Re: Disk ][ Drives not working

["Bill Garber" <willy46pa@comcast DOT net>]

"Bill Garber" <willy46pa@comcast DOT net> wrote in message
xKOdnVLo-pY-G3jdRVn_iw@comcast.com">news:xKOdnVLo-pY-G3jdRVn_iw@comcast.com...
:
: "John B. Matthews" <nospam@nospam.com> wrote in message
:
news:nospam-412BD7.11523702072004@news-server-fe-02.columbus.rr.c
: om...
: : In article <6c6dnRaHjfvu63jdRVn-tw@comcast.com>,
: :  "Bill Garber" <willy46pa@comcast DOT net> wrote:
: :
: : [...]
: :
: : > I too use DD disks in Disk II drives, no problem.
: : > Recently I had plugged a Disk II onto the card in the
: : > machine and got the first row of holes of the plug on
: : > the second row of pins as such:
: : >
: : >   |===================|  Card edge
: : >   |o o o o o o o o o o|  Row of pins
: : >   |HHHHHHHHHHHHHHHHHHH|  Plug on Pins
: : >   |HHHHHHHHHHHHHHHHHHH|  Plug not on pins
: : >
: : > After doing so and powering up and down again
: : > my Disk II responded as does the drive that is
: : > being described in this thread. It will seek
: : > track zero, but do no more. I suspect that the
: : > IC "ULN2003" is the culprit. I haven't had the
: : > opportunity to mess with it yet, but when I do
: : > I will post my results.
: :
: : This is an excellent picture of a well-known way to fry the
: : analog card inside the drive. I seem to recall folks saying
it
: : blew the "read sense amplifier" chip, luridly recounting how
it
: : would smoke and be visibly burned afterward. Is that the
: : "ULN2003" you mention?
:
: I'm not sure if that is the "read sense amp", but
: it is the chip most commonly known to go first when
: plugging it in that way. I'll see if I can find the FAQ
: and post the paragraph on that, or the link if it's too
: much to post.  :o)  Maybe someone with more time could
: help me out on this.  :o)

Here is the link to the Disk II misaligned connector
problem and fix. It's not much, but it's a start.

http://home.swbell.net/rubywand/Csa2FDRIVE.html#012

Bill @ GarberStreet Enterprizez };-)
Web Site - http://garberstreet.netfirms.com
Email - willy46pa @ comcast DOT net
Change DOT to a dot to contact me



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