Any ideas? Blew fuse 114 and 115

IMG_20200724_190102 (resized).jpg

Was putting the claw back together. Ive been working on the optos.

Unhooked all of the column and row pins from the CPU...still nothing. Nothing works. Machine fires and just pops balls out.

I'm getting the same message for two different wires now. Row 2 green/red

I unhooked 2 pins from the CPU and turned the machine on. I cant get to the test mode.Of course nothing worked. Everything else fired OK

Any ideas?

If I plug them back into the CPU the error messages still come up

I can't get to test mode with the rows unplugged

Unsure. When the connectors are unplugged I can't get into test mode.

When pins are disconnected machine turns on and runs as normal. Cycles through high scores etc.

Just put the claw and motor back together. Pin 4 which is the column row was a little burnt on the board and wasnt making a good connection. Cleaned it up as much as i could. Again this is how the cryo-board looked before.

So now with the pins connected back into the CPU I cant get back into test mode.

IMG_20200723_103327 (resized).jpg

IMG_20200723_103346 (resized).jpg

Yes. I turned the machine and both fuses blew. I replaced them and got the error messages. Which opto board are you referring to?

CPU.

IMG_20200726_235155 (resized).jpg

IMG_20200726_235200 (resized).jpg

Opto board

IMG_20200726_235208 (resized).jpg

IMG_20200726_235213 (resized).jpg

What is pin 9 to pin 10? Nothing is labeled on my CPU. Thanks a bunch.

176.6

Would that cause the ground short message?

Like t said before I hooked up the cryoclaw board then turned the game on. Maybe something was touching? Either way the board is removed. I will order a replacement board. Thanks. Gotta find that part now.

My communication is awful. If that first quote came across as snarkey that was def not intentional.

Didnt mean replacement board meant U20. On marco and on Pinball life both say u20 is common cause of Ground Row Short https://www.pinballlife.com/williamsbally-uln2803a-switch-matrix-driver-chip.html

I havent messed with anything else except the cryoclaw which has to be completely disassembled each time I mess with it. I assume something touched. Either u20 is a couple bucks. Shipping will cost more. Thanks for the help!

Great point. I am the first to admit i dont know much about the boards. Hopefully thats the first and only thing to blow.

There is no C1...

IMG_20200727_221133 (resized).jpg

Replaced U20 and 100%. Fixed!! Thanks for the help!