Hi!
I've just built my BlueSCSI and connected it up to my SE. To my surprise, it won't power via the bus. I've got the jumpers on the two termination headers (it's the only drive) and I've checked my soldering job. All looks OK.
With termination enabled (jumpers in-place), there's no sign of life from the BlueSCSI board whatsoever. If I disable termination, the board's power LED illuminates, but of course, the machine doesn't detect the unterminated drive.
If I power the board via USB, it works perfectly.
Now, I've got a Molex > FDD adapter on the way, so I can power the board from the SE's hard drive power cable. But I'm interested in finding out why my Mac can't power the board via the bus.
The PSU and analog boards have been recapped. With the original 20MB HD fitted, I was measuring a solid 12.5V and 5.3V on the hard drive's Molex connector. So I *think* power's good.
Is it likely to be just 'one of those things'? Could perhaps a recap of the logic board help? Or maybe there's something on the BlueSCSI board I should check?
Any help appreciated!
Chris
I've just built my BlueSCSI and connected it up to my SE. To my surprise, it won't power via the bus. I've got the jumpers on the two termination headers (it's the only drive) and I've checked my soldering job. All looks OK.
With termination enabled (jumpers in-place), there's no sign of life from the BlueSCSI board whatsoever. If I disable termination, the board's power LED illuminates, but of course, the machine doesn't detect the unterminated drive.
If I power the board via USB, it works perfectly.
Now, I've got a Molex > FDD adapter on the way, so I can power the board from the SE's hard drive power cable. But I'm interested in finding out why my Mac can't power the board via the bus.
The PSU and analog boards have been recapped. With the original 20MB HD fitted, I was measuring a solid 12.5V and 5.3V on the hard drive's Molex connector. So I *think* power's good.
Is it likely to be just 'one of those things'? Could perhaps a recap of the logic board help? Or maybe there's something on the BlueSCSI board I should check?
Any help appreciated!
Chris