sure the textured (ground) side of the belt is on
the inside, Then replace the platter on the chassis and secure it
before.
Remove the flat belt with a cardboard strip, if necessary, and
put it on the motor drive pulley. Make sure that the flat belt
runs freely within the guide fork
50 or 60 Hz Line Frequency
Conversion to a different power line frequency is accomplished
by exchanging the motor drive pulley.
60 Hz AC current is generally supplied in overseas countries.
Ask your dealer, if necessary,
Service
All the lubrication points have sufficient oil. Thus, your unit
will operate impeccably for many years under normal condi
tions. Never try to lubricate any of the lubrication points your
self. If your record player should ever need servicing, either
take it to your specialist dealer or ask him for the address of
the next authorized Dual Servicing Workshop. Please make
sure that only original Dual replacement parts are used
Should the unit ever be dispatched, make sure that this is
packed perfactly, if possible, by using the original packaging
Electrical safety
The unit complies with the International Safety Regulations
for radio and related devices (IEC 65)
Technical data
Measured values = typical values.
Rumble and wow and flutter values obtained with test record.
Current AC 50 or 60 Hz, changeable by changing motor pulley
Line Voltage 110 — 125 V or 220 — 240 V, changeable
Drive Dual 8-pole synchronous motor: precision flat belt for
flywheel drive
Power consumption approx. 10 watts
Starting Time (to each nominal speed) approx. 2 seconds at
33 1/3 rpm
Power Consumption at 220 V, 50 Hz: approx. 75 mA
at 117 V, 60 Hz: approx. 140 mA
Platter Non-magnetic, detachable, 1.1 kg, 304 mm $
Platter speeds 33 1/3 and 45 rpm
Pitch Control Variation at both platter speeds
Adjustment range at 33 1/3 rpm approx. 1 semitone (6 26)
Speed control (monitoring) with stroboscope for platter speeds
33 1/3 and 45 rpm, adjustable to 50 or 60 Hz.
Sensitivity of the strobe for 0.1 % speed deviation
6 division markings per minute at 50 Hz,
7,2 division markings per minute at 60 Hz.
Total Wow and Flutter
DIN + 0.07 %
WRMS + 0.04 %

Dual CS 506 Specifications

General

Brand	Dual
Model	CS 506
Category	Turntable
Language	English