I just bought a used Audiocontrol 6xs crossover. Upon opening it up to see what frequency modules were inside I noticed a burnt resistor next to the remote level control jack. R167 is burnt to a crisp and R148 next to it looks like it got warm as well. I haven’t pulled the board out yet to see where the traces go but I assume it is part of the remote level input. First does anyone happen to know the values of these or at least the burnt one? R148 is a 10k, the other is unknown. Does anyone know if they had problems with the remotes burning resistors on the board or maybe have a clue what might have happened here? Any help would be appreciated. Thank you much. Mike
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Awesome thank you very much. It’s a starting point and see what happens from there. I don’t plan on using the remote so as long as that’s what those are for I should be ok. I will replace them, it would be nice to know what exactly happened. I contacted the seller but of course it worked fine for him. Funny thing is the pins were bent pretty bad on the subwoofer module and one pin wasn’t even making contact with the socket. I know first hand they are easy to screw up and bend when your taking them out, the bent leg fell off when I removed the module. Maybe someone else may have an idea what happened. Thanks for the helpful information. Mike
Quick question at the end of the two resistors there’s a wire link with a white color on it, there’s actually a few on these boards. Is that all they are just jumpers with a protective shrink tube or something? Thanks very much for your time. Mike
Is there anything else that I should be looking for inside this unit? I have had and still have a couple audio control units that will not output sound when cold and them if I crank the volume it will warm up and play fine the rest of the ride. I think it’s one channel not the entire unit. It’s been a while. But yea I’m taking the boards out today and if there’s any common failures I’d tackle them now. Thank you. Mike
Is there anything else that I should be looking for inside this unit? I have had and still have a couple audio control units that will not output sound when cold and them if I crank the volume it will warm up and play fine the rest of the ride. I think it’s one channel not the entire unit. It’s been a while. But yea I’m taking the boards out today and if there’s any common failures I’d tackle them now. Thank you. Mike
These are pretty much solid pieces, most if not all the problems I encountered are operator errors:
-check the components around each PFM chip for broken solder or lead connections, whilst the chips are being removed/installed the operator unknowingly applies force to the surrounding components which in turn breaks the solder/lead/trace connections.
-broken connecting harness, unknowingly they pry the boards apart one too many and it breaks the connections to either the soldered connections or just as it enters from the ribbon into the PCB.
-broken RCA connectors and connections to PCB, again unknowingly too much force is applied to the connectors, either the tips of the RCAs are broken off and remains lodged inside the connectors or the connectors is broken internally or at the solder connection.
-check the components around each PFM chip for broken solder or lead connections, whilst the chips are being removed/installed the operator unknowingly applies force to the surrounding components which in turn breaks the solder/lead/trace connections.
-broken connecting harness, unknowingly they pry the boards apart one too many and it breaks the connections to either the soldered connections or just as it enters from the ribbon into the PCB.
-broken RCA connectors and connections to PCB, again unknowingly too much force is applied to the connectors, either the tips of the RCAs are broken off and remains lodged inside the connectors or the connectors is broken internally or at the solder connection.