Troubleshooting - Denon UPO-250 Operating Instructions Manual

Norma! operation may not be possible if there is dirt or
other substances on the surface of the internat objective
lens or sensor.
TROUBLESHOOTING
1. Cheek that the connections are proper.
2. Check that you are operating the system according to the instructions in the manual.
Avoid using ultrasonic humidifiers nearby.
if uftrasonic humidifiers are used nearby, the calcium, etc.,
v2
included in the water may be scattered into the air, causing
white dust to accumulate on the surface of the objective
These parts must be cleaned periodically depending on the
Check the following teble if the system does not seem to be working properly.
if the problem is not solved after checking these points carefully, the system may be malfunctioning. Switch off the power and contact
your store of purchase.
Common
22
Power does not come on
when POWER button
pressed.
No sound produced from
speakers.
Tredie not produced.
Orientation of sound field
not clear.
Cannot record when REC/
REC MUTE button pressed.
Sound is interrupted during
playback and recording, or
treble sound is low.
Wow (fluctuation) is heavy
during playbsck and re-
cording.
Buzzing noise heard during
Playback.
Hissing noise heard during
FM reception.
Hissing or scratchy noise
heard during AM reception.
Hum noise heard during
AM reception.
Disc loaded but total num-
ber of tracks not displayed.
Operation not performed
when buttons pressed, or
playback stops in middie of
track.
Buzzing noise mixed in with
CO sound.
© Power cord not plugged into outlet.
© VOLUME control set to minimum.
© Headphones are plugged in.
© Speaker cables not connected to
speaker terminals.
© Spesker polarities (+: and =") not
@ matched.
e@ No cassette tape loaded.
e@ Acci sure prevention tabs of
cassette broken off.
© Head dirty.
© Tape stretched.
© Cspstens and pinch rollers dirty.
@ Noise from TV.
© {Some TVs produce noise.)
@ Antenna not pointed in proper direc-
tion,
@ Signals weak.
@ Noise from TV, aetc., or interference
from other stations.
@ Signals coming over power cord are
modulated by power source fre-
quency.
@ Disc loaded upside-down.
© Disc dirty.
« Non-standard disc loaded.
@ Disc toaded upside-down.
e Foreign object in disc holder.
© Disc dirty.
« Disc scratched.
@ Dust, fingerprints. or spittle on disc.
@ Disc scratched.
@ Player set in shaky. unstable place.
e@ Signals coming over power cord are
modulated by power source fre-
quency.
« Plug cord into outlet properly.
@ Turn VOLUME contro! clockwise ( M ).
@ Disconnect headphones.
@ Connect speaker cables properly.
@ Connect speaker cables properly.
e
@ Load tape.
e Apply cellophane tape over holes.
© Clean.
@ Replace tape.
© Separate TV from 5
© Turn off TV.
@ Change direction of antenna.
@ install outdoor antenna.
e Turn off TV.
© Change position of loop antenna.
© install outdoor antenna.
© Plug in cord in opposite direction.
@ install outdoor antenna.
@ Replace with standard disc.
© Reload disc.
@ Remove disc and remove foreign
object.
e Clean disc.
@ Replace with non-scratched disc.
piace of installation.
For details, contact your store of purchase.
Dew {Condensation} Phenomenon
Dew (water droptets) may form on the lens of the internal optical
system or on the disc, or on the rotating parts of the tape deck in
situations such as the following:
@ Soon after a heater is put on.
e@ When the set is placed in a steamy or damp room.
@ When the set is moved from a cold place to a warm room.
This system consists of precision components using microprocessors. Avoid using it in places where there is much external noise. if
used is such places, the system may not operste properly, but this is not a problem with the system. if the system does not operate
properly, try performing the desired operation again.
lens or sensor, resulting in improper operation.
When Condensation Forms
The signais of the disc may not be read and this product will not
operate properly. To remove the condensation, take out the disc
and switch on the power. The condensation will evaporate within
1 hour and the set will operate normally.
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