Roland V-Mixer VM-3100 Owner's Manual page 66

Troubleshooting
If the VM-3100/3100Pro does not operate as expected, check the following points before concluding that there is any
malfunction or breakdown. If after checking the indicated items the problem persists, consult your nearby Roland Service
or your Roland dealer.
lm No sound is produced.
- The power for the VM-3100/3100Pro or connected
device has not been switched on.
- One or more audio cables are not properly connected.
- There is a short in an audio cable.
- The volume of a connected amp or input device is
turned down or is turned down.
- The VM-3100/3100Pro volume controls are turned
down.
Channel Fader
MASTER Fader
MONITOR Knob
— In certain instances, such as when calling up
SCENE MEMORY, the actual volume level may not
correspond to the fader positions. Confirm the fader
operation method being used.
- The volume level of the instrument connected to
VM-3100 is too low.
— Could you be using a connection cable that contains
a resistor? Use a connection cable that does not
contain a resistor.
@ There is no sound from a
specific channel.
- The INPUT GAIN knob is turned down.
-+ The channel volume level is down.
66
~» In certain instances, such as when calling up
SCENE MEMORY, the actual volume level may not
correspond to the fader positions. Confirm the fader
operation method being used. (p.26)
- AUDIO CH has not been set for the Fader Assign
function. (p.12)
- The Solo or Mute functions are being used. (p.54, 55)
- BUS ASSIGN is selected for the channel. (p.55)
~» When BUS ASSIGN is selected for the channel, the
signal is not output to MASTER OUT.
@ There is no sound from the
headphones.
- The MONITOR LEVEL knob is turned down.
- The MONITOR DIGITAL IN button is pressed, setting
this to ON. (p.56)
- MASTER OUT is selected for the MONITOR SOURCE.
@ There is no sound from the
digital input.
- MASTER CLOCK is not set to DIGITAL IN. (p.58)
- The sampling rates are not matched.
~» The VM-3100/3100Pro is capable of receiving
digital signals only at a sampling rate of 44.1 kHz.
Confirm the sampling rate of the input device.
™@ There is excessive noise or
distortion.
- The input sensitivity is not properly adjusted.
—» Setting the input sensitivity too high causes the
sound to be distorted, while setting it too low
results in the sound being obscured by noise.
Rotate the INPUT GAIN knobs to adjust the
sensitivity so that the meters fluctuate at as high a
level as possible within the range of -12 dB to 0 dB.
- Acomputer monitor or other noise-inducing
equipment is placed near a mic.
- EQis being used.
— Some equalizer settings may cause distortion in the
sound, even when the PEAK indicator is not lit. Try
readjusting the equalizer.
@ The volume level does not change,
even when the fader is moved.
- FADER ASSIGN has not been set properly. (p.12)
— The source upon which the VM-3100/3100Pro's
channel faders are to operate can be selected by
pressing the [AUDIO CH] or [MIDI CH] buttons.
Confirm that the assignment has been made
correctly.
@ Internal Effects
No effects are being added.
- The EFFECT LEVEL knob is turned down. (p.22)
- The effects send level from the channel is turned down. (p.22)
- Insert is already being used on another channel.
@ MIDI Devices
When set to MASTER, the VM-3100/3100Pro cannot
control the connected MIDI sequencer.
- The MIDI cable is not properly connected.
- There is a short in the MIDI cable.
- ""OUT/Thru Sel" (the MIDI THRU switch) is not set to
"Out." (p.56)
- The MIDI send/receive channels do not match. (p.36, 45)
- The MIDI sequencer settings are incorrect.
- The MIDI sequencer is not enabled for reception of
messages.
When set to MASTER, the MIDI Sequencer
cannot control the VM-3100/3100Pro.
- The MIDI cable is not properly connected.
- There is a short in the MIDI cable.
- The MIDI send/receive channels do not match.
- The MIDI sequencer settings are incorrect.
The VM-3100/3100Pro is not enabled for reception of
messages.
m@ RMDB Il
No sound is output from the RMDB II connector.
- The designated cable is not being used.
~ Regular computer cables cannot be used for
connecting to the RMDB II connector. Use a cable
designed especially for use with the RMDB II
connector.
- MASTER CLOCK is not set to RMDB II. (p.58)
- The sampling rates are not matched.
— The VM-3100/3100Pro is capable of receiving
digital signals only at a sampling rate of 44.1 kHz.
Confirm the sampling rate of the input device.