Hi All,

I'd like some advice with regards to Bigfoot on my Whitewater. Recently it was working but after, say, half an hour, bigfoot's head would stop moving and you'd get an error. Usually after powering off and on it would reset the error but this was usually after it was powered off for, at least, a period of time.

As a bit of a background, recently I decided to fix a faulty switch on disaster drop which required me unplugging various plugs through the playfield to get to the switch as I needed to remove a ramp. When everything was plugged back in bigfoot's head just kept spinning continuously. After turning the game off and back on Bigfoot no longer worked. Tried manually moving the head by hand and it moved fine. Tried the head motor test and opto tests and no luck.... Got errors and no movement.

I've since plugged a 9v battery into the head motor and it spins fine. Whilst doing this I put it into switch test mode and both optos were triggered so I'm thinking the problem is with the controller board (A-15680).

I took the board off and it looked like the main capacitor (C2) had leaked (refer photos) so, based on other people's fixes I replaced it and also replaced the chip with a new LM399 but no luck... No spinning head.

The red led on the board comes on, input voltages on J1 seem fine but I get nothing on the output pins on J2.

I ~think~ I have checked the continuity on the various traces but I'm not really sure if I've missed something or even looking in the right places to be honest. Perhaps other resistors, capacitors or diodes are gone...at this point debating whether i should give up and get a replacement A-15680.

Any ideas?

Thanks

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Thanks, I did think of this but I don't have any of the other machines that use it and with current stay at home restrictions I'm limited in who I can bug to test mine in and vice versa.

Worst case I can buy a new one for around $100 Aud but I thought I'd try my luck fixing it if possible.

Bingo, you were spot on. It was the trace between +ve leg of C2 capacitor to the Q5 transistor. I jumpered a wire between those two points under the board and solved the problem.

I thought I had checked the continuity but obviously I needed another pair of eyes to see what I missed.

Thanks zaza