User guide

Troubleshooting
Under different circumstances, the front panel LED lights green or amber, which provides
diagnostic information.
Amplier Fails to Exit Standby Mode Promptly
Power LED
Color
Problem Description Problem Solution
Amber Nooutputsignal.
• No input detected: verify that there is an
input signal.
If a signal is present, raise the input level.
• The amplifier is in standby mode and the
output has been turned off. Check the
remote port.
Greenor
Amber
Slowtoexitstandby
modewhenasignalis
present.
• The input signal may be too weak. Raise
the input level.
Amplier Enters Standby Mode Too Early
Power LED
Color
Problem Description Problem Solution
Greenor
Amber
Entersstandbymode
early.
• The input signal may be too weak. Raise
the input level.
MPA 401-70V and MPA 401-100V • Setup and Operation 13