pT2-500 Microphone Preamplifier OPERATION MANUAL
Version 1.0 12 ©2010 TRUE SYSTEMS
Symptom Solution
No signal output. Main power switch
on rack power supply is ON, but no
LED’s illuminate on pT2-500.
Check AC power source and cord connection
Check fuse on rack power supply.
Check that preamp card edge connector is
properly seated.
No signal output. Main power switch
on rack power supply is ON and
appropriate LED’s illuminate on
pT2-500.
Check status of phantom power.
Check continuity of mic and electric
instrument cables.
Check continuity of output cables.
Make sure GAIN control is adjusted.
Output signal is distorted. Outputs
are connected for balanced
operation.
Make sure GAIN is adjusted so that the OL
indicator does not activate during the audio
program.
Make sure the high output capability of this
unit is not overloading the device or
monitoring system to which it is connected.
Check continuity of output cable.
Make sure outputs are not connected to a
load impedance of less than 600 ohms.
Output signal is distorted. Outputs
are connected for unbalanced
operations.
Make sure the minus (-) output signal pins
are connected to the shield and not left
unconnected. See “Output Cable
Connection” section, page 9.
Check troubleshooting tips for balanced
operation (above).
Hum can be heard in the audio
program.
Check continuity of output cables
(particularly shields).
Alternatively, disconnect shields on one end
of output cables (not appropriate for
unbalanced connections).
Electric instrument connected to a
Direct Input does not produce a
signal or signal is distorted.
Check continuity of electric instrument
cables.
Check the batteries or AC power source of
any “foot pedal” effects processors
connected to the Direct Input.
Make sure that the instrument cables have
standard tip-sleeve ¼” phone plugs.
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