Blown driver board components in Kaiju build

[Keith S]

Hi,
I have completed my driver boards and I am getting 487vDC at IA and 297vDC at OA which I think are in spec? However, when measuring one of the boards I accidentally shorted OA and IA and got two loud cracks and sparks. Just prior to the short the readings I got were the same as the other board at 487v and 297v.
Now the two LEDs on the B side of the shorted board don't light up and the measurement at IA is 477vDC. I also don't get any measurement at position 32 which should read 175vDC. What am I likely to have damaged on the board and can I order some replacement parts?
Thanks,
Keith.

 

[Paul Birkeland]

Yes, those were in spec. What is the OA voltage? This can also be probed at Breg on the B side.

Realistically, you'll likely want to start over with a fresh C4S board and fresh parts for it, as well as five new zener diodes and a fresh 5 lug strip to replace those parts under the board, but we can take a few measurements to sort that out a little more specifically before you request the parts.

 

[Keith S]

Thanks Paul.
OA reads 0 volts.
The 90.9 resistor still shows the correct value.

 

[Paul Birkeland]

I'd replace the board/board components/zener diodes on the 5 lug strip/5 lug strip.

 

[Keith S]

I'd replace the board/board components/zener diodes on the 5 lug strip/5 lug strip.

Thanks for the prompt attention Paul. I have sent an email to request the required parts.
Thanks,
Keith.