Roland VK-8M Owner's Manual page 53

Problem
Overdrive is not applied
Reverb is not applied
Rotary effect is not applied
Can't set the MIDI channel
MIDI messages are not
transmitted/receive correctly
Can't hear the 1' harmonic bar
Rotary changes to FAST
unintentionally
D Beam sensitivity is incorrect
Registration memory contents
are lost
Check
Overdrive level is too low.
The expression pedal has been
rocked toward the front.
Reverb level is too low.
The [BRAKE] button is pressed,
stopping the rotation (the SPEED
LED has stopped).
This is already specified as the MIDI
channel of another part.
The MIDI channel of each part is not
set correctly.
The Control MIDI Channel is not set
correctly.
The sequencer playback tempo is
not set correctly.
PERCUSSION is turned on.
If PERCUSSION is on, the sound of
the 1' harmonic bar will not be
heard.
D Beam is assigned to
"CRESCENDO."
If the D Beam is assigned to
"CRESCENDO" when the [SLOW/
FAST] button is in the SLOW state,
and you place your hand very close
to the D Beam, the rotary will switch
to FAST.
D Beam sensitivity is incorrect.
The instrument is placed in a
location where there is a large
amount of infrared light.
The power was turned off while
data was being written into
registration memory.
Troubleshooting
Solution
Turn the [OVERDRIVE] knob to
adjust the depth of overdrive.
While carefully monitoring the
volume, depress the toe of the pedal.
Turn the REVERB [LEVEL] knob
clockwise to adjust the reverb level.
Press the [BRAKE] button or the
[SLOW/FAST] button to release the
brake and apply the rotary effect.
Either select a different channel for
the other part that is using that
channel and then make the desired
setting, or select a MIDI channel that
no other part is using.
Set the MIDI channels correctly.
Make sure that the VK-8M's
program changes and expression
data are being transmitted on the
correct MIDI channel.
Have the sequencer play back the
data at the same tempo that was
used when the exclusive data was
recorded.
This is not malfunction.
Moving your hand away from the D
Beam will cause the rotary to return
to SLOW.
Readjust the sensitivity of the D
Beam.
The D Beam will not function
correctly in a location where there is
a large amount of infrared light.
Never turn off the power while data
is being written into registration
memory.
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