[sdiy] Odd question about Lexicon 224xl

Ken Stone sasami at hotkey.net.au
Wed Apr 20 07:38:14 CEST 2005


Replacing the Tantulums is always a step in the right direction. Use low ESR
electros if you can. Old tants are a common source of failure.

A quick "test" for misbehaving chips is to feel the temperature they are
running at. If one is unusually hot, it may be in a state of partial or
complete failure.

If any capacitor is part of a reset circuit, replace it.

Ken

>The board has eight 4.7uF and two 22uF tantalums spread around between 
>+5V and ground.  I put a meter on it while it was out of the mainframe 
>and found that between +V and Ground I'm only reading about 170 ohms of 
>resistance.  This seems awfully low to me.  Perhaps a leaky tantalum 
>that's not completely shorted out?  Or is this possibly correct?
_______________________________________________________________________
Ken Stone   sasami at hotkey.net.au or sasami at cgs.synth.net
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>




More information about the Synth-diy mailing list