Troubleshooting - Yamaha K-903 Mode D'emploi

If your cassette deck fails to operate normally, check the following table. It lists common operating errors and simple measures
which you can take to correct the problem. If it cannot be corrected, or the symptom is not listed, disconnect the deck's power
cord and contact your authorized YAMAHA dealer or authorized service center for help.
Fault
Tape doesn't move in recording or
playback.
If it happens that this unit does not
work normally.
REC/PAUSE button fails to function.
Sounds become faint and sometimes
inaudible.
Recorded sound is distorted.
Tape is playing back, but no sound is
heard.
Excessive noise.
Excessive wow (wavering of the
sound).
Tape stops in the middle of recording
or playback.
Fails to record.
Search does not operate correctly.
High frequencies in the playback
sound are emphasized and unpleasant
to listen to, and noise level (hiss) is
also high.
16

TROUBLESHOOTING

Cause
÷ Power plug is not properly plugged in.
÷ Cassette shell is warped or damaged.
÷ There is an influence of strong external
noise (lightning, excessive static
electricity, etc.) or a misoperation was
performed while using this unit.
÷ No cassette tape loaded.
÷ Protective tabs are broken off.
÷ Head is dirty.
÷ Head is magnetized.
÷ Tape is damaged or of poor quality.
÷ Tape is bad (stretched, deformed, etc.).
÷ Cassette shell is warped.
÷ Recording level is too high.
÷ Faulty connection between deck and
stereo amplifier/receiver.
÷ Head is dirty.
÷ Head is magnetized.
÷ Worn out or poor quality tape.
÷ Connection(s) improperly made.
÷ Affected by external electrical noise.
÷ Dirty capstan, pinch roller, etc., or poor
tape.
÷ Tape is wound unevenly.
÷ Slack tape, or tape spillage wound
around capstan.
÷ REC LEVEL control is set to too low.
÷ Protective tabs are broken off.
÷ Blank section is too short.
÷ Recorded section has low-level portions.
÷ Conversation, etc. has been recorded.
÷ Dolby NR-recorded tape is played back
in OFF position.
Cure
÷ Reinsert plug properly.
÷ Do not play damaged tapes.
÷ Turn the unit off and disconnect the AC
power from the AC outlet. After about
30 seconds have passed, connect the
power and try again.
÷ Load a cassette tape.
÷ Change tape or cover protective hole
with adhesive tape.
÷ Clean head.
÷ Demagnetize head using head
demagnetizer.
÷ Change to a different tape.
÷ Replace with a fresh tape.
÷ A warped cassette shell cannot be
fixed. Replace with another tape and
test.
÷ Check input level with signal level meter
and use lower rec level when recording.
÷ Check and secure connections.
÷ Clean head.
÷ Demagnetize head with head
demagnetizer.
÷ Change to better tape.
÷ Check input and output connections
and reinsert properly.
÷ Move deck away from electrical
appliances (TV, fluorescent light,
electric blanket, etc.).
÷ Clean capstan and pinch roller, or
change to better tape.
÷ Rewind tape.
÷ Insert pencil in hole in cassette shell
and turn to take up slack.
÷ Adjust REC LEVEL control.
÷ Change tape or cover protective hole
with adhesive tape.
÷ Blank sections must be at least 4
seconds long.
÷ No remedy
÷ No remedy
÷ Play back in appropriate Dolby NR
position.