Re: Hitachi AXM82D CD/DAB/FM/Cassette.
Source: http://sci.techarchive.net/Archive/sci.electronics.repair/201003/msg00195.html
From: "ian field" <gangprobing.alien@xxxxxxxxxxxx> Date: Sat, 6 Mar 2010 14:38:14 0000
"William R. Walsh" <newsgroups1@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message news:wqedne8MFYHFAwzWnZ2dnUVZ_vCdnZ2d@xxxxxxxxxxxx Hi!
The bulged capacitor was guilty as charged (excuse the pun) the ESR was over 5 Ohms
I am not too surprised to hear this. It could well have been bad from day 1.
Looks like I caught the fan just in time!
That would surely be the next thing. I envisioned this set as a portable, but it must be something a bit bigger than that since it has a cooling fan. There's no excuse other than cheapness as to why these fans fail. (Seriously. I have computer fans that were made in 1987 and are still going strong.)
I'm surprised that there were no disturbances or hum on the audio as the capacitor went into it's death throes.
That seems like a pretty common outcome.the circuit works fine until one day the capacitor really gives it up. Somehow it struggles along, maybe due to reserves in the design? Sometimes other components fail when the capacitor stops working, but in this case, it sounds like the unit has been restored to perfect health. Re: Hitachi AXM82D CD/DAB/FM/Cassette. 1
Re: Hitachi AXM82D CD/DAB/FM/Cassette. William
It been going a few days now so fingers crossed. The cap I took out is marked "KSC", the top is bulged but the creases didn't split it tried to vent by pushing the rubber plug out the other end. The replacement came from stock I keep for repairing SMPSUs, so its high temp and ultra low ESR, I also upgraded the ceramic capacitor in parallel with it, its a 16V cap with less than 12V on it and doesn't seem to be particularly hard worked so I'm guessing it was a crap capacitor to start with. Almost certainly, I have a fan the right size in stock but CBA grafting the long connecting lead to it, so I hooked the old one up to 12V supply to run some PTFE lube into the bearing while I worked on the PSU.