power connection for 8" drive -- tandon tm848-01

From: Fred Cisin <cisin_at_xenosoft.com>
Date: Thu Nov 20 19:37:35 2003

IIRC, the Tandon TM848 has different power requirements and connectors
than the Shugart SA8xx drives. When I replaced one of my Shugarts with a
Tandon, I had to get a different connector, and supply at least one
different voltage.

There are a couple of cubic yards of stuff on top of my 8" drives, so I
can't check it now.

I think that I have the manuals for both Tandon 848 and Shugart 801; and I
think that I knbow where they are! Unfortunately, it's across town, on
one of the other campuses, and I won't be going there for a few weeks.

--
Grumpy Ol' Fred     		cisin_at_xenosoft.com
On Thu, 20 Nov 2003, Don Maslin wrote:
>
> On Wed, 19 Nov 2003, Jim Battle wrote:
>
> > Jim Battle wrote:
> >
> > ...
> > > After an hour of googling, I am unable to find what power to feed it.
> > > The connector on the back is two 3-pin molex connectors and looks like
> > > this:
> > >
> > >           +-------+
> > >           | X X X |
> > >           +-------+
> > >           | X   X |
> > >           +-------+
> >
> > Duh, I turned on my brain and buzzed out the connector to the PC board.
> >   If I number the connectors like this
> >
> >             +-------+
> >             | 1 2 3 |
> >             +-------+
> >             | 4   5 |
> >             +-------+
> >
> > Then 2, 4, 5 = GND, 3 = +5V regulated, 1 is > +12V unregulated.
> >
> > That is, pin 1 goes to a 7812 regulator, pin 3 goes directly to +5 on
> > the digital logic, and the other three are grounds.
> >
> > I've gotten so used to quickly finding things with google I forgot some
> > of the old fashioned techniques -- like figuring it out myself.
> >
>
> Jim, what make/model of 8" drive are you using?  The most usual DC
> power connection to one looks like the 'sketch' below.  The AC
> power to the motor is a separate connector.
>
>              POWER CONNECTOR FOR 8" DRIVE
>
>                  DC Power Connector
>             view looking at rear of drive
>
>                      ____   ____
>                     | o  |_|  o |
>                     | 2   _   1 |
>                     | o  | |  o |
>                     | 4  | |  3 |
>                     | o  | |  o |
>                     |_6__| |__5_|
>
>
>              Pin    Volts           Amperes
>               1      +24             1.7 max
>               2      +24 Return
>               3       -5 Return
>               4       -5             0.07 max
>               5       +5             1.0 max
>               6       +5 Return
>
> 						- don
>
>
>
>
>
>
--
Fred Cisin                      cisin_at_xenosoft.com
XenoSoft                        http://www.xenosoft.com
PO Box 1236                     (510) 558-9366
Berkeley, CA 94701-1236

Received on Thu Nov 20 2003 - 19:37:35 GMT