66 Troubleshooting
MD4—Owner’s Manual
Troubleshooting

If you’re having difficulty operating MD4 or it doesn’t seem to work as expected, look up the

symptoms in the following table and follow the advice provided.

Symptom Advice
MD4 cannot be turned on!
Make sure the power cord is connected to a suitable AC wall outlet and
plugged into the AC IN connector at the rear of MD4.
Make sure that the MD4 POWER switch is set to the ON position.
If you still cannot turn on your MD4, contact your Yamaha dealer.
Cannot listen to a connected
music source!
Make sure that the input selector switch is set to MIC/LINE. Raise the input
channel fader. Assign the input channel to a track using the GROUP
ASSIGN switches. Press the corresponding MONITOR SELECT GROUP
switch. Turn up the MONITOR LEVEL control.
Cannot record four tracks! Make sure that you are using an MD DATA disc, not a MiniDisc.
Cannot record!
Make sure the disc’s write protect tab is set to unprotect.
Be sure to press a [REC SELECT] button to select a track for recording?
Make sure that you have actually assigned the signal that you want to
record to the track. Use the CUE monitor controls to see if the signal is
actually being sent to the track.
The level meters do not
indicate signal levels!
Normally, the level meters indicate disc signal levels. To see the level of a
group signal you must press the [REC] button to engage Record Pause
mode and press the corresponding [REC SELECT] button. With no disc
loaded the meters indicate group signal levels.
Cannot use the Auto Punch
In/Out function! You must set the LAST REC IN and OUT points to access this function.
Cannot rehearse! You cannot rehearse the first recording on a blank disc. Record something
first, then use the Rehearse function.
Recordings play back at the
wrong pitch! You may have adjusted the pitch prior to recording a track. Reset the pitch
as required.
Cannot access the Punch Off
Line function! You must set the LAST REC IN and OUT points to access this function.
Cannot use the Punch In/Out
or Ping-Pong functions!
If a song was edited on another MD device, MD4 may not be able to use
these functions. In this case, try copying the song with the Song Copy
function and then try and edit the copy.
Songs recorded on other MD equipment may be protected by the SCMS
protection system. In this case, editing is not allowed.
Cannot send a channel signal
to the AUX SEND! As well as turn up the AUX control you must raise the channel fader. This is
because the AUX SEND signal is sourced post-fader (i.e., after the fader).
Cannot make a Cue List ! Make sure that the selected song contains some markers.
Cannot play the Cue List! Make sure all steps in the Cue List are not set for zero repeats (n=0).
Make sure that cues are entered in the correct order (e.g., “s–>e” or
“3–>4”, not “e–>s” or “4–>3”).
MIDI sequencer does not
synchronize to MD4!
Make sure that your MIDI sequencer supports MTC or MIDI Clock.
Make sure that the MD4’s MTC or CLK function is turned on. MTC appears
on the display when MTC is used and MASTER appears when MIDI Clock is
used.
Make sure your MIDI sequencer is set to synchronize to an external MTC or
MIDI Clock source. Refer to the MIDI sequencer’s user manual.
MD4 can locate quickly, so some MIDI sequencers may not be able to syn-
chronize immediately, especially when MD4 is in A–B Repeat mode.
A disc is loaded but the display
shows No Disc! Make sure that the disc is loaded correctly.
Cannot eject a disc! Press [TOC WRITE] to write the TOC data to disc. Then eject the disc.