DN-780R
2
SAFETY PRECAUTIONS
The following check should be performed for the continued protection of the customer and service technician.
LEAKAGE CURRENT CHECK
Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to
chassis resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either
side of the power cord is less than 460 kohms, the unit is defective.
■
Dolby noise reduction and HX Por headroom extension manufactured under license from Dolby Laboratories
Licensing Corporation. HX pro originated by Bang & Olufsen.
■
“DOLBY”, the double-D symbol
and “HX Pro” are trademarks of Dolby Laboratories Licensing Corporation.
SPECIFICATIONS
Type:
Vertical tape loading; 4-track 2-channel stereo double cassette deck
Heads:
Recording/playback head (hard permalloy)
×
2
Erase head (Double-gap ferrite)
×
2
Motors:
Capstan (DC servo motor)
×
2
Reel (DC motor)
×
2
Tape Speed:
4.8 cm/sec.
Variable (PLAY):
Approx. ±12%
Fast Forward, Rewind Time:
Approx. 110 sec. with a C-60 cassette
Recording Bias:
Approx. 105 kHz
Overall S/N Ratio
(at 3% THD level):
Dolby C NR on: more than 74 dB (CCIR/ARM)
Overall Frequency Response:
20~18,000 Hz ±3 dB (at
−
20 dB, Metal tape)
Channel Separation:
More than 40 dB (at 1 kHz)
Wow & Flutter:
0.06% WRMS, ±0.14% w.peak
Input
LINE:
50 mV (input level at maximum)
Input impedance: 240 kohm unbalanced
MIC:
0.775 mV (mic level at maximum)
Output
LINE:
775 mV (0 dB)
(with 47 kohm load, recorded level of 200 nWb/m)
PHONES:
7 mW output level at maximum
(optimum load impdance 8 ohm~1.2 kohm)
Power Supply:
33 W
Dimensions:
438 (W)
×
134 (H)
×
275 (D) mm
Wehght:
6.5 kg (14 lbs 5 oz)
Installation:
19-inch rack mountable (3U)
* For improvement purposes, specifications and functions are subject to change without advanced notice.
