Kenwood KA7100. Help

Shaun b

Member
Picked up a KA7100 week or so ago. It worked fine for a couple days. One morning I turned it on and it blew a fuse. I replaced it and it did it again. F3 fuse - 250v 4a. I was hoping someone smarter than me which is most of you, could advise me on where to start looking. I'm quite comfortable working inside the unit. Any help would be great. Thanks
 
shorted rectifier or a problem in main left amp section or other problem in power supply .
 
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for some dumb reason i was looking at fuse 4 . . yes of course fuse 3 is for left main amp . will edit my post .
should make it easier to find the fault being as there are 2 supplies .
 
Ha I thought I was wrong, so deleted my post. I had to go back and look. Agreed left side of the amp given the dual supply. Could be a short in left channel amp somewhere or possibly a bad rectifier at De19 or De23. That's where I'd start.
 
Thanks. Work closed today for the storm so I will spend some time this morning in the shop working on it.
 
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