Appendix; Troubleshooting - Yamaha MT4X User Manual

Appendix

Troubleshooting

If you experience difficulty operating the MT4X, or it does not seem to be working as it
should, look up the problem in the following table. You may find it is just a simple error,
easy to correct.
Symptom
The MT4X cannot be
powered ON.
Cannot record.
Cannot hear a
connected instrument.
Recordings sound
noisy or distorted.
Recordings sound
dull, suffer from wow
and flutter, or are of
poor quality.
Recordings playback
at the wrong pitch.
Tape sync does not
function correctly.
User's Guide
Possible Cause
The power cable is not
correctly connected.
The POWER switch has
not been correctly set.
Note: If the MT4X still cannot be powered ON, please contact your
Yamaha dealer.
The REC SELECT key is
not set correctly.
The setting of the ASSIGN
key(s) is incorrect.
The cassette is loaded
incorrectly.
The cassette's record
protect tabs have been
removed.
The corresponding input
select key is set incorrectly.
The fader or monitor is set
incorrectly.
The recording level is set
incorrectly.
The record/playback head
and capstan is dirty.
The wrong type of cassette
is being used.
The cassette tape is
defective.
The PITCH control was
reset during recording.
The tape speed was reset.
The SYNC key was not
pressed when the dbx™
system was ON.
The FSK track was
recorded at too low a level.
The MIDI-to-FSK
converter is incorrectly
connected.
Appendix
Solution
Make sure the power cable is connected to a
suitable AC outlet and plugged into the
AC IN connector on the MT4X's rear panel.
Make sure the POWER switch on MT4X's
rear panel is pressed ON.
Set the REC SELECT key correctly.
Select the correct ASSIGN key(s) for the
group and tracks you intend to use.
Make sure the tape is firmly inserted in the
cassette compartment.
Make sure that the cassette's record protect
tabs are intact.
Set the input select key to the correct
position.
Raise the fader for the input module. Make
sure the MONITOR SELECT switch is set to
CUE and adjust the CUE LEVEL control.
Set the channel fader so that the level
occasionally reaches +9 dB (with dbx™ ON
or +3 dB with it OFF). If the signal level is too
low, the recording may sound noisy. If it is
too high, distortion may occur.
Clean the record/playback head and
mechanism. See "Maintenance" on page 45.
Be sure to use high-quality Type II (High
Bias, 70 µs EQ) chrome cassettes.
Try a new cassette tape.
Set the PITCH control to the "0" centre-
detent position.
Press the tape speed select key to set the
MT4X back to the correct tape speed.
Press the SYNC key and connect the FSK
source to track 4.
Re-record the FSK signal. Make sure the
recording level is set to about +3dB.
Make sure the connections are correct.
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