[Coco] 2 wasted cpus?

[camillus Blockx]

I do have some, but I paid more for them then you paid at your source. I
sold a couple recently for 12 $ a piece, a lot more then you can buy them.
They came from china, and are actually the newer 63b09e cpu's from hitachi.
Pin compatible, faster and have better ( newer ) tecnologie usable under
os9.



cb


On Thu, Mar 7, 2013 at 4:30 PM, Luis Antoniosi (CoCoDemus) <
retrocanada76 at gmail.com> wrote:

> do you have any working CPU you could sell me ?
>
> On Thu, Mar 7, 2013 at 5:26 PM, Luis Antoniosi (CoCoDemus) <
> retrocanada76 at gmail.com> wrote:
>
> > It's soldered. But I think it might worth paying 5 bucks more for a third
> > cpu than take any chance to damage my coco3 :P but i will take other
> > supplier than jameco.
> >
> >
> > On Thu, Mar 7, 2013 at 5:20 PM, camillus Blockx <camillus.b.58 at gmail.com
> >wrote:
> >
> >> Good to hear you have a coco 3, now you can test your cpu's  in that
> coco,
> >> that is if the cpu is not soldered in place.
> >> If it is soldered in place there is still a way to test, rather awkward
> >> but
> >> doable.
> >>
> >> Attache an 1 kohm resistor ( brown black red ) on a piece of wire like
> >> this:
> >>
> >> ------------------------------|--------------------[
> >>     ]--------------------
> >> wire +- 12 inch               resistor lead      1 K Ohm R
> >> resistor
> >> lead
> >>
> >> Do this 2 x
> >>
> >> Take one of the cpu's you bought and bend carefully pin40 up, so it
> makes
> >> no contact withe lower cpu.
> >> Place the cpu on top of the cpu in the coco 3, and press it downso it
> sits
> >> snug into the socket together with the original cpu. Now solder one of
> the
> >> earlier made wire and resistor to an ground lever, ( + side of nearby
> >> capacitor) and attach the resistor side to pin 40 on the BOTTOM cpu.
> This
> >>  will HALT the bottom cpu so it will not effect the test)
> >>
> >> Now the other wire you connect to a nearby - side of a capacitor and the
> >> resistor side to the upper cpu pin 40,
> >>
> >> - from capacitor or supply
> >> -----------------------------------wire-----------------------res 1k
> >> ------------------- pin 40 cpu on bottom
> >> +from capacitor or supply
> >> -----------------------------------wire-----------------------res 1k
> >> ------------------- pin 40 cpu on upper
> >>
> >> Do not connect any pin directly to any supply connection ALWAYS use
> >> resistor ( at least 1Kohm )
> >>
> >> Apply power and see if you get a working image, try reset if not from
> the
> >> first try. Possible you need to press a bit on the upper cpu to make
> shure
> >> it makes good contact. If you have good screen cpu is OK, else needs
> more
> >> testing.
> >>
> >> After power down do the same with the second cpu
> >>
> >> Hope this makes sence to you
> >>
> >> Good luck
> >>
> >> If you decide to trow the board away,i will take it and pay for Shipping
> >>
> >> thnx
> >>
> >>
> >> On Thu, Mar 7, 2013 at 12:10 PM, Luis Antoniosi (CoCoDemus) <
> >> retrocanada76 at gmail.com> wrote:
> >>
> >> > i applied only to one side, it's is very difficult to put solder on
> top,
> >> > you can't reach with solder tip, and the socket's round metal legs
> >> covers
> >> > the solder points. I use a socket like these:
> >> >
> >> >
> >> >
> >>
> http://image.made-in-china.com/43f34j00uBeapAfrfwqm/IC-Socket-Machined-Pin-0110-.jpg
> >> >
> >> >
> >> > But I tested the traces from top and bottom and all seem to have
> >> continuity
> >> > until their components or vias.
> >> >
> >> > sending the board to you probably would cost more than buying anoter
> >> coco2
