Dr. Dude Magnet coil causes flippers to hang up

Did you ever figure this out? I have one doing the same thing!

#3 5 years ago

CLY

Cycloneman

Inactive member

Detroit, MI

8y 36,150 649

Quoted from bk2futr:
Did you ever figure this out? I have one doing the same thing!</blockquote

it would have to be the wiring or there is a bad,faulty dioide.i would first start looking into the diodes on the flipper coils.

Did you ever figure this out? I have one doing the same thing!

did yours just start doing that or you bought it like that ect?

2 weeks later

#4 5 years ago

???

bk2futr

Pinside member

I tried removing the capicitors on both flippers and the flippers still worked but then the magnet quit working all together

#5 5 years ago

???

bk2futr

Pinside member

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1 week later

#6 5 years ago

???

bk2futr

Pinside member

Quoted from Cycloneman:
did yours just start doing that or you bought it like that ect?

I bougt it like this I think. I got it home and noticed right away. Previous owner said he didn't do it when he had it. I didn't try the game at his place.

#7 5 years ago

DEC

GRUMPY

Pinside member

The yellow \purple wire is not correct. That is something that was wrong before you got it.

1 year later

#8 4 years ago

EAS

EStroh

Pinside+ Frequent

Santa Clarita, CA

7y 86,800 632 26

I have a Dr Dude and it's doing the same thing? Did anyone find the problem?

#9 4 years ago

DEC

GRUMPY

Pinside member

https://pinside.com/pinball/forum/topic/dr-dude-mixmaster-and-flipper-issue

Quoted from EStroh:
I have a Dr Dude and it's doing the same thing? Did anyone find the problem?

Are your flippers wired incorrectly? Left flipper should have Orn/Vio and Blu/Vio wires. Not Yel/Vio

#10 4 years ago

EPI

ElkhartPinball

Pinside member

Elkhart, IN

12y 29,400 69

bk2futr has figured it out.
It was the capacitors on the flipper button switches they were to big (factory installed), here is his link to how he figured it out.
I had another Dr. Dude last year with the same problem, I found his link, changed the capacitors to what Williams was using on earlier System 11's flipper switches and the problem disappeared, don't know why Williams went to the larger capacitors for this game, but they do cause the flippers to hang up when the magnet is energized.

By the way Thank You bk2futr for posting your all your findings, when you called me on this problem last year, i couldn't remember what i did, whether it was fixed or not, (it was 5 years ago and a lot of games reconditioned after) but I talked with the customer who had the game and he said it still hangs up, next time I have a service call, it will be fixed.

#11 4 years ago

DEC

GRUMPY

Pinside member

It wasn't the cap size, it was the 50 volt yellow/violet wire that was wrong. True the caps weren't correct either but wouldn't cause this issue.

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#12 4 years ago

EAS

EStroh

Pinside+ Frequent

Santa Clarita, CA

7y 86,800 632 26

Quoted from GRUMPY:
It wasn't the cap size, it was the 50 volt yellow/violet wire that was wrong. True the caps weren't correct either but wouldn't cause this issue.[quoted image][quoted image]

Thanks for all the good information! I won't be able to look at the game until next weekend, but I DO know that the large yellow caps on are both flipper buttons on my pin. In the posts from bk2futr he has the Orange/Violet wires on both his before and after pics. He claimed that changing the cap to the small blue one solved his problem so I guess I'll try that first (and also verify my flipper switches are't wired Yellow/Violet). bk2futr claimed that he installed the caps used on earlier System 11 games - can someone tell me what this part number might be?

THANKS FOR ALL THE HELP!

#13 4 years ago

DEC

GRUMPY

Pinside member