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Success Stories If you have successfully repaired or restored a piece of equipment, why not write up what you did and post details here. Particularly if it was interesting, unusual or challenging. PLEASE DO NOT POST REQUESTS FOR HELP HERE! |
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9th Nov 2021, 10:41 pm | #1 |
Heptode
Join Date: Aug 2009
Location: Liverpool, Merseyside, UK.
Posts: 704
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Cambridge Audio Azur 640T tuner
Hi all,
Picked up a faulty Cambridge tuner with the fault description that it worked for anything between 5 minutes to half an hour then started acting up. Jumped straight into the PSU and found the 5v went haywire when the fault occured. I thought classic case of bad capacitors, how wrong I was…. After a few hours and replacing caps, diodes and regulators finally found out the polyfuse was warming up when passing current and tripping out, took a while but got there in the end! Possibly the gunk that was securing the capacitors had gone conductive and caused the failure? Will be interesting to see other’s views on this! All seems OK now, new polyfuse on order Cheers, Kev |