(Topic ID: 156490)

Excalibur drop targets not resetting - System 80b


By Vongoosewink

4 years ago



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  • 11 posts
  • 3 Pinsiders participating
  • Latest reply 1 year ago by Ralphman
  • Topic is favorited by 1 Pinsider

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#1 4 years ago

Hey guys, Hoping someone can help me troubleshoot an error I'm having with my Premier "Excalibur", a System 80b game.

We moved the machine yesterday, and today none of the drop target banks are resetting (it has 5 total banks) the drops are down and stay down. I entered the test menu and ran the tests, the solenoids for them don't fire - but the flippers, pop bumper, kickers, knocker are all OK. Also tested all the fuses on the power brick, and the 5 under the playfield, all OK. Tried reseating all the connectors to the boards and under the playfield, no change. Anyone have any advice on what may be causing this?

Thanks in advance for any help.

#2 4 years ago

Try this...report back.
Place the game in coil test.
Balls out.
PF vertical.
Meter on DC volts, or 200DC.
Black on transformer assembly metal case where grounds attach.
Red on either lug of coils that aren't firing.
What DC power do you read?
--
Chris Hibler - CARGPB #31
http://ChrisHblerPinball.com/contact/
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to g for Pinball Repair Info

#3 4 years ago
Quoted from ChrisHibler:

Try this...report back.
Place the game in coil test.
Balls out.
PF vertical.
Meter on DC volts, or 200DC.
Black on transformer assembly metal case where grounds attach.
Red on either lug of coils that aren't firing.
What DC power do you read?
--
Chris Hibler - CARGPB #31
http://ChrisHblerPinball.com/contact/
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to g for Pinball Repair Info

Hi Chris, thanks so much for trying to help. You saved one of my other Premier games a few years ago!

OK, so back to Excalibur - I ran the solenoid test, with the meter set to DC 200, black lead on the metal transformer case and red on one of the drop target solenoid wire-connectors. When it ran through the that particular one, the meter showed a tiny bit of activity, but negligible, all only the .1-.3 range, then nothing.

I tested the gameplay too - the game seemed to start correctly (flippers and pop bumper working, just no drop targets) but after a few targets hit, the game started repeating the target/sound/score over and over, repeatedly playing the sound and adding to the score. I turned it off at this point.

Thanks again for any advice you have.

-Fitz

#4 4 years ago

Happy to help.

Hmmm. The issue you added sounds a bit more serious.

One more power test.
Same setup.
Test one of the known working coils to ensure we are testing correctly.

--
Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

#5 4 years ago
Quoted from ChrisHibler:

Happy to help.
Hmmm. The issue you added sounds a bit more serious.
One more power test.
Same setup.
Test one of the known working coils to ensure we are testing correctly.
--
Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

Testing the knocker coil reads a steady 25v or so. Does that sound right?

#6 4 years ago
Quoted from Vongoosewink:

Testing the knocker coil reads a steady 25v or so. Does that sound right?

Yes. That's correct. That coil is nominally 24VDC.
Without schematics, I can't offer a guess. The "Playboard controlled Solenoids" page of the manual is what we need, and I don't have the Excalibur manual.
--
Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

#7 4 years ago

Scanned a page from my manual here, is this the correct page? Had to split it in 2, as it did not all fit on the scanner.

Thanks!

ex2_(resized).jpg

ex1_(resized).jpg

#8 4 years ago

All of the drops are fused by F13, a 2 amp slo-blo fuse.
Remove that fuse. It's under the PF.
Buzz it with your meter for continuity.

I bet you will find it blown.
--
Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info

#9 4 years ago

OK, I pulled and tested all 3 of the fuses there, and they all are still good. I also tested continuity from the fuse to one of the solenoids not firing, and it was good.

Another thing I found: Looking around under the playfield, I spotted a disconnected wire. Looks like someone replaced the pop-bumper and cut the 2 wires leading through the pop up into the light inside. When they reconnected it, they did not reconnect it to the original wires on the harness - both are still there, cleanly cut (maybe they could not see them, or they were too small? I don't know why.) Anyway one side (purple/yellow/yellow - that's like 744 on the schematic) now has a jumper running over to another light connector. The other side (the ground side, I think - red/green/green - that's line 255) has a long jumper wire hanging loose, with a bit of solder on the end - so it looks like this end has broken loose from wherever they connected it. This broken line could not have caused the drops all to fail, could it? Or could it have shorted something when it came loose?

I think I should just remove the long jumpers they added and reconnect both wires to their correct cut ends (the wire color codes match). Any reason not to?

Thanks again for the advice. I can take pictures or video if required.

#10 4 years ago

Under the same conditions, test for power on both sides of fuse F13.

Those wires aren't the problem. They may have contributed to a short that blew a fuse but they aren't in circuit with the coils.

Work your way back through the circuit, testing for power in the same way until you find the discontinuity.

Make sense?
--
Chris Hibler - CARGPB #31
http://ChrisHiblerPinball.com/contact/
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

2 years later
#11 1 year ago

Vongoosewink,

Was wondering if you ever resolved these issues? I recently bought a Sys 80b Hollywood Heat that came with some drop target issues, not sure if they are the same as yours though.

My drop targets all start up at beginning of each game, and with each new ball reset again... however, they do not reset after each panel of 3 is knocked down as they are supposed to. Is this the same problem you have or do yours never set up in the first place?

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