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

From: Don Maslin <donm_at_cts.com>
Date: Thu Nov 20 18:37:04 2003

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
Received on Thu Nov 20 2003 - 18:37:04 GMT