(Topic ID: 191277)

Meteor display issues

By spandol

4 years ago


Topic Heartbeat

Topic Stats

  • 29 posts
  • 10 Pinsiders participating
  • Latest reply 4 years ago by spandol
  • Topic is favorited by 2 Pinsiders

You

Linked Games

  • Meteor Stern Electronics, 1979
#1 4 years ago

I need a little guidance on an issue I'm having with Meteor. The player 3 and 4 displays don't work properly. In test, they work fine though. The issue I don't understand is player 3 is missing the last digit at times, but the game isn't working correctly when player 3 is up. I had all the meteor targets down and they wouldn't reset, but would correctly reset for the other players. Also, when the game is done, the high score on the 4th player display is different than the first three. The game has an Alltek MPU and LED board as well as a Rottendog rectifier board. Where should I be looking for issues?

Thanks.

#2 4 years ago

bump

#3 4 years ago

have you ever swapped displays around with other displays in the game? if you unplug display 3 and play player 3, do the drops reset?

#4 4 years ago
Quoted from silver_spinner:

have you ever swapped displays around with other displays in the game? if you unplug display 3 and play player 3, do the drops reset?

No, I'll give that a try. I thought the displays were ok and maybe it's with the MPU since the game is acting strange on player 3. Would the displays have anything to do with this?

#5 4 years ago

Try swapping your solenoid driver board from another bally and see if the problem goes away.

#6 4 years ago

i know if there is a bad display connected it can make other displays have issues.

Quoted from spandol:

No, I'll give that a try. I thought the displays were ok and maybe it's with the MPU since the game is acting strange on player 3. Would the displays have anything to do with this?

#7 4 years ago
Quoted from silver_spinner:

i know if there is a bad display connected it can make other displays have issues.

Thanks for the info. Both 3&4 are acting strange. When I get time, I'll do some troubleshooting and switch solenoid boards and displays.

#8 4 years ago

Edit -
I have no clue how I made this post on this thread. Either my browser got jacked up, or I was drunk.

Sorry everyone.

#9 4 years ago

Do you know if female connectors have been repined on this game? I agree with recommendations to swap displays. Look at back of the display boards, a solder bridge between the pins of J1 can cause issues.

#10 4 years ago
Quoted from JT-Pinball:

Do you know if female connectors have been repined on this game? I agree with recommendations to swap displays. Look at back of the display boards, a solder bridge between the pins of J1 can cause issues.

Thanks for the info. I'll check everything out and report back when I have time. Appreciate the help!

3 weeks later
#11 4 years ago

Ok, so, I've solved one of the issues. Switching solenoid driver board solved the drop target issue for player 3. The only issue now is player 3s display. In self test, all of the digits light the way they are suppose to.

If I start a 3 player game, player 3 always has a '5' as the last digit at the beginning of ball one, last digit being the 1s place. Once it's player 2's turn, player 3's last digit goes out. It's out until player 3 plays their ball for awhile, then works as it should. This happens each time it comes to player 2. If I turn on the game, all displays show the high score correctly. Is it losing power somewhere? If anyone can let me know what to check, I'd appreciate it.

#12 4 years ago
Quoted from spandol:

Ok, so, I've solved one of the issues. Switching solenoid driver board solved the drop target issue for player 3. The only issue now is player 3s display. In self test, all of the digits light the way they are suppose to.
If I start a 3 player game, player 3 always has a '5' as the last digit at the beginning of ball one, last digit being the 1s place. Once it's player 2's turn, player 3's last digit goes out. It's out until player 3 plays their ball for awhile, then works as it should. This happens each time it comes to player 2. If I turn on the game, all displays show the high score correctly. Is it losing power somewhere? If anyone can let me know what to check, I'd appreciate it.

First guess would be cracked header pin on the offending displays 1's digit strobe. Can you move the display to a different spot to see if the problem moves with the display or stays at the player 3 position?

While you have the display out, put your peepers on the display board's connector header pin solder joints. They crack really bad being a single sided PCB and the harness flexing when the door swings open.

#13 4 years ago
Quoted from barakandl:

First guess would be cracked header pin on the offending displays 1's digit strobe. Can you move the display to a different spot to see if the problem moves with the display or stays at the player 3 position?
While you have the display out, put your peepers on the display board's connector header pin solder joints. They crack really bad being a single sided PCB and the harness flexing when the door swings open.

I put in a brand new pin score display and it still occurs so it's not that.

#14 4 years ago

Bump

#15 4 years ago

Here's some key points to help so someone doesn't have to read everything.

1) new displays (pinscore), MPU, light board and solenoid board, all Alltek
2) player 3 display works correctly in self test
3) new game player 3 - 1's digit show '5' and not '0'
4) player 3s '1' digit goes out completely when player 2 starts, comes back on showing correct digit after player 3 plays for a short time

Same thing happens every time. Any help would be appreciated! Thanks!

#16 4 years ago

Honestly, I would try a different MPU.

#17 4 years ago
Quoted from Coyote:

Honestly, I would try a different MPU.

