Turtles flipper problem

[kevlar]

I've just been to a friends house who has a DE Turtles and a Huricane. The turtles left flipper was a bit flappy and easily pushed down. I haven't owned a DE machine but had a little look, surprised to find just a single coil with 2 lugs and no EOS. How do these things work without burning out? Anyway the left flipper maybe a little weak compared to the right but the main problem is you can just push it down extremely easily, the right is very difficult to push down in comparison. I didn't have a multimeter with me so left it there for now. Flipper buttons are micro switches.

Suggestions?

Thanks

Kev

 

[backbox]

The coil's momentarily fed with 50V DC (via a drive transistor) when the button is pressed.
A timer based around a nand gate and RC (looks to be about a second or so) then switches the 50V off and leaves 8V as a holding voltage.

On the 'solid state flipper' pcb there's a couple of leds. one for the left / one for the right. These should light when the 50V drive command is on. Unfortunately they're only the command, not the actual output so it doesn't check the transistor itself, but a good starting point.

Rob

 

[kevlar]

Thanks Rob, will look into that next time I'm there.

 

[cooldan]

turtles with a weak flipper?

sorry, i couldn't resist

 

[kevlar]

 

[Arv]

Re-wire the coil and solder the lugs back on.

 

[Moonraker]

The 'solid state flipper' pcb is normally found on the left hand side of the cabinet under the playfield. As previously stated check to see if the LEDs light when the flipper button is pressed. If it doesn't then look at the flipper switch (meter across the lugs).

If it does try reseating connectors on the PCB as a starter for 10.
Then check the fuse holders, they're normally very fragile and prone to breaking.

 

[kevlar]

Thanks for suggestions guys, will get back to the machine soon and have a poke about.