...
The device came with original documentation, 6 pages which I scanned to PDF:
View file | ||
---|---|---|
|
Testing the drive
Connectors…
The drive has some special form MOLEX connectors. I could not find these, so I decided to 3D print them:
...
This should make it easier to power the thing..
Powering up the logic
I tested the drive by putting it on my lab PSU. After switching the power on the 24V rail dropped to 3V and took 2A, so I switched off immediately. There was a burning smell in the air although nothing seemed hot and I did not see the Magic Smoke.
I measured the resistance of the 24V rail to GND which was 0.2ohm, really too low. Then I noticed the plethora of tantalums… I switched on the PSU again and quickly took a picture with the thermal camera:
...
The hot spots corresponded to some of the tantalums. I decided to replace them all:
...
There was one 33uF 35V that I did not have, I replaced that with a low ESR electrolytic one. After that the 24V rail behaved.