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Post by greddy09sc on Sept 2, 2021 12:18:27 GMT -5
I have an MC-700 processor with an XPA-5 Gen 2 Amp.
The trigger wire is hooked up.
When I turned off the BASX MC-700 the XPA-5 turns off as expected. However, after about 15 seconds, the amp turns back on by itself. This didn't happen before and recently started.
I have tried resetting the MC-700 back to default settings and have also power-cycle the amp from the switch in the back.
I also updated the MC-700 to the latest firmware.
I tried doing a search here in the forums but didn't find anything.
Thoughts on what the issue is?
Thank you.
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Post by donh50 on Sept 3, 2021 8:23:44 GMT -5
Try pulling and reseating the trigger cable at both ends.
What happens if you pull the trigger wire? Does it turn off and/or come back on then? If you have a cheap voltmeter (DMM)you could measure the voltage at the trigger wire to see if the MC-700 is still putting out a trigger voltage (~12 V). All that would help to narrow the problem down to the preamp or the amp.
Finally, can you replace the trigger cable? Maybe it is a bad wire and something strange is causing the voltage to float high or pick up enough noise to trigger the amp.
HTH - Don
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Post by greddy09sc on Sept 3, 2021 9:55:46 GMT -5
Try pulling and reseating the trigger cable at both ends. What happens if you pull the trigger wire? Does it turn off and/or come back on then? If you have a cheap voltmeter (DMM)you could measure the voltage at the trigger wire to see if the MC-700 is still putting out a trigger voltage (~12 V). All that would help to narrow the problem down to the preamp or the amp. Finally, can you replace the trigger cable? Maybe it is a bad wire and something strange is causing the voltage to float high or pick up enough noise to trigger the amp. HTH - Don Hi Don, Thank you much for your response. It doesn't happen when I pull the trigger wire, Amp remain off. I have also tried reseatign the trigger cable. I will try testing the voltage and switching out the wire to see if it helps and will keep you posted. |
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Post by vcautokid on Sept 3, 2021 11:06:20 GMT -5
Do you have another trigger cable to try?
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Post by donh50 on Sept 3, 2021 13:32:49 GMT -5
Try pulling and reseating the trigger cable at both ends. What happens if you pull the trigger wire? Does it turn off and/or come back on then? If you have a cheap voltmeter (DMM)you could measure the voltage at the trigger wire to see if the MC-700 is still putting out a trigger voltage (~12 V). All that would help to narrow the problem down to the preamp or the amp. Finally, can you replace the trigger cable? Maybe it is a bad wire and something strange is causing the voltage to float high or pick up enough noise to trigger the amp. HTH - Don Hi Don, Thank you much for your response. It doesn't happen when I pull the trigger wire, Amp remain off. I have also tried reseatign the trigger cable. I will try testing the voltage and switching out the wire to see if it helps and will keep you posted. OK, good, then it probably is not the amp. Either the preamp is doing something strange, or the cable is bad. If you have another, preferably known-good, cable I would try that first as it is easy. One thing to watch is if some setting or something else could be causing the MC-700's trigger output to turn on. Cases I have run into in the past include things like CEC from the TV flipping on the processor, an unexpected pass-through setting that also enabled the trigger output of an AVR, and (most insidious) a remote code for a different device on my Harmony (universal remote) that managed to trigger on my AVR when I was not expecting it. Like, turn on the TV and VCR to watch a movie without the audio system, and having an amp turn on out of the blue. |
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