FD400 drive troubleshooting

[Richard A. Cini]

That's interesting -- who?

The way that the service manual tells you to check the speed is the pulse
width on a specific test point on the PCB. I was just going to use a laser
tach on the spindle...but I have to get a tach first :-)


On 11/21/07 11:08 PM, "Grant Stockly" <grant at stockly.com> wrote:

> At 06:56 PM 11/21/2007, you wrote:
>> I thought about the speed. It's a direct-drive DC spindle motor, not belt
>> drive, in this model so I'll have to hunt around to see if there's a speed
>> control pot somewhere.
> 
> The peak to peak voltage from the heads will tell if its a head
> problem.  There are still places selling spare parts for those drives.
> 

Rich

--
Rich Cini
Collector of Classic Computers
Build Master and lead engineer, Altair32 Emulator
http://www.altair32.com
http://highgate.comm.sfu.ca/~rcini/classiccmp