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I've had a Harman Kardon 330B in a backup system for a while and it has worked well, but sounded a bit scratchy with dirty pots and so I figured last night I'd open it up and get to work with some cleanup. Anyway, after cleaning and letting it dry overnight, I hooked her up this morning and the sound is much better and the scratchiness is completely gone. So for that, I am quite pleased.
Unfortunately, now it seems the bulbs are burnt out. Not sure if I got some cleaner on them and that affected something or what, but I get the input indicator light and nothing else. Previously all the lights were working if a bit dim.
So, is this likely a bulb replacement thing or is it possible something just needs to dry out for another day or two? Should I just wait it out first or should I go ahead and open it back up and start replacing the bulbs? If so, does anyone know what kind of bulbs this thing takes or where to get them?
I'm woefully inexperienced at opening these things up (although starting to have more of an interest in the guts of this stuff lately) so any advice is appreciated and feel free to talk to me like I know nothing because I'm not too shy of that.
Follow Ups:
Hello, I have the same receiver with a similar problem. My stereo indicator light is out. I will try to wiggle wires while I deoxit and clean. But, if this does not work, did you ever find a supplier of vintage receiver bulbs for the 330 B.
Thanks, Scott
I can't help you specifically, but what you describe seems more likely to be a loose wire or socket or bad switch contact. Cold bulbs, especially low voltage one's, are very shock resistant so while it's possible, it's very unlikely that you caused an actual filament failure while cleaning things up.
I'd try wiggling and tapping things... But don't fry yourself.
Rick
...use the eraser end of a new pencil. Keeps potential of lethal shocks to a minimum!
Thanks guys. When I get a chance over the weekend, I'll try some old fashioned wiggling things around before I try to do anything else.
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