Trouble Shooting - Avalon VT-737SP Operation Manual

8.0 Trouble Shooting

If you experience any problems with your
Vt-737sp, please make sure to first isolate the
problem to your Vt-737sp. In many cases the
problem can be a bad cable instrument, or
another piece of equipment in the signal path.
It is easiest to isolate the problem by removing
as many pieces of extraneous gear in the
signal path as possible. If you believe that your
Vt-737sp has problem, please set up the
following test system:
Problem
No power
No power
Lights dim /
no sound
No sound
No sound
No sound
No sound
Hum or
buzzing noise
Distorted sound
Distorted sound
Overloading
recording device
Page 42
Cause
Power cable on back of chassis not
securely plugged in
Fuse blown due to power surge or
improper AC voltage setting
Improper AC voltage setting
Input selector set in wrong position
Bad cable
XLR cable not in correct input on
back of unit (Microphone, Line)
+48v not on for a microphone that
requires phantom power
Bad cables or ground loop
Microphone or input source
overloading
Vt-737sp may be overheating
Recording device is -10dB device,
Vt-737sp is +4dB device
1. Plug your input source (microphone, instru-
ment or line input) into Vt-737sp; make sure to
check your cable.
2. Output of Vt-737sp directly to powered
monitors or monitor system. Use the OUTPUT
control on the Vt-737sp to adjust volume and
check this cable as well.
Once you have isolated the problem to the
Vt-737sp please check the following list of
problems and corresponding suggested solu-
tions.
Solution
Check cable
Replace fuse and check AC voltage
setting (page 13)
Check AC voltage setting (page 13)
Make sure input selector switch is set to
the physical input that you are using (Mic,
Instrument, Line)
Check cables
Check that input cable is plugged into
intended input
Press in +48v to supply microphone
with phantom power
Check all cables and grounding system;
lift ground on Vt-737sp (page 13)
Try a different microphone or input source;
adjust input preamp gain
Make sure Vt-737sp has proper
ventalation (page 14)
Turn down output control on Vt-737sp
to adjust to usable recording level
Avalon Vt-737sp Operation Manual
Trouble Shooting