(Topic ID: 270160)

Sys 11C no power to playfield

By bobnatlanta

3 years ago



Topic Stats

  • 7 posts
  • 3 Pinsiders participating
  • Latest reply 3 years ago by adalogue
  • Topic is favorited by 1 Pinsider

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#1 3 years ago

Here’s what I know: I shopped out this Riverboat Gambler for a friend about 3 years ago, everything was working. I got a text message the other day indicating that the owners grandchild was playing the game unsupervised, and ‘may have held the flipper buttons in interminably. All I know is it quit working.’ I powered the game up. It boots fine and some lights are working. It also served a ball, but nothing else on the PF is working, including flippers. F4 is blown, all other fuses tested good out of circuit. It looks like R95 smoked, possibly other components. Not sure where to start on this, no real Sys 11 experience other than the shop job. Appreciate any thoughts!!

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2 weeks later
#3 3 years ago

Replaced 3 smoked coils, couple of TIP102s and associated 2N4401s. Now the top pop bumper locks on at power up. I’m thinking of replacing 7402 IC.
All fuses proper value on ADB, and tested good out of circuit, other than F4, which I replaced.
Any other thoughts?

1 month later
#6 3 years ago

Resolved. Replaced 7402.

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