Denon D-F10 Manual page 26

The UPA-F10 is equipped with a high speed protector circuit.
This circuit protects interna! parts from being damaged by strong Currents generated in the set should the set be operated
when the speaker terminals are incompletely connected or short-circuited.
{f this protector circuit is activated, a relay sound is produced, the output to the speakers is interrupted, and the function and
power LEDs flash to indicate that there is a problem. {f this should happen, unpiug the power cord, check the speaker
connections, then piug in the power cord and turn the power back on. After several seconds, a relay sound is heard and the
set starts operating properly.
8c
Check the following once more before assuming there is a problem with the system.
1. Are connections proper?
2.1s the system being operated as explained in the operating instructions?
If the system Goes not seem to be operating properly, check as shown on the table below. f none of these checks apply to the
probiem, the system may be malfunctioning. Disconnect the power cord immediately and contact your store of purchase.
Symptom Cause Countermeasure
Power does not turn on when | @ Power cord is not plugged into a power
Power switch 1s pressed. outlet.
@ The set may not operate properly due to such external influences as lightning or static electricity. If this happens, either turn
off the power with the pre-main amplifier's SYSTEM
POWER switch or unplug the power cord, wait approximately
§
seconds, then plug the power cord back in.
@Piug the power cord securely into an
outiet
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No sound is produced trom the @ VOLUME control ts turned down © Set the contro! to an appropriate position.
speakers. @ Headphones are connected. ®@ Disconnect the headphones.
®@ Speaker cords are not securely connected. @ Connect securely.
General
No treble sound is produced, | @ Speaker polarities (@ and @) are in- | © Connect the speaker cords properly.
or the position of the instru- verted.
ments is unclear.
A source other than the desired | © Function is not property set. @ Set the desired function using the FUNC-
one is heard TION button.
Recording does not start when | @ No cassette tape is loaded @ Load a cassette tape.
REC/REC MUTE button is } @ Accidental erasure protection tabs are | @ Cover the tab holes with cellophane tape.
pressed. broken off.
%_ | Sound is broken or no sound is | @ Heads are dirty. @ Clean the heads
3 Produced during recording and
| @ Cassette tape is defective
@ Replace the cassette tape.
@ | Playback.
3 Humming sound is heard while | @ Noise from a TV
© Move the TV away from the system.
8 playing cassette tapes. @ (Noise may be produced by some types of | @ Turn the TV off.
TVs.)
Wow (shaky sound) is heavy
during recording or playback.
© Capstans or pinch rollers are dirty. ® Clean them.
Hissing sound is heard in FM | @ Antenna direction is poor.
programs. @ Signais from the broadcast station are
weak.
@ Change the direction of the antenna
@ Instatt an outdoor antenna
5 | Hissing sound is heard in AM | @ Noise from a TV or interference from a | @ Turn the TV off.
2 Programs. broadcast station.
fd
e
© Change the direction of the loop antenna.
e ® Install an outdoor antenna
{ Humming sound is heard
in | @ Signals on the power cord are being mod- | @ Insen the power cord in the Opposite direc-
AM programs. ulated by the power source frequency. tron
° @ Install an outdoor antenna.
@ Disc is not of the specified type. @ Replace with a disc of the specified type
Nothing happens when operat- @ Disc is loaded upside-down. @ Reload the disc.
ing buttons are pressed. @ Foreign object on disc tray. @ Remove the disc ang the foreign object.
Disc stops in the middie of a | @ Disc is dirty. @ Clean the disc
CD piayer Sound is broken. © Dirt, fingerprints, spittle. etc. on disc. @ Clean the disc.
® Disc is scratched. ® Replace with an unscratched disc.
® Player is in an unstable place and vibrates | © Piace the piayer in @ stable place with no
strongly. vibrations.
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