>From SAMS Computerfacts for the 1571
DRIVE MOTOR NOT WORKING
(A) Check connector CN7 for good connections.
(B) Check for 12V at pin 2 of Connector CN7, if 12V is missing check power
supply.
(C) if 12V is present, connect a jumper from pin 3 of CN7 to ground. The
should start running. If motor does not start running, check Motor
Control Board. If motor does start running, check the main board.
In addition you should clean off all corrosion, and clean off any dirt on
the circuit boards and drive mechanism with isopropyl alcohol. Check that
the spindle motor spins freely with the power off.
On Sat, 14 Aug 1999, Geoff Oltmans wrote:
> Since we're on the subject of drive mechs, let me throw this problem on
> the list...
>
> I've got a sick 1571 mech. It's a newtronics mech, and SOMETIMES (not all
> the times) the spindle motor won't start up... on top of that, reading is
> very sporadic (probably I feel due to slightly varying spindle motor
> speeds). Anyone experience this problem before and know a fix for it?
>
> One thing I've noticed: This mech actually came out of a 128DCR. Around
> the floppy bay there is noticeable corrosion on the case. It's not
> horrible, but the floppy mech has some corrosion/rust on the metal bits. I
> suppose it could be that the electrolytic caps on the spindle motor board
> are contaminated or something.
>
> Later,
>
> *Geoff!*
>
>
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