HandK stereo receiver repair

Sep 05, 2006 15 Replies

I just fired up my 330A Harmon Kardon stereo receiver. It's been sitting a while. It worked great at first but then all of the speakers on both channels starting sounding fuzzy like they were blown (it happened suddenly and I'm quite sure the speakers are fine). Is that a fuse issue? I remember changing a fuse before. Is there a reason they would blow frequently? If it's more complicated than a fuse I mean to take this opportunity to educate myself about electronics repair. I'm very mechanically handy but know nothing about circuits. What tools should I purchase? Is there a book or a site to get me going in the right direction? Thank you anyone for your time.


-David



I have the schematic if you need it.

Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida

Yes. I checked that out. I switched on the FM and AM and Phono with no change in the fuzziness. The unit had only been on for about a half hour. We turned it off for the nite. Then this morning we turned on the FM again and it's fine and been fine all day. So, the issue is intermittant. I also checked the 3 fuses on the back (Spkr. A / B / and AC) and they're all fine.

Thank you. I would appreciate that. Is it a PDF or something? Also, do you know where I could get a look at the manual? I saw a link to HK manuals, but the link didn't work.

-David

Also wanted to point out that I'm running 3 speakers at once. Two large Pioneers on one channel and then a single bookend Sony on the other channel and I'm running both channels simultaneously. Is that safe for the system?

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It includes the manual and parts list. I bought one of these new in 1973. ;-)

The manual will be there till I need the web space again.

Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida

The problem is more likely dirty controls / switches. Try manipulating them, turning the balance control, pushing the tape monitor buttons, etc whilr music is playing. You might well find the offender. Not so good running multiple speakers - but if you keep the volume levels lower, and the speaker wires are OK it shouldn't really be a problem.

Mark Z.

The other responses are far more likely but the 330A was known for the audio output transistors intermittently opening up which does sound fuzzy. Chuck

That sounds very interesting. It happened again once more after being on all day and then when shut off for a while it was fine again. I haven't tried the disconnecting of the speakers but I'm positive it's in all three as I have speakers A and B and I switched back and forth between them to no avail. The fuzziness was in all three to an equal extent.

-David

Have you downloaded the manual? I need to delete it from the website.

Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida

If you suspect the audio outputs, hitting them with freeze spray when the fuzzy sound commences should heal them temporarily. Chuck

Just did. Thanks very very much Michael. I really appreciate that. By the way what's that microphone looking thing on the back which is hardwired into the unit and can flip up to being a couple of inches out from the back of the unit?

-David

Not sure how to do that.. Freeze spray? Is that like the stuff we used to use for chewing gum removal?

-David

It sounds like the AM antenna.

Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida

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