HP-41CX - Printable Version +- HP Forums (https://archived.hpcalc.org/museumforum) +-- Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum-1.html) +--- Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum-2.html) +--- Thread: HP-41CX (/thread-44634.html) |
HP-41CX - Gary - 10-19-2003 Hi,
Thanks
Re: HP-41CX - fred - 10-20-2003 Learn to calculate quickly?
Re: HP-41CX turning off quickly -- was discussed here recently - Paul Brogger - 10-20-2003 I'm no 41 expert, but I believe this has been discussed here recently. If I remember right, it's either bad contact between the keyboard and the cpu board, or it's a bad capacitor on the cpu board. But don't take my word for it. Search the Forum or the Archives -- I'm sure you'll find some recent discussion of this very problem.
Good Luck!
Re: HP-41CX turning off quickly -- was discussed here recently - David Brunell - 10-20-2003 I've made a habit, anytime I open a 41 for the first time, of replacing the two electrolytic capacitors with tantalum units. One is a 470 uF @ 6.3 V and the other is a 100 uF at 10 V. I believe the former holds the memory while changing batteries and the latter controls the shutoff time.
I had one 41CX that was eating batteries even while shut off, and it turned out to be a leaky 470 uF cap.
Re: HP-41CX turning off quickly -- was discussed here recently - Gary - 10-26-2003 Thanks David, |