ACA trouble shooting help please !

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Orangenut

Member
Joined 2019
#1
Hello all,
I need some help in troubleshooting an issue with one of my two ACA v1.8.
It’s red power on led for the right side pulses in intensity with the music. It sounds ok but somethings amiss.
Any help would be appreciated !
Marsman57.
 
#2
Is this a new issue? Was the amplifier working properly previous to this issue?

What happens if you switch power supplies between the two amplifiers?

Measure the voltage at V+ to Ground on the amplifier board. Does the voltage change with the intensity of the music?
 
#3
Both amps were working fine for about a month then ones right power led started to pulse with the music. It sounds fine though. I’ll try swapping power supplies. And take voltage measurements. I’ll post the results.
Thanks !
 
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