XPA U 1004 SB and XPA U 2002 SB • Operation
18
Troubleshooting
The front and rear panels have LED warning indicators, as described below.
Amplifier Fails to Exit Standby Mode Promptly
The input channel signal LED lights green when an input signal is detected.
Power LED Color
Signal LED State
Problem Description
Problem Solution
Amber
Not lit
No output signal
No input detected,
verify the input
signal. If input signal
is present, raise
input level until
signal LED lights.
Green or Amber
Lit intermittently
Unit does not promptly
exist standby mode when
input signal is present
The output signal
level of the source
may be too low to
cross the signal
detection threshold
of the amplifier (see
amplifier specs for
details). Increase
the signal level of
the source until the
signal LED lights
consistently, or
defeat the standby
timer.
Amber
Lit
No output signal
Ampilifer has been
placed in standby
mode and the
output has been
turned off. Check
remote port. DC
Fault may have
been detected (see
below).
Amber
Lit
DC Fault is detected. Unit
does not exit standby.
Disconnect power
then disconnect
the remote port.
Then, reconnect
power to the unit to
determine if the unit
immediately goes
into standby upon
power up. In such
a case, service the
unit.
Summary of Contents for XPA U 1004 SB
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