Dual 622 Service Manual

Service Manual
Technical Data
Currant
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 45507)
Rumble
(according to DIN 45500)
Tonearm
Effective length of tonearm
Offset angle
Tangential tracking error
Tonearm bearing friction
(related to stylus tip)
Stylus pressure
Cartridges
Weight
Dual
622
Edition January 1980
AC 50 to 60 Hz
110 to 125V, 220t0 240V
electronically-controlled direct-drive system, Dual EDS 500
Motor at playing operation approximately 2 watts <50 mW
220 V 50 Hz: at start 35 mA
110 V60 Hz: at Start 65 mA
at play 15 mA at play approximately 25 mA
2- 2.5s at 33 1/3 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, with calibration scale;
range of regulation: 10%
with illuminated stroboscope for platter speeds 33 1/3 and 45 rpm, adjustable to 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
Weighted: 75 dB
Torsionally rigid tubular aluminum tonearm in low-friction four-point gimbal suspension
221 mm
240 4'
0.160 /cm
vertical < 0.07 mN (0.007 g)
horizontal < 0.15 mN (0.0159)
from 0 to 30 mN (0 to 3 g) infinitely variable with 1 mN- (1/109) calibrations from 0 to 15 mN
(0 to 1.59) operable from 2.5 mN (0.259) stylus pressure up.
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. 5.4 kg Dimensions and Cutout Required refer to Installation I nstructions,.