Why is the red POWER AMP STATUS light on my PowerStage 700 Bass amp lighting up?
NOTE: The POWER AMP STATUS light will toggle off when the amp is in MUTE mode.
This LED serves multiple purposes, indicating the following:
Power Amp voltage clipping
Power Amp current limiting
Power Amp over-temperature warning
LIGHTING OF THIS INDICATOR CAN BE CAUSED BY THE FOLLOWING:
Level control set too high on PowerStage.
The light will clip if the PowerStage 700 Bass main volume level is set great enough to send the power amp section into clipping (distortion). Flashing means that the level is approaching clip (this is ok), solid can mean the amp section is clipping (distortion will probably be heard).
Shorted speaker cable
troubleshoot by checking speaker cable for breaks or damaged plugs.
Speaker voice coil shorted to speaker pole piece or frame.
check speaker with other amps, or use multimeter to check for coil short in voice coil.
Either + or – output signal connected to Ground.
check cables to make sure that there are not multiple ground connections.
Total speaker impedance (parallel combination of speakers/cabinets) in excess of minimum rating.
The light will also flash if the input source level is too high. Turn down the input source.
Internal fault. Contact support@seymourduncan.com for further instructons.
If the above troubleshooting does not resolve problem, contact support for next steps.
Insufficient power to the amplifier
using the AC outlet on a Multi-Pedal Power Supply might not provide sufficient wattage to run your PowerStage amp. We recommend plugging directly into an extension cord or power strip that is running to a power outlet.
Over Temperature Protection: The over-temperature circuit monitors the temperature in the output stage and power supply. As the temperature in either approaches 125° C (257° F), the Pwr Amp Status indicator will light continuously.
When the temperature reaches 150° C (302° F), the amplifier will shut down until the temperature drops below 120°C (248° F), at which point it will reset.
Lighting of the Power Amp Status indicator can be caused by the following:
Lack of air circulation around amplifier.
Blocked vents.
Blocked or stopped cooling fan.
Excessively high ambient temperatures.
Heavy loading of output (low impedance loads) coupled with high power demand.