Sticking Flipper - Solved

[stoptap]

Hi Guys.

My Walking Dead has started to have a sticky right flipper. Flipper sticks up after a few plays. It isn’t locked solid. If I turn the power off the flipper drops so it certainly appears to be electrical.
Where is a good place to start looking ? Leaky transistor ? Failing diode ?

 

[new forest pinball]

Hi andy,
Start with the simple stuff first dude...
1). Flipper switch contacts are they dirty has the gap decreased between the leafs?
2). Clean the flipper mech has that got a bit grubby.....
3). Clean and check condition of coil sleeve and coil connections. Inc. diodes
4). Check coil plunger is clean and moving freely etc....
Then check transistors.......

 

[stoptap]

Howdy Keith.

The flippers are mechanically sound mate. They were rebuilt about six months ago so probably had a couple of hundred plays max since then.

Because the flipper falls when I switch the power off I am leaning heavily towards it being an electrical fault. I will have to get the test meter out and compare the readings across the coils, diodes and transistors of the two flippers.

 

[Poibug]

They are mosfets so meter readings may not tell you much.As said check switch contacts.If ok u could always shotgun it and change the mosfey,THINK irl540 are fine

 

[stoptap]

Sorted it. Sometime in the games past it has had some really ****ty soldering done on the power board. I cleaned it all up, replaced the Mosfet and diode while I had it out and all is good again.