IVIE MPS 2300, User Manual

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lvie Technologies
MPS 2300
Operational
Troubleshooting
volume and input gain controls including Remote if used.
Also insure rear panel P o w e r L i m i t is set to desired value
(fully CW gives maximum output level). Test on other
channel.
Watch Output Meter and rear panel Clip indicator during
distorted sound. If Clip indicator lights without full scale
meter deflection, there is a shorted speaker cable, the
speaker is faulty, or the amplifier channel is defective. If Clip
indicator lights with full meter deflection, the amplifier is
being overdriven, so cause of weak sound must be in
speakers or wiring. If Clip indicator does not light during
distortion, the distortion is happening outside the amplifier
section. Check adjustment (gain staging) of all gain
controls, input connections and sources, and speakers.
Weak and Distorted
Sound.
Generally caused by a bad connection. If same on all
sources, check Pre-out/Amp-in and speaker connections. If
on a specific source, check input connections.
Sound Cuts In and
Out.
If on all sources, check Master EQ, outboard equalizer (if
inserted) and speakers. If on a specific source, check input
EQ and source equipment.
Sound has Bad Tone.
Check gain staging. Check P o w e r L i m i t control. If a 70V
system, check to make sure Output Voltage Switch and
speaker connections are set for 70V operation.
Lacks Power.
Unwanted Noises.
Defined as a rounded 60 Hz tone. Severe hum is
caused by broken cables or jacks, with disconnected
ground (shield). Also caused by corroded connectors.
A milder form of hum is usually caused by ground
loops. Try repositioning the input cables away from
the various components.
Hum.
Defined as a very "razzy" kind of hum. Usually caused
by interference from solid-state light-dimmer circuits.
Follow the same precautions shown above, and make
sure the electronics are not connected to an AC outlet
which has a dimmer control.
Buzz.