(Topic ID: 254865)

Mm low power coils out


By aeneas

6 months ago



Topic Stats

  • 5 posts
  • 4 Pinsiders participating
  • Latest reply 6 months ago by hoby1
  • Topic is favorited by 1 Pinsider

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#1 6 months ago

Original mm, worked fine.

During playing suddenly the ball gets stuck in the merlin saucer.
Ok no problem I think, probably a wire came loose..

Now I do the solenoid check, all low power solenoids on fuse f102 are out.
No problem I think, bad fuse.

So I measure the fuse, it's ok..

Maybe the problem is further on the wire on j133-3 ?
Connector j133 - all 3 pins have 70vdc.
Weird.. so maybe the red wire broke further ?
I start measuring under the playfield, no broken wires, and all coils have 70vdc.

When I ground the purple wire of a coil that doesn't work (like merlin eject or pop bumpers) the coils work.. so the red wire or that fuse is not a problem?!

Now I am stuck. What can cause all coils on f102 not to work(in game or selftests), while there is power present ??
Asic / flatcables / .. ? The machine was working well, after being played half an hour this happened.

#2 6 months ago
Quoted from aeneas:

Asic / flatcables /

That would be the best start.
Machine 'OFF' and reseat the ribbon cable between cpu- and powerdriver-board.
Give the asic a gentle push into its socket.

#3 6 months ago

Removed the asic, put it back in, and everything works again.
Weird that it caused this issue..

#4 6 months ago

Good to know. That is an odd one.

#5 6 months ago
Quoted from aeneas:

Removed the asic, put it back in, and everything works again.
Weird that it caused this issue..

Quoted from aeneas:

Removed the asic, put it back in, and everything works again.
Weird that it caused this issue..

Well the pic does control flipper power. Kinda makes sense

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