(Topic ID: 70838)

Pinbot Fans and Owners Club!

By wayout440

10 years ago


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  • 6,055 posts
  • 462 Pinsiders participating
  • Latest reply 32 hours ago by RCA1
  • Topic is favorited by 233 Pinsiders

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#4320 3 years ago

Hey All! This machine is driving me batty. I replaced some solenoids and the machine played perfectly for about 4 hours, then the next time I turned it on it goes goofy. When you push the credit button it starts playing the in-game music but the rest of the machine is still in attract mode. No flippers, no ball in or anything. I thought that it was the RAM chip, but I swapped in a rottendog board from my high speed and it does the exact same thing. Power supply is original, so I’ll check voltages tonight. Just very odd. Can incorrect voltage cause the ROM chips to do weird things?

#4323 3 years ago
Quoted from Blackbeard:

Have the caps been changed out?

Not since I’ve owned it (about a year now). I’ll check voltages as you and Robotworkshop have suggested and report back. Thanks!

#4326 3 years ago
Quoted from MasterBlaster:

Hey All! This machine is driving me batty. I replaced some solenoids and the machine played perfectly for about 4 hours, then the next time I turned it on it goes goofy. When you push the credit button it starts playing the in-game music but the rest of the machine is still in attract mode. No flippers, no ball in or anything. I thought that it was the RAM chip, but I swapped in a rottendog board from my high speed and it does the exact same thing. Power supply is original, so I’ll check voltages tonight. Just very odd. Can incorrect voltage cause the ROM chips to do weird things?

So, I swapped over the rottendog power supply from my High Speed just to see if that might be the quick fix. Exact same behavior from the machine. So now it’s got a new power supply and a new MPU board...still same problems. ROM chips are still original, if that makes any difference at all...

#4328 3 years ago
Quoted from RichWolfson:

Look closely at the cables? Change them if you can, but if you have replacements to test with....
///Rich

Which cables are you referring to, the ones from the power supply to the MPU?

#4329 3 years ago
Quoted from Robotworkshop:

Incorrect voltage (low or high) can cause all sorts of things and is typically one of the first things you check. Otherwise you may be hunting for problems that don't exist.

Maybe I should also check/replace all the fuses...I haven’t done that yet.

#4331 3 years ago
Quoted from GRUMPY:

When you turn on the power switch, does the visor open and close? If yes run a switch test on the visor switches.

Yes, visor opens on power up. All switches seem to be registering during edge test. Switch test shows the appropriate switches activated. Have flippers during tests, nada when I push credit button to start game.

#4337 3 years ago
Quoted from GRUMPY:

Then you lost your freeplay setting. This can happen if the batteries went dead or were changed. This can also happen if there was a short that pulled the five volts down briefly, like a CPU reset or cracked header pin on the power cable. Drop a quarter in and try to start a game.

THANK YOU GRUMPY! I feel like a ninny, but that was in fact the issue. This machine has always been set on free play so I guess I never knew how it behaved when it is set up for taking coin.
Interesting side note, when I dropped in a quarter nothing happened...so I opened the door and realized that the coin mechs had been stripped out. I’ve opened that door a hundred times and never realized it!

Before I swap the old power supply back in this thing and return the new rottendog supply to my High Speed...I’d like an opinion on whether to put the original power supply in or swap in the original power supply from High Speed. The coating over the traces on the Pinbot supply are toast and the jumper wire seems like a bit of a hack. Several of the solder points are pretty sloppy too. I believe that I can just solder in the old Molex connector for the power, and everything else looks to be the same? Visually anyway, the HS power supply looks to be in much better condition so I just wanted to check and see if there are any red flags with making the change.

Here are photos for comparison, with the Pinbot supply being on the right.

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#4339 3 years ago
Quoted from GRUMPY:

Pics not the best but I can see that the HS supply has newer caps and a bridge rectifier. The Pinbot supply is original but is a system 9 power supply not a system 11. If it was me I would put HS back in HS and rebuild the system 9 supply and modify it to work in a system 11. Save the RD supply for a spare.

Ok sounds good. Thank you for the advice, as always!

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