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Old 02-11-2018, 09:25 PM
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Zenith R450X clock radio

I think this is a 1980 model. I picked this one up because I've never seen one of these in the white cabinet before. One of the led segments isn't working. I put an arrow towards it in the picture, while it doesn't look that dim in the picture it really barely lights up at all. Is this likely a problem with the display itself (then I'll have to find another one to swap the display out of), or something else? I don't have schematics for anything this new.
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Old 02-11-2018, 10:04 PM
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I'd be inclined to think bad pull-up/current limiting resistor, but then again early LEDs had lower life expectancies, and if it has been running regularly all its life it may be approaching the life rating.
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Old 02-12-2018, 07:14 AM
zeno zeno is offline
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Some of the common R472 radios had a plug in clock IC
that gave trouble but I think this is the display.......

73 Zeno
LFOD !
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Old 02-12-2018, 07:46 AM
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I left it unplugged all night, just plugged it in again, and now it works. I'll leave it on and see if the problem comes back...
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