tc5501p
Boss DR-55 capacitor change to allow use of TC4011B chips..
From a thread on electro-music forum: “The CD4011 is a bit fussy … a few years ago I repaired one of these machines with a […]
Boss Dr-55 memory chip replacement. (TC5501P)
This turned out to be remarkably easy! Step 1: de-solder the existing memory chip. This turned out to be an NEC equivalent of the Toshiba […]
Boss DR-55 memory chip replacement. TC5501P
I have now successfully replaced the memory chip with a new Toshiba TC5501P. I’ve installed it in a socket and it all works. Result! Full […]
Battery Clips & Testing | Defective tc5501p ?
I have replaced the battery clip with one that doesn’t have the pp3 clip on it, to save space. I unsoldered the old one, and […]