Any idea what causes the pin breakage described below?
George
=========================================================
George L. Rachor Jr. george_at_racsys.rt.rain.com
Beaverton, Oregon
http://racsys.rt.rain.com
United States of America Amateur Radio : KD7DCX
On Tue, 19 Oct 1999, Doug Coward wrote:
> > ------------------------------
> >
> > Date: Mon, 18 Oct 1999 14:41:47 -0400
> "Bill Sudbrink" <bill_at_chipware.com> said:
> > I've hunted around on the web to no avail...
> > Can anybody give me the specs on these?
>
> According to my Tandon OEM Operating and Service Manual
> for the TM100-1 and TM100-2:
>
> Tracks per inch 48 TPI both drives
> Tracks per drive TM100-1 40 tracks, TM100-2 80 tracks
> Disk Rotational Speed 300 RPM +/- 1.5%
> Motor Start Time 250 milliseconds
> Motor Stop Time 150 milliseconds
> Seek Time,track to track 5 milliseconds
> Head Settling Time 15 milliseconds
> Ave Track Access Time 75 milliseconds
> Typ. Recording Modes FM,MFM,MMFM
> Data Transfer Rate 250,000 bits per second
> Unformated Cap. TM100-1 250Kb per disk, TM100-2 500Kb per disk
>
> Bill,
> Let me know if you need a copy of this. Thanks again for the C4P boot
> disks. The C4P-MF is coming along nicely. The power supply checks out
> and I'm pulling every socketed chip and reseating it during the
> cleaning.
> So far, I've found 5 chips with pins broken down inside the sockets.
> Fortunately, I was able to remove the pins from the sockets.
> Now I just need to pick-up some replacement 8T26 bus driver/receivers
> and then check all of those 2114s on the two 527 Ram boards and I'll
> be ready to fire this thing up. :)
> --Doug
> ====================================================
> Doug Coward dcoward_at_pressstart.com (work)
> Sr. Software Eng. mranalog_at_home.com (home)
> Press Start Inc. http://www.pressstart.com
> Sunnyvale,CA
>
> Curator
> Analog Computer Museum and History Center
> http://www.best.com/~dcoward/analog
> ====================================================
>
Received on Tue Oct 19 1999 - 11:53:58 BST