22 Nov
2007
22 Nov
'07
12:58 p.m.
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:
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
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.