4 Jan
2004
4 Jan
'04
1:47 a.m.
On Sat, 3 Jan 2004, Tony Duell wrote:
To my knowledge, these drives don't require -5V but, yes, I did check at
the logic board itself.
I'll take a deep breath and start poking through the circuit. Thanks for
the pointers!
Steve
The
"H" model is older and uses a square 6-pin Molex connector (same as
all my other 8-inch drives), so I'm sure the voltages are correct.
Has this drive ever worked in this system? If not, you might be missing
some voltage (like -5V) that's not needed by some drives. Have you
actually checked the PSU voltages at the drive with a voltmeter? Anyone have a
suggestion for troubleshooting?
Yes. Trace back from the motor to find how it's controlled (or if you
have a schematic, look there). Find out what signals are needed to turn
the motor on (e.g. a disk-inserted sensor) and find out which are
missing. Find out where the motor switching circuit gets its power from,
and make sure that's present and correct.