Left flipper totally dead! (Bally Star Trek)

AE35

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Hey all!

My left flipper is dead. The leaf at the bottom is OK, the coil mechanic/coil and EOS
are also good. It has 43V etc.
All the connectors seem fine, I've just checked them while changing burned connectors.

Where could this fault be located? The leads seems fine...I'm totally lost:)

Thanks!!

Nicholas
 
i would say bad coil, is it burnt also there is a fine wire that comes off coil and goes to a lead.maybe its broken or not connected
 
Hey all!

My left flipper is dead. The leaf at the bottom is OK, the coil mechanic/coil and EOS
are also good. It has 43V etc.
All the connectors seem fine, I've just checked them while changing burned connectors.

Where could this fault be located? The leads seems fine...I'm totally lost:)

Thanks!!

Nicholas

How closely did you examine the leafs? They can get pretty pitted and carbonized. On old machines, they usually need to be filed clean and readjusted.

Edward
 
Well, I just cleaned the leaf switch down to the non-oxidized cobber..

Now the problem is intermittent...comes and go...suddenly the flipper won't fire for
a couple of secs, then it suddenly works again!!

What is up with this?:)
 
If it is intermittent it sounds like a cold solder joint. Check the solder at the switch, flipper, and on the board - both the transistor and the header pin(s).
 
Oh by the way, It just went dead again, and will make a ZTZTZTZTZTTZTZ sound during
some of the presses..

Thanks, I will check/resolder!
 
Check the connector solder joints on the solenoid driver board.

Check/file the flipper button switch in the cabinet.

Check/file the end of stroke switch on the flipper itself.

If all else fails, replace the flipper coil.
 
Check the connector solder joints on the solenoid driver board.

Check/file the flipper button switch in the cabinet.

Check/file the end of stroke switch on the flipper itself.

If all else fails, replace the flipper coil.

You can also check continuity through the coil windings and make sure you're getting a good ground out to the flippers through the flipper relay. I've seen pitted contacts inside the flipper relay cause this problem more than once. Remember that there are 2 sets of contacts inside the flipper relay so one side can stop working due to a bad flipper relay. I would manually apply ground to the coil and see if it energizes. If it does you know you have a problem on the ground side of the circuit. If not you might have an open coil winding or something.

In any case... I would definitely troubleshoot the problem until I was certain what was wrong before replacing any parts.
 
Ok guys!

I've filed down the button leaf and the EOS + resoldered the lugs. The game is running
now, and the flipper is working. I'll play it over the next few hours to see if it dies
again!!

Thanks!!
 
Hey guys!

I just wanted to round it up. Since filing down the EOS, I've had no problem with the
flipper at all. Thanks for your advice!!

Nicholas
 
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