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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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Old 29th Sep 2023, 10:36 am   #1
Join Date: Feb 2009
Location: Chesterfield, Derbyshire, UK.
Posts: 3,760
Default Marantz 2030 popping noise one channel

This is a tuner/amp I sold a month or so ago ,on Facebook Marketplace , I have been using this on the radio for about five/six years or more every day ,sods law I sell it and it goes faulty ,the fault was popping/crackling Oh dear is it going to be the output stage , a quick test ie shorting the input to the output stage channel in question stopped the noise phew! that means the fault is further back ie the pre/amp there are four transistors in this stage per channel ,a quick blast with the hair dryer did alter the crackling a bit, so I ordered four transistors genuine Toshiba ones not cheap I didn't want to fit equivalent ones, the came pretty quick fitted the same day , I am pleased to say job done ,just to say all the transistors read ok , the transistors were 2x 2SA493 and 2x 2SC1000 , the customer was happy to pay for the parts no labour charge . Mick.
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