Onkyo TX-903 User Manual

Trouble shooting guide
NOTE (TX-903 oniy):
If a problem occurs, first operate the unit using the frant panel
controls to confirm that it is not due to a malfunction (or worn
a le AC
out batteries) of the remote control transmitter.
Cause
@ Power cord is disconnected. ® Connect power cord.
@ AC fuse blown. ® Contact Onkyo Service Center.
® Tape monitor switch on. ® Switch to off.
® Audio muting switch on.(TX-903 only) | @ Switch to off by remote control transmitter.
@® Bad connections. @ Check input ieads, speaker leads, pin plugs, etc.
® Amplifier protection circuitry has been | @ Contact Onkyo Service Center.
activated. ee
Hum,
low
frequency
noise
®
Poor
or
no
input
ground.
@
Check
outer
conductor
of
input
plugs.
@
Poor
or
no
phono
motor
ground.
@
Check
for
proper
ground
connection.
Howling
when
the
volume
is
turned
up.
|
@
Turntable
and
speakers
are
too
close
®
Move
them
farther
apart.
Power but no sound.
together. ee ee es
Rough
or
scratchy
sound.
High
range
is
|
@
Stylus
of
pick-up
Is
worn.
@
Replace.
not
clear.
®
Stylus
tip
is
dirty.
®
Clean.
@ Treble control too high. _ _@ Turn treble control down.
AM
stations
cannot
be
received.
®
AM
loop
antenna
is
not
attached.
@
Connect
the
included
AM
loop
antenna
to
the
AM antenna terminals. _
Buzzing
noise
on
AM
(particularly
con-
|
@
Noise
from
electrical
apparatus
such
@
Move
AM
loop
antenna
to
different
position.
spicuous
at
night
or
with
weak
stations).
as
fluorescent
lamp
.
®
Set
up
outdoor
AM
antenna.
__
High
pitched
noise
or
buzzing
noise
on
®
Noise
from
TV.
®
Place
the
AM
loop
antenna
as
far
as
possible
from
the TV.
@ Move unit away from FV set.
AM.
i a a EN ST
® Noise caused by turning fluorescent
lamp on and off.
@ Noise from automobile ignition.
@ Move antenna as far as possible fram the flu-
orescent lamp.
@ install and FM outdoor antenna as far as possible
from the road.
®@ Change the position or direction of the outdoor
antenna.
Crackling noise on AM and FM.
@ Change to T-shaped antenna.
@ Use antenna which has better directivity and se-
lect a point where the distortion Is least.
®@ Station is too strong.
@ Multiple reflection of the radio waves
because of tall buildings or mountains.
FM tuned and stereo indicators light but
sound is distorted and stereo separation
is bad.
FM tuned and stereo indicators flicker
on and off and hiss is heard on FM.
@ Install an outdoor FM antenna.
® Change the position or direction of the outdoor
antenna.
® Station is too weak.
®@ Stereophonic FM broadcasts cover only
about half the distance of monaural
broadcasts.
®@ The memory contents are lost if the power switch
is not turned on a few times each month. Store
all stations again and remember to turn the power
on a few times each month.
® The power switch has not been turned
on for a long time or the power cord
has been unplugged for a long time.
No station is recalled when a preset sta-
tion number ts input.
®@ No batteries in remote control trans- @® Insert batteries.
mitter. ®@ Replace batteries.
® Batteries have worn out.
Front panel controls function but remote
control transmitter does not. (TX-903
only)
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
a
country
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,
contact
your
authorized
Onkyo
Service
Center.

Onkyo TX-903 Specifications

General

Brand	Onkyo
Model	TX-903
Category	Amplifier
Language	English