> >> > on ebay. I already have a coco3, I just want to fix my coco2b. Thanxs
> >> for
> >> > the help.
> >> >
> >> > Felipe.
> >> >
> >> >
> >> >
> >> > On Thu, Mar 7, 2013 at 12:58 PM, camillus Blockx <
> >> camillus.b.58 at gmail.com
> >> > >wrote:
> >> >
> >> > > The best way to know if your cpu's are busted is to put them in an
> >> other
> >> > > coco and test it.
> >> > >
> >> > > Also worth to mention is when you placed the machiened socket did
> you
> >> > > solder it on both sides?
> >> > > Go with a thin solderwire and add a little more solder tobottom and
> >> top
> >> > > side on the pins of the cpusocket.
> >> > > This makes sure that plated thrue holes are making goodcontact. Use
> >> also
> >> > a
> >> > > fine solderpoint for this.
> >> > >
> >> > > good luck
> >> > >
> >> > > ( I would like to help you, but I do not know if you live close to
> >> > Indiana,
> >> > > Valparaiso area )
> >> > > You can buy a coco 3 128k for $75+ S/H, so don't know if you want to
> >> send
> >> > > your board to me, I test and if damaged try to repair it, and send
> it
> >> > back
> >> > > to you. The cost would only be Shipping and parts, if needed.
> >> > >
> >> > > Just let me know ok
> >> > >
> >> > > camillus
> >> > >
> >> > >
> >> > >
> >> > > On Thu, Mar 7, 2013 at 2:32 AM, Arthur Flexser <flexser at fiu.edu>
> >> wrote:
> >> > >
> >> > > > It's also conceivable that you have a cold solder joint, depending
> >> on
> >> > > > how exactly you tested continuity.  (Another possibility is a
> >> cracked
> >> > > > or damaged trace on the motherboard.)  Try testing the continuity
> >> > > > between each pin and someplace the trace beneath it goes to.  If
> you
> >> > > > just tested continuity between the pin and the glob of solder
> >> beneath
> >> > > > it, a cold solder joint might not be detected.  A close
> examination
> >> > > > under a magnifying glass might turn up a problem more quickly.  So
> >> > > > might reheating all the connections to see if the problem goes
> away.
> >> > > >
> >> > > > Art
> >> > > >
> >> > > > On Thu, Mar 7, 2013 at 1:02 AM, Retro Canada <
> >> retrocanada76 at gmail.com>
> >> > > > wrote:
> >> > > > > just got my 2 mc68b09e cpus from jameco. removed the defective
> cpu
> >> > from
> >> > > > my coco2, installed a machined socket but when i test both cpus
> all
> >> i
> >> > get
> >> > > > is garbled screeen. with vdg checkerboard and at signs. the same
> if
> >> i
> >> > > > remove and turn it on without the cpu.
> >> > > > >
> >> > > > > i checked the continuity on all pins seems fine. cpu is
> receiving
> >> 5v
> >> > > and
> >> > > > making some heat.
> >> > > > >
> >> > > > > so did i get 2 busted  cpus?
> >> > > > >
> >> > > > > Sent from my iPhone
> >> > > > >
> >> > > > > --
> >> > > > > Coco mailing list
> >> > > > > Coco at maltedmedia.com
> >> > > > > http://five.pairlist.net/mailman/listinfo/coco
> >> > > >
> >> > > > --
> >> > > > Coco mailing list
> >> > > > Coco at maltedmedia.com
> >> > > > http://five.pairlist.net/mailman/listinfo/coco
> >> > > >
> >> > >
> >> > > --
> >> > > Coco mailing list
> >> > > Coco at maltedmedia.com
> >> > > http://five.pairlist.net/mailman/listinfo/coco
> >> > >
> >> >
> >> >
> >> >
> >> > --
> >> > Long live the CoCo
> >> >
> >> > --
> >> > Coco mailing list
> >> > Coco at maltedmedia.com
> >> > http://five.pairlist.net/mailman/listinfo/coco
> >> >
> >>
> >> --
> >> Coco mailing list
> >> Coco at maltedmedia.com
> >> http://five.pairlist.net/mailman/listinfo/coco
> >>
> >
> >
> >
> > --
> > Long live the CoCo
> >
>
>
>
> --
> Long live the CoCo
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco
>