(Topic ID: 285720)

Fathom lagoon and cave trap star rollover switches not registering


By solarvalue

14 days ago



Topic Stats

  • 15 posts
  • 7 Pinsiders participating
  • Latest reply 13 days ago by solarvalue
  • Topic is favorited by 1 Pinsider

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#1 14 days ago

Hi all,

I have an issue with my Fathom. The star rollover switches near the cave and lagoon traps are not registering. I have cleaned them and they are gapped correctly. I have continuity between the two tabs when I close the switch. Can't see any loose wires. What other tests can I do to narrow the problem down?

Thanks

#2 14 days ago

I remember when I had mine having similar issues, couldn't get multiball started. On mine it ended up being a problem with a small board under the playfield near the left front side.

#3 14 days ago

Multiball starts ok, the saucers are registering fine, it's just the star rollovers in front of the saucers. I think they just award points and a sound.

#4 14 days ago

Is it only those two switches out? I ask as I had this on a Evel Knevel , owner said 3 switches not working , when it was eight not working . Turns out the molex pin had fallen apart in the housing.

#5 14 days ago

Star rollovers on Bally need switch caps on them, make sure they're there and not one side clipped. If they're gone, add them. They lengthen short switch pulses so the mpu can see them and react accordingly.

https://www.greatplainselectronics.com/proddetail.asp?prod=CCD-0.047uF-100V

Also, if the gold plating is gone on either switch contact, it's just not going to be reliable.

#6 13 days ago
Quoted from chad:

Is it only those two switches out?

Yes, just those two switches out.

Quoted from slochar:

Star rollovers on Bally need switch caps on them, make sure they're there and not one side clipped.

The caps are there. Could the caps be the problem? The switches don't register even if I hold them closed.

Quoted from slochar:

Also, if the gold plating is gone on either switch contact, it's just not going to be reliable.

The gold plating is good.

#7 13 days ago

Those two switches are daisy chained together & then to the 6 blue/green targets on the left side.

The white wire with a yellow band connects from MPU-J2 pin 4 to the lagoon saucer, cave saucer & then to the targets.

First I would check for a physical break in the white/yellow cave wiring near the playfield edge - these wires get caught & damaged on the edge of the playfield when you raise/lower the playfield. Follow the two white/yellow wires from the lug till it clears & goes into the loom. On my game these exact white/yellow wires have had the insulation scraped through from this.

Assuming the 6 drop targets are registering individually (not just the bank resetting) then it's not a MPU-J2 pin 4 connection problem, check continuity between the white/yellow common wire on the targets to the lagoon/cave white/yellow connection & also continuity between both lagoon & cave trap to MPU-J2 pin 4.

Check their are two white/yellow wires connected to one lug on both the cave & lagoon switch.

#8 13 days ago

Thanks will check and report back.

#9 13 days ago

I don’t believe they are meant to award points or make a sound. I believe they are there to tell the mpu when the ball has cleared the saucer so the drop targets can reset.

#10 13 days ago
Quoted from MrArt2u:

I don’t believe they are meant to award points or make a sound. I believe they are there to tell the mpu when the ball has cleared the saucer so the drop targets can reset.

That’s not their purpose at least according to my game, if I bypass the rollover & lock a ball, the targets reset as normal.

Those two rollovers have a very specific function that is not always known about.

They come into play when you have a two or three multiball occurring & one of the balls lands in either the cave or lagoon saucer. At that point the targets for that saucer do not reset (they do not reset during mulitball) now this rollover target is ready to be actioned - when you roll the ball over the rollover towards the locked ball you get a speech call “help me” in essence the locked ball (the mermaid) is asking for help to be released.

This is my favourite speech call in the game - I always go for the locked ball in multiball to get the rollover & speech call.

#11 13 days ago
Quoted from Joydivision:

They come into play when you have a two or three multiball occurring & one of the balls lands in either the cave or lagoon saucer.

Ah, ok, this is my problem. I thought that they were active all the time. Just tested in multiball and they function as they should. Easy fix! Thanks for your help.

#12 13 days ago
Quoted from solarvalue:

Ah, ok, this is my problem. I thought that they were active all the time. Just tested in multiball and they function as they should. Easy fix! Thanks for your help.

I just realised you may not have know about how they work so they appear to not work, when they actually do - I should of thought of this first. I think a lot of people must think they relate to the the ball locking in & out the saucer as MrArt2u suggested. I probably did as well when I first got mine years ago & may have discovered it by accident with a shot to a locked ball.

Glad it's sorted. That's a nice Fathom you have, assuming it's the same one you had for sale - probably one of the best originals I have seen for sale in OZ & was a reasonable asking price too.

#13 13 days ago

Rollovers also score 50k, when “activated”.
2x in MB is 100k a shot, not bad, but no lit spinner.

#14 13 days ago
Quoted from DNO:

Rollovers also score 50k, when “activated”.
2x in MB is 100k a shot, not bad, but no lit spinner.

I never noticed the 50k score going with the speech call - That is well worth going for to get 100k.

With the 50k indicated next to the rollover & not scoring it with the rollover in general play probably added to people thinking the switch is not working or thought it was related to the saucer.

#15 13 days ago
Quoted from Joydivision:

Glad it's sorted. That's a nice Fathom you have, assuming it's the same one you had for sale - probably one of the best originals I have seen for sale in OZ & was a reasonable asking price too.

Thanks, yes, just making sure everything is 100% for the new owner.

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