Appendix

44

User’s Guide

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 Possible Cause Solution

The MT4X cannot be
powered ON. The power cable is not correctly
connected. 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.
The POWER switch has not been
correctly set. Make sure the POWER switch on MT4X’s rear panel
is pressed ON.

Note:

If the MT4X still cannot be powered ON, please contact your Yamaha dealer.

Cannot record. The REC SELECT key is not set
correctly. Set the REC SELECT key correctly.
The setting of the ASSIGN key(s)
is incorrect. Select the correct ASSIGN key(s) for the group and
tracks you intend to use.
The cassette is loaded incorrectly. Make sure the tape is firmly inserted in the cassette
compartment.
The cassette’s record protect tabs
have been removed. Make sure that the cassette’s record protect tabs are
intact.
Cannot hear a connected
instrument. The corresponding input select
key is set incorrectly. Set the input select key to the correct position.
The fader or monitor is set
incorrectly. Raise the fader for the input module. Make sure the
MONITOR SELECT switch is set to CUE and adjust
the CUE LEVEL control.
Recordings sound noisy or
distorted. The recording level is set
incorrectly. 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.
Recordings sound dull,
suffer from wow and
flutter, or are of poor
quality.
The record/playback head and
capstan is dirty. Clean the record/playback head and mechanism.
See "Maintenance" on page 45.
The wrong type of cassette is
being used. Be sure to use high-quality Type II (High Bias, 70
µ
s
EQ) chrome cassettes.
The cassette tape is defective. Try a new cassette tape.
Recordings playback at
the wrong pitch. The PITCH control was reset
during recording. Set the PITCH control to the “0” centre-detent
position.
The tape speed was reset. Press the tape speed select key to set the MT4X back
to the correct tape speed.
Tape sync does not
function correctly. The SYNC key was not pressed
when the dbx™ system was ON. Press the SYNC key and connect the FSK source to
track 4.
The FSK track was recorded at too
low a level. Re-record the FSK signal. Make sure the recording
level is set to about +3dB.
The MIDI-to-FSK converter is
incorrectly connected. Make sure the connections are correct.