Troubleshooting; Specifications - Denon DN-780R Operating Instructions Manual

TROUBLESHOOTING

Check the following before you draw the conclusion that your Stereo Cassette Deck is malfunctioning.
1. Are all the connections correct?
2. Are all system components being operated correctly in accordance with the operating instructions?
3. Are the speakers and amplifier/receiver functioning correctly?
If the tape deck still does not function properly, check the symptom against the list below. If the symptom does
not correspond to the check list, please contact your DENON dealer.
Problem
Tape does not run. • Power cord is disconnected.
• Tape is loose.
• Cassette is not loaded properly.
• Defective cassette.
Tape is not recorded when Rec/Rec • No cassette is loaded.
Mute (4) button is pressed. • Erase prevention tabs are broken
off.
Sound is warbled or distorted. • Heads, capstan or pinch roller are
dirty.
• Tape is wound too tight.
• Recording input level is too high.
• Tape is worn out and has "drop-
outs".
Excessive noise. • Tape is worn.
• Heads, capstan or pinch roller are
dirty.
• Heads are magnetized.
• Recording input level is too low.
High frequency range (treble) is • DOLBY NR switch is set
emphasized. improperly.
High frequency range (treble) is • Heads are dirty.
lost. • Tape is worn.
The cassette tape cannot be • If the POWER switch is turned
removed. off either during recording or
playback and the unit is stopped,
there may be cases when the
cassette cannot be removed,
even if the Eject ( 5 ) button is
pressed.
Cause Remedy
• Check power cord.
• Tighten tape with a pencil, etc.
• Load cassette properly.
• Replace cassette.
• Load cassette.
• Cover holes with adhesive tape.
• Clean them.
• Fast forward or rewind to loosen
tape winding.
• Adjust recording input level.
• Replace tape.
• Replace tape.
• Clean them.
• Demagnetize heads.
• Adjust recording input level.
• Set DOLBY NR switch properly.
• Clean them.
• Replace tape.
• Turn the POWER switch ON ( ¢ )
again, and then press the Stop
( 2 ) button.
• Now, press the Eject ( 5 ) button
to remove the cassette tape.

SPECIFICATIONS

Type Vertical tape loading; 4-track 2-channel
stereo double cassette deck
Heads Recording/playback head (hard parmalloy) x 2
Erase head (Double-gap ferrite) x 2
Motors Capstan (DC servo motor) x 2
Real (DC motor) x 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 Sensitive
LINE 50 mV (input level maximum)
Input impedance : 240 kΩ/kohms unbalanced
MIC 0.775mV (mic level maximum)
Output Level
LINE 775 mV (0 dB)
(with 47 kΩ/kohms load, recorded level of 200 pwb/mm)
7 mW output level at maximum (33 Ω/ohms)
PHONES
Power Supply U.S.A.,Canada and Taiwan R.O.C. models : 120 V AC±10%, 60Hz
Europian models : 230 V AC±10%, 50Hz
Power Consumption 33W
Dimensions 483 (W) x 134 (H) x 275 (D) mm
Mass 6.5 kg (14 lbs 5 oz)
Installation 19-inch rack mountable (3U)
For improvement purposes, specifications and design are subject to change without notice.
Dolby noise reduction and HX Pro 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.
ENGLISH
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