reyes61012 Messages: 14 Registered: April 2012 Location: clinton MD
Junior Member
Salvaged a Kustom Amp (K200 maybe) from jumk. brought it home, removed from the piggyback cabinet, the vinyl wrap was a mess, and cleaned the chassis. When I plug the unit, there was a hiss and crackling sound. The volume was very low. I hooked up a microphone, samething - low volume.
I got DC 40V +/-. No 8V +/-; intead I got 25V on the 8V line.
I checked the circuit using PC 703 schematic found in this site. What puzzled me is Q711(FZ952) supposed to be an NPN. What is in the unit checked as PNP using a digital multimeter. Is this a misprint or a production error? Is there any service bulletin regarding this aspect?
I will start to unsolder components to check in depth but I would rather hear from expert techs who are familiar with Kustom Amps. This is the first time I saw this Brand and I am impressed at the layout of the components
Can anybody help? Will apprecdiate deeply any suggestions or tips or guidance.