Sunn SX8350 PA Repair

DSC_9366Graphic EQ knobs broken off...Graphic EQ knobs broken off…Cause of the issues.. Reverb tank floating inside the cab... rubbers perishedCause of the issues.. Reverb tank floating inside the cab… rubbers perishedDSC_9293Power amp working fine!Power amp working fine!Reverb tank reattached and fuses do not blow but preamp pulling down the low voltage supply....Reverb tank reattached and fuses do not blow but preamp pulling down the low voltage supply….Has 19 dual op amps... and some had failed and one track turned to vapour..Has 19 dual op amps… and some had failed and one track turned to vapour..Track burned now bipassedTrack burned now bipassedNeeded to take all the knobs off and take the board out and check the op amps... took ages but found two dead ones...Needed to take all the knobs off and take the board out and check the op amps… took ages but found two dead ones…Finally the supply stays up and she is working again.. no fun working on this one!Finally the supply stays up and she is working again.. no fun working on this one!All good to go! Sounds great!All good to go! Sounds great! PA in blowing fuses… turns out the Reverb tank floating around inside caused all the damage… took a while to work out which op amps were destroyed but the power amp was fine. All good now.. no fun working on her but well engineered.

Leave a Reply

Your email address will not be published. Required fields are marked *

* Copy This Password *

* Type Or Paste Password Here *