(Topic ID: 151916)

CFTBL - Flippers do not work


By minnesota13

3 years ago



Topic Stats

  • 13 posts
  • 6 Pinsiders participating
  • Latest reply 3 years ago by minnesota13
  • Topic is favorited by 3 Pinsiders

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#1 3 years ago

Flippers used to work.

Flipper optos not showing action under switch test.

Flipper coils do not fire under solenoid test.

Flipper coil lugs measure 70VDC.

Power to flipper opto boards measures 12VDC. (they are new)
Power to Fliptronic Rottendog board (new) measures 4.95VDC and 11.45VDC at J904

Flipper opto boards have been changed out - no change.
Fliptronic board has been changed out - no change.

Ribbon cable has been changed out.

What's next?

#2 3 years ago

Check the fuse first ?

#3 3 years ago

The fuse? there are multiple fuses associated with the flippers, some on the flipper board and others on the driver board. All are checked as OK.

#4 3 years ago

Checked out with multimeter ?
With the fuse pulled out of clip?

#5 3 years ago

Yes all of the fuses were checked out of the holders. Also the voltage readings would read somewhat less if a fuse
was faulty. Wariodolby there is a specific fuse you have in mind beyond the Fliptronic board fuses and those assoicated with the 12V and 5v DC supply please let me know.

Since the Fliptronic II board was changed out with another, the flipper boards were changed out, and the voltages all read within an operation range it would seem to isolate the problem to an interconnect problem.

I would like to think that the problem is not associated with the flipper switch circuit since the coils do not fire under solenoid test.

I assume, perhaps incorrectly, that the solenoid test for the flippers is only by CPU control signal via the ribbon cable, completely independent of the flipper switch circuitry. How about using my logic pulser to simulate this signal directly on the flipper board or use of the logic probe to detect the CPU signal. Any guidance or suggestions along this path?

#6 3 years ago

if you have had the playfield out check the ball eject (into the shooter lane) as the coil lugs and wiring can catch on the shooter rod and if broken can short onto different items - something to cross off the list

#7 3 years ago

Got a pic of the wiring to the coils?
Is there a chance the wires are connected to the wrong lugs? High power vs. low power coil.

#8 3 years ago

Thinking about a communication problem. Could be a problem with U1 / U3 on CPU-board.
Or bad contact on processor/asic with socket. Press U4 (6809) and U9 (asic) carefully in their socket.

#9 3 years ago
Quoted from minnesota13:

Flipper optos not showing action under switch test.

This is a deal-breaker.

If you open the coin door does it go CLANG-CLANG-CLANG-CLANG!!!!?

Any work done on the game recently?

How do your Driver Board LEDs look, compared to page 1-37 of the manual?

#10 3 years ago

Check the left cabinet switch for +12V. A gray/yellow wire in pin 6 of J1 on the left flipper button board.

Start a game. Use your logic probe. Probe J906 pin 2 on the fliptronic board. Press the Left flipper button. You should see the signal toggle.

Repeat test on J906 pin 1 using the Right flipper button.

Do both of those pins toggle with their respective flipper buttons being pressed?

[edit] This is a 12 volt circuit, so connect the logic probe to ground and the 12 volt test point on driver board.

#11 3 years ago

This machine has been recently fully restored. It was fully working but suffered from excessive mods on the 12V circuit at driver board J118. This caused stress on the 12V fuse circuit where the fuse was more than warm to the touch. This has been resolved by removing all mods from the 12V circuit.

Everything works, all solenoids, all switches, all controlled lamps, all flash lamps and sounds with the exception of the flippers. The flippers were working, but the machine has done some travelling folded up in a trailer and the flippers were
discovered as not working.

All driver board LEDs are on, and all driver board voltages measure good.

The coil wiring has been been double checked and all is good with the wiring.

We will first check the CPU chips -- I have had a ASIC problem before on a Fish Tales where
reel would not index, and pressing in the ASIC fixed the problem.

It will require two people to check the the Fliptronic board state changes with the flipper buttons so
there will be a slight delay before we can perform that test.

Thank you all for the suggestions.

#12 3 years ago

Chips on the CPU were checked, and pressed in with no improvement to the problem. It will be a couple of days before I can get to the machine and test with a logic probe.

#13 3 years ago

Problem has been resolved and I learned something too.

We started from the beginning this AM, starting with power measurements at the flipper board and the Fliptronic II board.

The root cause was bad IDC "connection" at a connector on the coin door board. The gray/yellow wire w/12V from the driver board was not making good contact with the gray/yellow wire that goes to the flipper boards. Fixed the 12V to flipper boards and the flippers worked again.

It was deceiving because earlier measurements showed 12VDC at the flipper boards -- both of them.
But today was a hard failure of the 12VDC to the flipper boards. Now all fixed.

I learned that without the flipper boards powered, the solenoid test will not fire the flipper solenoids.

Thanks all for the suggestions.

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