Onkyo TX-27 - Troubleshooting Guide

Trouble-shooting Guide
Trouble
Cause
Remedy
No power.
@ AC fuse blown.
@ Contact Onkyo dealer.
Power but no sound.
[.
@ Tape monitor on.
@ Bad connections.
@ Speaker protection fuse blown — short-
circuit in speaker connections.
e@ Switch to off.
@ Check input leads, speaker leads, pin plugs, etc.
e@ Contact Onkyo dealer.
Hum, low frequency noise.
@ Poor or no input ground.
@ Poor or no phono motor ground.
@ Power source hum.
@ Check outer conductor of input plugs.
@ Check for proper ground connection.
@ Try reversing power plug in socket.
L-
Howling when the volume is turned
@ Turntable and speakers are too close
together.
@ Move them farther apart.
yee
Rough
or
scratchy
sound.
High
range
is
not
clear.
e Stylus of pick-up is worn.
e Stylus tip is dirty.
@ Treble contro! too high.
@ Replace.
@ Clean.
@ Turn treble control down.
:
—
Buzzing noise on AM (particularly
conspicuous at night or with weak
stations).
—
e Noise from electrical apparatus such as
fluorescent lamp.
@ Move unit to different position.
e@ Set up outdoor AM antenna.
Hien pitched noise.
| epeakling noise on AM and FM.
Signal strength indicator (only
TX-37 increases sufficiently but
the sound is distorted and the
separation is bad.
Signal strength indicator (only
TX-37)
varies
unsteadily.
Hiss
on
FM.
No station is recalled when a preset
key is pressed.
2]
@ Noise from TV.
@ Move unit away from TV set.
@ Noise caused by turning fluorescent
lamp on and off.
@ Noise from automobile ignition.
e@ Station is too strong.
@ Muitipie reflection of the radio waves
because of tall buildings or mountains.
@ Station is too weak.
e Stereophonic FM broadcasts cover
only about half the distance of an
ordinary broadcast.
@ The power switch has not been turned
on for along time or the power cord
has been unplugged for a long time.
|
@ Move antennaas far as possible from the fluorescent lamp.
@ Install an FM outdoor antenna as far as possible from the
road.
@ Change the position or direction of the outdoor antenna.
@ Change to T-shaped antenna.
@ Use antenna which has better directivity and select a
point where the distortion is least.
@ Install an outdoor FM antenna.
© Change the position or direction of the outdoor antenna.
@ The memory contents are lost if the power is not turned
on and off a few times each month, Store all stations in
the memory again and remember to turn power on and
off a few times each month.
The
tuning
steps
by
which
the
tuned
frequency
changes
on
each
band
have
been
set
at
the
factory
to
the
proper
value
for
the
country
where
each
unit
is
to
be
sold.
If
you
use
the
unit
in
acountry
where
a
different
tuning
step
is
required
or
if
the
broadcast
frequencies
in
your
country
change
so
that
you
can
not
tune
in
radio
stations
precisely,
take
this
unit
to
an
authorized
Onkyo
Service
Center.
Memory Preservation
This
unit
does
not
require
memory
preservation
batteries.
A
built-in
memory
power
back-up
system
preserves.
the
contents
of
the
memory
during
power
failures
and
even
when
the
unit
is
unplugged.
The
unit
must
be
plugged
in
and
the
power
switch
tu
rned
on
and
off
once
in
order
to
charge
the
back-up
system.
Note
that
since
this
is
not
a
permanent
memory,
the
power
switch
must
be
turned
on
and
off
a
few
times
each
month
to
keep
the
back-up
system
operative.
The
period
of
time
during
which
memory
contents
are
preserved
after
power
has
last
been
turned
off
varies
depending
on
climate
and
placement
of
the
unit.
On
the
average,
memory
contents
are
protect-
ed over a period
of
3
to
4
weeks
(a
minimum
of
2
weeks)
after
the
last
time
power
has
been
turned
off.
This
period
is
shorter
when
the
unit
is
exposed
to
very
high
humidity
or
used
in
an
area
with
an
extremely
humid
climate.