Analogue-sequencer

On Fri, 9 Apr 2004, Andy Wilson wrote:

> Still sounds like you've got a near short on the output of the regulator, i.e. something
> is pulling too much current. Have you tried powering up the board without the IDC
> connectors plugged in? Do that, then measure the regulator output. If it's still low,
> then you know it's a problem on the Main board and not with the ancillary boards or
> ribbons.

the last time i tried, the only thing plugged in was the PLED. but i'll
try it without as well. i'm pretty sure it's something on the main
board... the other boards seem very simple. the power goes to the voltage
regulator and just stops. i've scrutinized the solder joints on the
regulator and i can't find any shorts. also, it doesn't seem to matter
whether the reg. is screwed down to the pcb or not.

> If the result indicates that the main board is at fault, and you have soldered all the ICs
> in place; check your soldering very carefully. Look out for any solder bridges or
> splashes which may be making unwanted connections. If you have socketed your
> ICs, then remove them all, then power up the board, and measure the regulator
> output again. Check and recheck that *ALL* your ics are inserted the right way round.

everything worked fine at one point, then just stopped. i'm 100% sure of
the orientation of all ICs. i triple checked the sockets when i soldered
them in, and i triple checked the ICs before i inserted them and again
after.

what i fear is that when i was running it, somehow i fried something.
what, i don't know.

previously, i managed to get it to run by shorting the fuse through my
multimeter. i clipped the two leads onto the two ends of the fuse and
started messing with the keypad. after a while, everything just shut off.
i haven't been able to get anything out of it since. i *really* hope i
didn't toast the cpu.

>  A backwards IC could easily produce the symptoms you describe.

could a dead one? *shudder*

> Don't give up. It's well worth the effort.

oh i won't. despite these troubles, the P3 is the answer to many years of
pattern-based dreaming. :)

thanks a ton, everyone.

bleep.
out.

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