Hi,

I am trying to solve all the issues on a lah that has stayed for long ... I do not know exactly, as it was in the seller's dining room.

There is a strange problem, the left flipper bat goes sometimes well when pressing the left button, sometimes not at all. The bat is not "hesitating", just nothing, it is like there is no trigger at all.

First of all, I do not know what type of voltage measure I get on the coil lugs. Surprisingly, I do not get 50 or 70vdc as for the WMS/Bally. But 6.5vdc on one lug when pressing the button, and 0 on the other lug. On both flipper bat coils. The right flipper works fine and shows the same voltages as the left one.

So, I always get the voltage going positive on the left coil lug when pressing the left button, whether it flips, or not (the issue), and I am not able to say why it does not flip each time the button is pressed.

Thanks for your help

Thanks, I ll have look

Hi,

There is one thing I would like to understand before checking all of this.

- when the button is pressed, I get 6.5vdc on one lug and 0 on the other. Is this measure normal ?
- for the left flipper, even when the left coil has no reaction although the button is pressed, the measures are 6.5 and 0.

My understanding is that there is a reaction every time the button is pressed, but sometimes the coil does not work.

Yes I read 6.5 and 0 on both left and right (the working one) coils

Hi,

Yes I have read this and have checked this.

Thanks forcyur time, I guess I will replace the components over the whole line.

I thought I had the solution: as there was voltage sent to the coil lug at every button pressing, it should be a coil problem. I resoldered the coil wires, same stuff after a while.
I replaced the coil with a spare one, no progress.

Coming back after I replaced the button switch. There is no change.

When I press the button, current comes to the coil, because the flipper bat trembles, or moves a few millimeters.

That happens from time to time

Hallo Bingovit, dank U voor het antwoord.

It is a good point, the fuse holder are not in good condition. Regarding the voltage, I have the same value on the right flipper coil lugs.

Fuse and holder are replaced. No more succes. I will resolder all the points on the board

Sharing some thoughts.

I have the exact same measures on the flipper board for flippers "A" and "B". There is some kind of little movements on the left flipper bat.

The EOS is normally closed. Say that the EOS has a contact problem, i.e. considered by the CPU or the flipper board as open. Will it try to send a holding voltage, which could explain some things ?

That was it !!!

Thank you all for the time you have spent