Leaderboard
-
[[Template core/front/popular/memberRow is throwing an error. This theme may be out of date. Run the support tool in the AdminCP to restore the default theme.]]
[[Template core/front/popular/memberRow is throwing an error. This theme may be out of date. Run the support tool in the AdminCP to restore the default theme.]]
Popular Content
Showing content with the highest reputation on 06/15/25 in all areas
-
It is mainly the RESET but before we go down the rabbit hole it might be a good idea to swap it out. If you can scope the 4 outputs from this chip and they look OK then maybe all is well. Like all these things that are intermittent sometimes it's best just to swap out to be sure, at least it's another thing eliminated. The part number for the TVS is 1.5KE6.8A (RS 171-9442)2 points
-
I thought there should have been a pulse on 13?? I don't have my notes to hand to confirm and I'll be away for a couple of days but will check on my return. It's funny how it's stayed on though. It's doubtful if there would be any dry joints on that chip as MPS2 is pretty good in that respect.1 point
-
So since I done this the machine has stayed on without any nonsense, must have been on 3 hours plus1 point
-
Hmm, lots of head scratching going on this end. This has probably nothing to do with it but can you check the o/p from the 555 (3). It should measure between 500-660 Hz.1 point
-
The chip does but IC20 only uses 4 so it's pins 11, 12, 13 and 141 point
