Flipper Issue has me stumped -- Solved

Ok so im working on a 76 Space Odyssey.
I put in new flipper coils and a new EOS on the left side.
Both flipper coils are wired the same and Ive double checked they are wired correctly.

The right Flipper works as expected.

The Left Flipper fires but then when the EOS switch opens the coil goes dead.
The EOS switch then closes (because the coil goes dead) and then fires again.
This creates a flutter situation.

Ive resoldered the wires to be double sure theres a good connection

The only thing i can think is that the low voltage circuit in the coil is bad.

Any ideas?

Thanks,
--Jeff

EDIT SOLUTION -- bad coil

DSCF2072.JPG

#2 11 years ago

CJM

EM-PINMAN

Pinside member

Hey Jeff,

Maybe the Low side of the Left Flipper Coil is internally bad. You could always switch coils form the right side and try it on the left. If it then works then time for a new coil.

Ken

#3 11 years ago

WRD

way2wyrd

Yeah thats next on my list.... what a pain in the ass.
I wonder if they will send me a replacement coil if it is bad..

--Jeff

#4 11 years ago

JFM

APOLLO_13

Inactive member

12y 56,650 1,665 8 11

just an observation, how many wires are on each post on the right and left... looks like the right coil has a wire to each post... the left looks like it's missing the middle post wire.

#5 11 years ago

CJM

EM-PINMAN

Pinside member

OP
Quoted from way2wyrd:
what a pain in the ass.

Yea I know what you mean as it is time consuming. I generally keep some extra coils on hand myself but Have no extra Flipper coils whatsoever so I would have to do the same thing you are doing.

Hang in there buddy.

Ken

#6 11 years ago

CJM

EM-PINMAN

Pinside member

Quoted from APOLLO_13:
the left looks like it's missing the middle post wire.

Looks that way to me to and there should be a wire there.

Ken.

#7 11 years ago

DMB

Dumb_Luck

Inactive member

Arlington, TX

12y 13,650 27 6

Quoted from APOLLO_13:
just an observation, how many wires are on each post on the right and left... looks like the right coil has a wire to each post... the left looks like it's missing the middle post wire.

Where is the "before" pic? Have you thought about putting the old one back before you unsolder the right one?

Sorry, this sucks!

#8 11 years ago

MLF

stashyboy

Pinside member

High Falls, NY

11y 91,050 2,643 14 44

Definitely check your wiring before taking the other one off. I had a problem like that and found the wire from the coil wasn't making contact with the terminal on the outside.

#9 11 years ago

WRD

way2wyrd

Nah left has all wires. center going to EOS is there and in strong.

2 wires left lug 1 going to EOS
1 wire middle going to EOS
2 wires right lug

i dug around and found an original flipper coil so ill swap that one in and see what happens

--Jeff

#10 11 years ago

WRD

way2wyrd

OK so it was a bad coil. Ill email tomorrow and see if they will send me another.

Back to the topside

--Jeff

IMAG0104.jpg

#11 11 years ago

JFM

APOLLO_13

Inactive member

12y 56,650 1,665 8 11

good deal... glad you got it

#12 11 years ago

SteveFury

Pinside member

Atlanta, GA

11y 75,650 1,496 3

If it's wired correctly the hold-in low current portion of the flipper coil is bad (open). You can test it for an open with an ohm meter.

When the flipper EOS switch is closed it shorts out (bypasses) the low current portion of the coil. When the EOS switch opens current flows through both sections of the coil.

Flipper.jpg

#13 11 years ago

SteveFury

Pinside member

Atlanta, GA

11y 75,650 1,496 3

Glad you got it. That's a pretty PF by the way.

#14 11 years ago

CJM

EM-PINMAN

Pinside member

OP
Quoted from way2wyrd:
OK so it was a bad coil. Ill email tomorrow and see if they will send me another.

Back to the topside

Glad you solved it.

Once you get it going it's a real fun and fast game.

Ken

#15 11 years ago

WRD

way2wyrd

Quoted from SteveFury:
That's a pretty PF by the way.

Thanks Steve. Ill post some before pics in another thread when its done. It was a complete mess but shined up real nice. The only part im annoyed by is the flipper wear but i may go after that after its completely working and together.

--Jeff

#16 11 years ago

►♠◄

Pin-it

Inactive member

Sunbury, PA

11y 64,900 7,217

OP
Quoted from way2wyrd:
OK so it was a bad coil.

Its a shame that the coil is Made in the USA could see if it was China ,that I could see.

Good that you found the problem with it, W2W ,jeff good luck on the rest of it.

#17 11 years ago

WRD

way2wyrd