Hi all,
I wonder if someone might be able to point me in the right direction with steps to troubleshoot a HackerNAP please?
I built it some 10 years ago, and it was in daily use for probably the first 7 of those. Never had any problems with it. Then I moved, and took it out of my system. It has been on a shelf since.
Today I wanted to try it back in my system, so plugged it in, and got no sound. On closer inspection I find that one channel's speaker protection board is 'tripped' (more accurately, starts open circuit as normal, but never closes circuit.) The other channel works fine. But only when the problematic channel is not connected to a source.
Oddly, when I plug in the interconnect of the affected non-working channel, it trips the speaker protection board of the unaffected working channel, as well as remaining tripped on the affected channel.
I've measured voltages coming from the PSU boards, and all are normal, so I'm assuming something's died on the amp PCB itself. But I don't know how to work out what. And I don't understand why connecting the affected PCB to a source would cause the unaffected working channel's protection board to trip.
I only have rudimentary electronics understanding and built the HackerNAP by following the instructions closely and asking questions, so please assume no knowledge on my part!!
Many thanks in advance.
I wonder if someone might be able to point me in the right direction with steps to troubleshoot a HackerNAP please?
I built it some 10 years ago, and it was in daily use for probably the first 7 of those. Never had any problems with it. Then I moved, and took it out of my system. It has been on a shelf since.
Today I wanted to try it back in my system, so plugged it in, and got no sound. On closer inspection I find that one channel's speaker protection board is 'tripped' (more accurately, starts open circuit as normal, but never closes circuit.) The other channel works fine. But only when the problematic channel is not connected to a source.
Oddly, when I plug in the interconnect of the affected non-working channel, it trips the speaker protection board of the unaffected working channel, as well as remaining tripped on the affected channel.
I've measured voltages coming from the PSU boards, and all are normal, so I'm assuming something's died on the amp PCB itself. But I don't know how to work out what. And I don't understand why connecting the affected PCB to a source would cause the unaffected working channel's protection board to trip.
I only have rudimentary electronics understanding and built the HackerNAP by following the instructions closely and asking questions, so please assume no knowledge on my part!!
Many thanks in advance.