On Thu, Jan 5, 2012 at 4:44 PM, C. Turner wrote:
>
> On random things, on one of my units it had the section of the board
> populated with the +5V switching regulator - but it was not powered up: A
> bit of sleuthing around with an ohmmeter and with the help of the data
> sheet for the regulator
I, too, am one that cleverly managed to cook the '240 chip: Too many
clip leads in too small a space allowed the +15 to get into the lock
indicator pin while I was evaluating the unit. It, too, worked OK after
doing that.
Rather than order another 74ACT240 or even just an HC/T240, I rummaged
John,
You are not alone in this trip. Another member of this list tells me
that he connected the power to the lock indicator pin when he received
his unit and he was eager to test it. His 74ACT240 also got cooked but
the rest of the unit continued working normally.
Well, mine seems to have
I did something similar- momentary contact of +15V supply with one of the other
pins- might have been the +5 Vin, or another signal. The 75ACT240 became very
hot. I ordered a replacement 75ACT240 part, swapped it in, and the unit seems
to work fine now. Note this is the 0.3" wide device, DigiKe
