(Topic ID: 216258)

Dr. Dude magnet and flipper issue

By bk2futr

3 years ago


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  • 26 posts
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  • Latest reply 2 years ago by bk2futr
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#1 3 years ago

I just got this game a couple weeks ago and was supposed to be all gone over and now that I've been playing it a bit I have a few problems with it I can't figure out.
First one is the flippers...Every time the magnet is energized the flipper stays up until the magnet releases the ball. Could this be diodes put on backwards? I know the coils were changed...

As for the mixmaster ....it looks like it has dropped into the playfield ....it is down about 1/2 inch at least...I know it wasn't like that before today. I looked under the mixmaster from the bottom of the playfield but didn't see anything obvious.

Thanks in advance for any advice anyone can give...

#2 3 years ago
Quoted from bk2futr:

Could this be diodes put on backwards?

No. That would blow shit up.

LTG : )

#3 3 years ago
Quoted from bk2futr:

I looked under the mixmaster from the bottom of the playfield but didn't see anything obvious.

Manual page 2-29 #4, adjusting screw.

LTG : )

#4 3 years ago
Quoted from LTG:

No. That would blow shit up.
LTG : )

Any idea why the flippers would stay up when magnet is energized?

#5 3 years ago
Quoted from LTG:

Manual page 2-29 #4, adjusting screw.
LTG : )

I guess is could have come loose. I will check it! Thank you

#6 3 years ago

Got to Mixmaster fixed. The big plastic nut worked its way backwards but did not look loose when I looked at it yesterday but found that it did work its way backwards and therefore the table was down too low. Thanks for the help! Still looking for the issue with the flipper and magnet

#7 3 years ago
Quoted from bk2futr:

Got to Mixmaster fixed. The big plastic nut worked its way backwards but did not look loose when I looked at it yesterday but found that it did work its way backwards and therefore the table was down too low. Thanks for the help! Still looking for the issue with the flipper and magnet

is the flipper staying up when flipped?did did you check the eos switch and see if the contact blades are adjusted properly?

#8 3 years ago
Quoted from Cycloneman:

is the flipper staying up when flipped?did did you check the eos switch and see if the contact blades are adjusted properly?

Yes the flipper(s) will stay up if you push the Flipper button at the same time that the reflex magnet is energized . Then even if you leave go of the buttons The Flipper will stay in the up position as long as the energized magnet is on. When the energized magnet releases the ball it is at the same time the flippers will drop

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#9 3 years ago

ok,this sounds more of an electrical problem than mechinacal..Are there any dioides on that flipper coil?

#10 3 years ago
Quoted from Cycloneman:

ok,this sounds more of an electrical problem than mechinacal..Are there any dioides on that flipper coil?

I looked for them but don't think I saw any. I will take a picture when I get home. Thank you

#11 3 years ago

I'm wondering if something could have came loose in transport? He claimed it never did that for him. I did check connectors but didn't find anything that looked obvious yet..

#12 3 years ago
Quoted from bk2futr:

I looked for them but don't think I saw any. I will take a picture when I get home. Thank you

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#13 3 years ago

Diodes are there as you can see in these pics...

#14 3 years ago
Quoted from bk2futr:

Diodes are there as you can see in these pics...

yes there is and it is possible that one of those diodes is bad,you can test those diodes with a meter.but your first pic is showing a white wire way to close to the metal and your second pic is showing the middle lug of the coil a wire is off and going down into other wires.and you can see a wire was soldered on that middle lug,theres solder build up on the middle lug.

#15 3 years ago

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#16 3 years ago
Quoted from Cycloneman:

yes there is and it is possible that one of those diodes is bad,you can test those diodes with a meter.but your first pic is showing a white wire way to close to the metal and your second pic is showing the middle lug of the coil a wire is off and going down into other wires.and you can see a wire was soldered on that middle lug,theres solder build up on the middle lug.

Okay I took a few more pics I think it was the angle I took them that made things look off

#17 3 years ago

Here's a picture of the magnet

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#18 3 years ago

ok,yes thats a much better pic,everything looks correct in order.i would suspect one or more diodes on any of these 3 coils,the 2 flipper coils and the one coil for the magnet has to be bad/shorted.to test those diodes you would have to remove one leg of the diode and test with a meter set on diode setting.do you know to test them?

#19 3 years ago
Quoted from Cycloneman:

ok,yes thats a much better pic,everything looks correct in order.i would suspect one or more diodes on any of these 3 coils,the 2 flipper coils and the one coil for the magnet has to be bad/shorted.to test those diodes you would have to remove one leg of the diode and test with a meter set on diode setting.do you know to test them?

Yes..ill check them after work tomorrow and report back...Thank you

#20 3 years ago
Quoted from Cycloneman:

ok,yes thats a much better pic,everything looks correct in order.i would suspect one or more diodes on any of these 3 coils,the 2 flipper coils and the one coil for the magnet has to be bad/shorted.to test those diodes you would have to remove one leg of the diode and test with a meter set on diode setting.do you know to test them?

I do not see a diode on the magnet coil

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#21 3 years ago

ok,thats fine if theres no diodes on the magnet coil,but there are diodes on the flipper coils test those diodes.also look in the manual and see if the flippers,magnet are in the same row in the switch matrix chart

#22 3 years ago

For the (non flipper) coil diodes, iirc, they are on the driver board

#23 3 years ago
Quoted from gutz:

For the (non flipper) coil diodes, iirc, they are on the driver board

right,on Auxulliary board

3 months later
#24 3 years ago

Did you ever figure out the right flipper and magnet issue? I have the same exact thing happening to my Dr Dude. And sometimes the right flipper will do the same thing with the left flipper. The right flipper will stay up until the left flipper is released.

6 months later
#25 2 years ago

I know it's been a long time but I had a chance to check this game again. I actually had new capacitors ordered that are the right size for the flipper buttons that are supposed to be in there and I installed them today and it actually works now! So I am very happy to say that it is figured out finally. Someone must have installed those other ones for whatever reason and it was causing all the issues.

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#26 2 years ago

This is a picture of the ones I took out

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