Quote:
Originally Posted by Boater Sam
I know nothing of the UA723C or the TL331 chips other than they are hard to source in dil package and that they seem so expensive that I may well be wasting my time trying to go any further with the repair,
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The 723 is available from Farnell for less than a pound! -
UA723C
As for the TL331C, it does seem surprisingly difficult to find (one on eBay for £5) , but is it actually deceased ? Have you checked to see if the output sawtooth is present ?
Cheers