(Topic ID: 315319)

F14 Jet Bumper randomly tilts (With Video)

By RandyW

2 years ago


Topic Heartbeat

Topic Stats

  • 17 posts
  • 8 Pinsiders participating
  • Latest reply 2 years ago by barakandl
  • Topic is favorited by 1 Pinsider

You

Linked Games

Topic Gallery

View topic image gallery

pasted_image (resized).png
#1 2 years ago

I have been working on an F14 for a couple of weeks with a myriad of problems. I have it almost finished, but have one last issue I cannot trace down. The Jet Bumper will randomly trigger a tilt. When the pin came into my shop, it had a pop bumper switch stack with no diode, cap or resistor. Along with a butt load of shorts. I repaired the shorts, the board damage and fixed up the switch stack.

I have tested every switch on the game. They all work and each only registers their switch hit. I have tested pretty well every diode and found nothing. But here we sit... The Jet bumper triggers tilt at random intervals. You might go three games without an issue, or it may tilt every time the jet bumper is hit. For shits and giggles, I have clipped every one of the tilts from the harness. No change.

#2 2 years ago

Started taking video, trying to find the cause. But it just seems so random.

#3 2 years ago

Seems to me some resistor networks can cause the issue that are tied into the switch matrix. Does it give tilt warnings before tilting or just tilt? If it tilts with no warnings chances are its tied into the playfield tilt line.

#5 2 years ago

https://www.ipdb.org/files/804/Williams_1987_F_14_Tomcat_Service_Bulletin_41.pdf

See if this has been done. If not and the flashers work try making sure they are isolated from the Standups.

#6 2 years ago
Quoted from slochar:

https://www.ipdb.org/files/804/Williams_1987_F_14_Tomcat_Service_Bulletin_41.pdf
See if this has been done. If not and the flashers work try making sure they are isolated from the Standups.

Thank you, I will check this later today.

#7 2 years ago
Quoted from slochar:

https://www.ipdb.org/files/804/Williams_1987_F_14_Tomcat_Service_Bulletin_41.pdf
See if this has been done. If not and the flashers work try making sure they are isolated from the Standups.

This has all been completed already. I thought it had, but wasn't sure.

1 week later
#8 2 years ago

i had similar problem,i change src6 diode on main board,problem fix.

#9 2 years ago
Quoted from pinballfan:

i had similar problem,i change src6 diode on main board,problem fix.

Thanks, I will check and swap that, see if it does anything. At this point, I am open to anything, even an exorcist.

#10 2 years ago

I once had a similar issue with my Space Station. The pop wouldn't randomly tilt as I recall, but instead blow a fuse and/or trigger other matrix-linked effects in the game.

I eventually traced it to the pop switch stack's longest leaf just barely - and only occasionally - touching the pop yoke at the end of its travel. It took a long time to discover this, but once I did and corrected it, the issue never happened again.

https://pinside.com/pinball/forum/topic/space-station-sys-11-aux-power-meltdown-where-to-begin#post-3258003

#11 2 years ago

It may be a switch issue that only happens when one or more switches are closed and another switch (pop bumper) closes. Second video appears to show at least one ball locked when the tilt happens. In switch edges test, put a ball in each of the locks one at a time, then test the pop bumper switch. You're looking for switches not registering correctly, like the pop bumper triggering tilt or slam tilt switch.

Pin wiki is down at the moment, but I suspect there are instructions there on how to determine if a switch matrix issue is on the cpu board or playfield.

#12 2 years ago

A shorted switch diode can cause this. They dont usually short electrically, but may get bent so that diode lead touches a wrong switch solder lug. Check all playfield switches.

4 weeks later
#13 2 years ago

I never did find this. It has been driving me nuts.

#14 2 years ago

When I got f-14 it had multiple switch problems. The pull resistor network was bad and a diode was cracked on a flipper coil. The resistor network issue caused random tilts and the diode issue caused the ball locks to get emptied at random times.

I wonder why F-14 eats that resistor network on the MPU seemingly more often than other games. Pretty sure I have a memory of desoldering one that just crumbled apart after the solder was loosened.

#15 2 years ago
Quoted from barakandl:

When I got f-14 it had multiple switch problems. The pull resistor network was bad and a diode was cracked on a flipper coil. The resistor network issue caused random tilts and the diode issue caused the ball locks to get emptied at random times.
I wonder why F-14 eats that resistor network on the MPU seemingly more often than other games. Pretty sure I have a memory of desoldering one that just crumbled apart after the solder was loosened.

Someone has replaced the resistor network at some point, but I will check it all the same. Thank you.

#16 2 years ago
Quoted from barakandl:

When I got f-14 it had multiple switch problems. The pull resistor network was bad and a diode was cracked on a flipper coil. The resistor network issue caused random tilts and the diode issue caused the ball locks to get emptied at random times.
I wonder why F-14 eats that resistor network on the MPU seemingly more often than other games. Pretty sure I have a memory of desoldering one that just crumbled apart after the solder was loosened.

You were correct! The issue is confirmed to be a board issue and very likely the resistor array as you mentioned.

#17 2 years ago

https://lcsc.com/product-detail/Resistor-Networks-Arrays_CTS-Electronic-Components-770101472P_C1358139.html

generic part number is usually something like A10-472.

If you want to get hacky you might find only on resistor is bad, or the last two, etc... You can build a resistor network out of individual resistors. I've done it a few times to get a game going instead of waiting on a part. It can be done pretty neatly if you take your time.

pasted_image (resized).pngpasted_image (resized).png
Promoted items from Pinside Marketplace and Pinside Shops!
$ 170.00
Displays
Digipinball Shop
 
$ 2.50
Lighting - Led
Pinballrom
 
$ 65.00
Playfield - Toys/Add-ons
arcade-cabinets.com
 
$ 25.00
Playfield - Decals
Pinball Invasion
 
$ 35.00
Cabinet - Other
Rocket City Pinball
 
Wanted
Machine - Wanted
Fort Lauderdale, FL
$ 65.00
Boards
Pinball Haus
 
$ 15.00
Cabinet - Sound/Speakers
Gweem's Mods
 
$ 18.00
Electronics
Yorktown Arcade Supply
 
$ 36.95
Eproms
Pinballrom
 
$ 95.00
Cabinet - Sound/Speakers
Pinball Mod Co.
 
$ 12.50
Lighting - Led
RoyGBev Pinball
 
From: $ 100.00
Cabinet - Shooter Rods
Super Skill Shot Shop
 
2,400
Machine - For Sale
St. Louis, MO
$ 18.95
Eproms
Pinballrom
 
$ 1.00
Pinball Machine
Pinball Alley
 
$ 39.99
Eproms
Matt's Basement Arcade
 
$ 19.99
Eproms
Matt's Basement Arcade
 
$ 69.00
Gameroom - Decorations
Pinball Pimp
 
$ 5.00
Playfield - Decals
Metal-Mods
 

Reply

Wanna join the discussion? Please sign in to reply to this topic.

Hey there! Welcome to Pinside!

Donate to Pinside

Great to see you're enjoying Pinside! Did you know Pinside is able to run without any 3rd-party banners or ads, thanks to the support from our visitors? Please consider a donation to Pinside and get anext to your username to show for it! Or better yet, subscribe to Pinside+!


This page was printed from and we tried optimising it for printing. Some page elements may have been deliberately hidden.

Scan the QR code on the left to jump to the URL this document was printed from.