Requesting Technical Assistance


Hello, 

I am bummed out. Yesterday I smoked the left channel on my vintage Fisher MC-4022 receiver. This is more sentimental than anything else. My late father gave this to me on my birthday back in 1978. How it happened, I was cleaning my garage and the speaker wire came disconnected from the speaker and shorted out the channel.  What do I do to fix this?

 

128x128joeradio

I ordered a Sanyo IC LA4250 from eBay. Replaced it and all channels are now working normally. Thanks for all the support. 

Update? Also, don't know where you are, but any electronic repair place can take care of this. There's hope. 

The left channel is blown/no sound on both A & B. There are no fuses from what I can see. I attempted to attach photos but cannot. How do you attach a photo? And is there a free schematic and users manual online. I cannot find either. Thanks. 

You may have just popped a fuse, assuming the Fisher employs them in a location where the hot & ground speaker wires touching would do so. Check for a fuse, and if that's the culprit just replace it.

@joeradio Have you tried both the A and B speaker outputs? There are 4 amplifiers in this unit, so you may have only damaged one. Ensure you select the A or B set from the from control.