Page 13
Troubleshooting
If problems occur, the first step should be to verify that the PA 12-45 is set to the proper line voltage
for your AC power source and that your power source is operating correctly.
Problem: No sound is heard from any channel (the On/Off LED is not lit)
You have no AC power
• Verify that the circuit is live and the rear panel Power switch is On
• Verify that the line cord on the PA 12-45 is fully inserted and is tight
Problem: No sound is heard from any channel (the On/Off LED is lit red)
The PA 12-45 is in Standby mode
• If the PA 12-45 is in “On” power mode, press the On/Off button
• If the PA 12-45 is in “Trigger” power mode, verify that a trigger signal is present
• If the PA 12-45 is in “Auto” power mode, verify that audio signal is present at an input
• If the PA 12-45 is in “Auto” or “Trigger” mode, yet fails to respond to an appropriate trigger input,
it may be in the manual override mode; switch the power Off and back On (using the rear panel
power rocker switch) to clear the override
Problem: No sound or distorted sound is heard from one or more channels
(the Power LED and all channel status LEDs are lit blue)
The PA 12-45 is On and is not indicating a fault
• Verify that the input configuration for that channel is correct
• Check the Bridge/Stereo switch that controls the pair of channels involved
• Verify that the Volume for that channel is turned down
• Check your source and your input cabling
• Check your speakers and speaker connections
Problem: No sound is heard from one or more channels
(one or more channel status LEDs are FLASHING blue)
The PA 12-45 is indicating a fault on one or more channels (the flashing LEDs correspond to the
zone where a fault has been detected). A fault with either channel in a zone will result in a fault for
that zone; in Stereo/Separate Mode, both channels in that zone will be disabled.
• Verify that the speaker cable(s) and speaker terminals are not shorted
• Verify that the speaker itself is not shorted or damaged
(try the speaker on another channel and see if the fault “moves”)
• Verify that the source is not faulty
(try that input cable on another input and see if the fault “moves”)
• Disconnect all inputs and outputs and reset the PA 12-45
(turn the rear panel Power rocker switch Off and back On)
If the fault condition persists after all inputs and outputs have been disconnected and the
fault has been reset, and the Voltage Select switch is in the proper position, please contact
Sherbourn Technical Support.
