Dual C 839 RC Service Manual page 2

Contents
Page
Technical Data 2
Functional description 3 — 6
Alignment operating 7, 8
Alignment positions
9
Wiring diagram 10 — 16
Printed plate 17 — 22
Mechanic part 23 — 24
Replacement and Exploded view
25 — 29
Technical data (typical values)
The unit exceeds the requirements of DIN 45 500 for domestic
Channel separation at 1000 Hz
HiFi equipment.
between stereo channels
between channels in opposite direction
35 dB
60 dB
Tape speed 4.75 cm/s
Erasure at 1000 Hz 70 dB
Pitch Control range
± 4 %
Oscillator frequency (push/pull oscillator) 105 kHz
Flutter and wow
W.R.M.S. ± 0.03%
Inputs (sensitivity at 0 dB)
to DIN, playback only
±0.06%
Microphone (1/4" coax jack) 0.25 mV/10 kOhm
to DIN, recording/playback ± 0.09%
Receiver/amplifier (DIN jack) 0.5 mV/ 6.3 kOhm
Receiver/amplifier (RCA jacks)
40
mV/82 kOhm
Frequency response (referring to DIN tolerances)
Standard Fe tape 30 — 18 000 Hz
Outputs (adjustable)
Cr02 tape 30 — 19 000 Hz
Receiver/amplifier (DIN jack) 0— 580 mV/10 kOhm
FeCr tape 30 — 19 000 Hz
Receiver/amplifier (RCA jacks) 0 —580 mV/ 2 kOhm
Pure metal tape
30 — 20 000 Hz
Headphones (1/4" coax jack) 4 —2000 Ohm
Signal-to-noise ratio (with Dolby NR)
Fast wind time for C 60 cassette 65 sec.
Fe
64 dB
Line yoltage
115 volt and 230 volt
Cr02
FeCr
64 dB
67 dB
Line frequency 50/60 Hz
Met 67 dB
Power consumption
40W
2