Dec RL01 drive problem - test-drb@ccmp.vtda.org

5 May 1999

...
 	1. Drive starts to spin up, but it's obvious by
looking at the spindle of
the drive motor, that the motor never reaches full speed.
	2. After about 5 seconds, the drive slows some, and the heads attempt to
load. 
If the drive never reaches full speed, then the heads aren't supposed
to come out.  This indicates a problem with the servo control board
(the one near the spindle motor) perhaps.

...
 	3. The heads then chatter back and forth. They appear
to move in about .25
inches and then retract.
	4. This continues until I spin down the drive.

If I pull the pack out, and hold the switches closed manually, the motor
does reach full speed (although the heads never attempt to load). 
"Full speed reached" (and speed regulation in general) is controlled
by the little magnetic gap sensor you see near the hub spindle and the
notches in the RL01 cartridge's hub.

...
 If anyone has any suggestions as to what might be the
problem, I really
apprecite some information. 
After the simple mechanical checks others have suggested, I'd
recommend trying a replacement servo control board.

Tim.