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Old 14th June 2006, 07:28 AM   #1
baria is offline baria  United States
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Default help with Harman Kardon 330A

I just found an old HK 330A in a garage sale and hooked it up to my speakers ( I tried both A & B speaker systems). As I turn the receiver dial, I see the levels responding in the dial on the left, but there's no sound from the speakers. I'm a total novice - what could be the problem? Any help with this amp much appreciated, since it looks and feels to be in good condition. Thanks.
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Old 14th June 2006, 01:19 PM   #2
anatech is offline anatech  Canada
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Hi baria,
Normally Harmon Kardon does not use a speaker relay system. Have a look at the rear panel for main in - pre out jacks. There should be a loop there for each channel. An RCA patch cord will work fine.

Also check that you do not have a tape monitor switch pushed in.

Let us know. I don't happen to have a diagram for it, so you may need one.

-Chris
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Old 14th June 2006, 05:31 PM   #3
baria is offline baria  United States
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Thanks Chris, I'll take another look and let you know. By the way, I meant that I had tried wiring the two speaker wires (left and ground, right and ground) first in speaker system A and then in speaker system B. The wires go straight from the speaker to the screws in the back panel. I made sure the screws were well tightened over bare wire.
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Old 14th June 2006, 05:33 PM   #4
anatech is offline anatech  Canada
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Hi baria,
The "A" and "B" sets go to the same amplifier circuits through a switch. I didn't expect there would be a difference between the two positions.

-Chris
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Old 14th June 2006, 07:15 PM   #5
baria is offline baria  United States
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Chris, thanks! I patched the main amp and pre-amp ins and outs and it works. Nice sound. Another question: I lose sound on and off in one or both speakers when I turn the volume knob. I've heard people talk about blowing air around the knob to clean the connections - do I need to take the front panel off to do that? If it's an usoveable problem, I can lve with it, but would like to fix it if possible.
Thanks again.
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Old 14th June 2006, 07:49 PM   #6
anatech is offline anatech  Canada
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Hi baria,
You need to use proper control cleaner. Not the stuff Radio Shack sells, or tuner cleaner.

De-Ox-Id, or Deoxid (different) are about the best. You only want to clean the metal slip ring. If you use a spray can, the smallest amount you can that clears the problem. More is not better!

You have to get behind the front panel. Take the top and / or bottom covers off to gain access. There is a slot on the bottom of the control for each channel. The terminals come out there.

-Chris
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