[Coco] Broken CC3

[RJRTTY at aol.com]

In a message dated 9/12/2008 11:21:29 P.M. Eastern Daylight Time,  
georgeramsower at gmail.com writes:


>Well, DARN!



>I can't  figure it. I went through the switching power supply and can't find 

 

>anything that's causing the noise and ripple. I've changed several  suspect 

>caps.



>The ripple from the head stepper in the disk  drive is showing up on the 5V 

>line. I've buffered the 5V line with a  2200uf cap to the coco and the 

>problem persists. If I DIR 1, the coco  will give an I/O error(there is no 

>drive 1). If I DIR to the drive that  it does have, the coco crashes.

>I tried another drive and the results  were the same.

>If I don't put a disk in the drive, the motor won't spin.  This results in 

>head movement, but no motor, no crash on the coco.

 
George.. try another power supply if you can.   I had an  old
PC AT once that had a marginal power supply that couldn't handle
disk motor activation.........
 
Roy
 
 



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