Denon DN-720R operating instructions Troubleshooting, Specifications

TROUBLESHOOTING

Make sure of the followings before you consider as any malfunctions:

1.Are all the connections correct?

2.Is the set being operated correctly in accordance with the operating instructions?

3.Are the speakers and amplifiers functioning correctly? If the tape deck still does not function properly, check it again, using the check list below. If the symptom does not correspond to the check list, please contact your DENON dealer.

Problem	Cause	Remedy
Tape does not run.	• Power cord is off.	• Check power cord.
	• Tape is completely wound up.	• Rewind tape.
	• Tape is loose.	• Tighten tape with a pencil, etc.
	• Cassette is not loaded properly.	• Load cassette properly.
	• Defective cassette.	• Replace cassette.
Tape is not recorded when recording button is	• No cassette is loaded.	• Load cassette.
pressed.	• Erase prevention tab is broken off.	• Cover hole with plastic tape.
Sound is warbled or distorted.	• Heads, capstan or pinchroller are contaminated	• Clean them.
	• Tape is wound too tight.	• Fast forward or rewind to loosen tape
		winding.
	• Recording input level is too high.	• Adjust recording input level.
	• Tape is worn out and has "drop-outs".	• Replace tape.
Excessive noise.	• Tape is worn.	• Replace tape.
	• Heads, capstan or pinchroller are contaminated	• Clean them.
	• Heads are magnetized.	• Demagnetize heads.
	• Recording input level is too low.	• Adjust recording input level.
High frequency (treble) is emphasized.	• Dolby NR button is set improperly.	• Set Dolby NR button properly.
High frequency (treble) is lost.	• Heads are contaminated.	• Clean them.
	• Tape is worn.	• Replace tape.
When a Cr02 or metal tape is placed in the deck,	• The cassette housing is of an older design	• Use the latest cassette with tape type detection
a different tape indicator comes on.	without tape type detection holes.	holes.
The cassette tape cannot be removed.	• If the power switch is turned off in either the	• Turn the power switch ON again, and then
	recording or playback mode, and the unit is	press the stop button.
	stopped, there may be case when the	• Then, in the stop mode, press the EJECT
	cassette cannot be removed, even if the	button to remove the cassette tape.
	EJECT button is pressed.

SPECIFICATIONS

Type	Vertical tape loading; 4-track 2-channel
	stereo cassette deck
Heads	Recording/ playback head (Amorphous) x 1
	Erase head (Double-gap ferrite) x 1
Motors	Capstan (DC servo motor) x 1
	Reel (DC motor) x 1
Tape Speed	4.8 cm/sec. (FIX)
Variable (PLAY)	Approx. ±72%
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/ARM1
Overall Frequency
Response	25 - 19,000 Hz ±3 dB (at-20 dB, Metal tape)
Channel Separation	More than 40 d8 (at 1 kHz)
Crosstalk	More than 65 dB (at 1 kHz)
Wow & Flutter	0.055% WRMS (JIS method), ±0.14°/ w. peak
Inputs
Line	80 mV (-20 dBm) input level at maximum
	Input impedance: 50 kohm unbalanced

Outputs
Line	775 mV (0 dB) output level at maximum
(with 47 kohm load, recorded level of
200 pwb/mm)
Headphone	1.2 mW output level at maximum
(optimum load impedance
8 ohm -V1.2 kohm)
Power supply	Voltage is shown on rating label
Power Consumption	16 W
Dimensions	(4831W) x 1341H) x 2751D) mm
Weight	4.7 kg
Installation	19-inch rack mountable (3U)

•Above specifications and design styling are subject to change for improvement.

•Dolby noise reduction and HX Pro headroom extension manufactured under license from Dolby Laboratories Licensing Corporation. HX Pro originated by Bang & Aloofness.

"DOLBY", the double-D symbol mand "HX PRO" are trademarks of Dolby Laboratories Licensing Corporation.

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