Hi Clockmeister, This power source has a pigtail for powering the C64 works fine doesn't blow it's fuse Just when powering up the C128. This is helpful enough to find what regulator I need. Terry On May 28, 2017 6:06 PM, "Clockmeister" <clockmeister@internode.on.net> wrote: > > > On 29/05/2017 7:50 AM, Terry Raymond wrote: > >> Hi >> Im needing to check all Caps on my C128 >> to check these would I read the caps in OHM's readings? >> >> Im going to desolder them one at a time just to know what ones are failing >> and if the >> Electrolytic is leaking out or the CAP has a bulge on the top. >> > > If you are going to the trouble of desoldering them, just replace them but > do so with quality caps. > > This C128 is blowing the fuse in the power source, and this power source >> has been built from scratch from Ray Carlsen in the U.S.A. I trust Ray's >> work so it must be something on the >> C128's MB circuit. >> > > I trust Ray's work too, but that is not to say something hasn't failed in > the supply. Does the fuse blow as soon as you power up the C128? > If there is a dead short in Ray's supply I would suggest that the supply > fuse will blow even if the C128 isn't turned on. > > I was also told isnt there a power regulator component that has 3 solder >> legs that could possibly >> cause power problems, Should this regulator read 12VDC? What legs do I >> probe when I read the voltages on this regulator? >> >> >> > If it's a 78xx Voltage regulator then see here: > https://www.engineersgarage.com/electronic-components/7805- > voltage-regulator-ic > > Pin 1 is input voltage, 2 is ground and 3 will be the regulated output > voltage which should match the last two digits after the 78 part number. IE > 7805 = 5V, 7812 = 12V. > > > > Message was sent through the cbm-hackers mailing list > Message was sent through the cbm-hackers mailing listReceived on 2017-05-30 15:00:02
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