Ok, thanks. I have one I can switch it with

#18 4 years ago
Quoted from spandol:

Ok, thanks. I have one I can switch it with

Thought was that it seems too random to be off the board (i.e. Wiring issue..) - at least switching out boards will rule it out.

#19 4 years ago
Quoted from Coyote:

Thought was that it seems too random to be off the board (i.e. Wiring issue..) - at least switching out boards will rule it out.

I switched with another Alltek MPU and the same issue occurs. I don't have an original MPU I'm afraid. It's not intermittent either, happens every time. Player 3 always begins the game with 5 points, which changes to blank until player 3 hits around 8500, then the display is correct. Odd. So, I guess everything is ruled out except for wiring and/or power rectifier board. Unless there's an odd glitch with the Alltek game chip and Meteor. Can someone with a Meteor and an Alltek board put in a 3 player game and see if player 3 works correctly?

#20 4 years ago

Spandol, I have a Meteor on route with an Alltek MPU. No problems with the displays at all. It sounds like wiring problem on the display chain. Try reseating the display connectors on all displays and see if anything happens differently.

#21 4 years ago
Quoted from Enaud:

Spandol, I have a Meteor on route with an Alltek MPU. No problems with the displays at all. It sounds like wiring problem on the display chain. Try reseating the display connectors on all displays and see if anything happens differently.

Thanks enaud, I've reseated the connectors, but maybe I'll try reseating the wires into the connectors. Or maybe that's what you meant.

#22 4 years ago

I would get schematic and verify pin by pin each wire in all display connectors and J1 on MPU.

#23 4 years ago
Quoted from spandol:

Thanks enaud, I've reseated the connectors, but maybe I'll try reseating the wires into the connectors. Or maybe that's what you meant.

This is a VERY common Bally/Stern display problem. It is actually caused by one bad display affecting how the other displays show digits. You will need to unplug each display one at a time to determine which one is causing the issue. In other words, the display showing wrong data is not necessarily the faulty display.

#24 4 years ago
Quoted from snyper2099:

This is a VERY common Bally/Stern display problem. It is actually caused by one bad display affecting how the other displays show digits. You will need to unplug each display one at a time to determine which one is causing the issue. In other words, the display showing wrong data is not necessarily the faulty display.

Yes, try swapping displays as well: If the problem does not move with the display, then it is likely a flakey spring-clip on the female-side of the connector. I have found these by pulling each wire-spring one-by-one on the problematic connector, and the bad ones will usually be quite obvious (either broken completely, or with almost no spring left)

#25 4 years ago
Quoted from JT-Pinball:

I would get schematic and verify pin by pin each wire in all display connectors and J1 on MPU.

Quoted from snyper2099:

This is a VERY common Bally/Stern display problem. It is actually caused by one bad display affecting how the other displays show digits. You will need to unplug each display one at a time to determine which one is causing the issue. In other words, the display showing wrong data is not necessarily the faulty display.

Quoted from Dr_Dude:

Yes, try swapping displays as well: If the problem does not move with the display, then it is likely a flakey spring-clip on the female-side of the connector. I have found these by pulling each wire-spring one-by-one on the problematic connector, and the bad ones will usually be quite obvious (either broken completely, or with almost no spring left)

Thanks very much for the info. Maybe player 2's display is the culprit. I will check it out. If that doesn't work, I'll start diagnosing the wires and pins.

#26 4 years ago

Once you confirm it is not a display, which you have already done, use a schematic to verify the strobe/data line for the digit on the display that is acting up. You have a broken/intermittent wire on one of the connector pins that has two wires crimped into the pin. Replace. It could be on the affected display connector or the display "before" the affected one. Use standard troubleshooting techniques to verify.

#27 4 years ago
Quoted from MrBally:

Once you confirm it is not a display, which you have already done, use a schematic to verify the strobe/data line for the digit on the display that is acting up. You have a broken/intermittent wire on one of the connector pins that has two wires crimped into the pin. Replace. It could be on the affected display connector or the display "before" the affected one. Use standard troubleshooting techniques to verify.

Thanks for the info. I confirmed it's not the displays so now it's on to the connectors. I will concentrate on the two wire pins.
Thanks!

#28 4 years ago

I had a troublesome issue similar to this on a Bally Star Trek that I was restoring. I repinned connectors but the intermittent display issues persisted. I could wiggle a wire a little and sometimes the display issues would go away, but then come back. It ended up that I was working at the wrong end. The bad connector pin was at the other end where it connects to the MPU.
So, verify those header pins there, as well. Good luck!

#29 4 years ago
Quoted from Enaud:

I had a troublesome issue similar to this on a Bally Star Trek that I was restoring. I repinned connectors but the intermittent display issues persisted. I could wiggle a wire a little and sometimes the display issues would go away, but then come back. It ended up that I was working at the wrong end. The bad connector pin was at the other end where it connects to the MPU.
So, verify those header pins there, as well. Good luck!

Thanks, I will!

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