Hi

My stern flight 2000 act funny with the display, when the machine is an attract, the display altern between the high scored and the last scored. With the high scored, the display look pretty good, but with the last scored, some digit are not always there. When i play a game,some digit are on and off.

i already change the power supply board and the connector to the power supply, and there is a new SDB (rottendog). If it's connector causing this, can someone tell me wich one i have to redone? Is it possible that i have and MPU problem?

thank,s Gino

Je crois qu'il doit y avoir des pins de display dont la soudure est craqués, c'est très commun.
La plupart du temps on fait juste les faire fondre mais idéalement il faudrait enlever la soudure et les refaire.

Quoted from HAL-9OOO

Je crois qu'il doit y avoir des pins de display dont la soudure est craqués, c'est très commun.
La plupart du temps on fait juste les faire fondre mais idéalement il faudrait enlever la soudure et les refaire.

I doubt it... I gave him tested displays. And if some solder was cracked the problem would always happen. Not just with the last score playd.

Gino, does the problem happen in the self-test mode?

Quoted from Sparky

I doubt it... I gave him tested displays. And if some solder was cracked the problem would always happen. Not just with the last score playd.

Gino, does the problem happen in the self-test mode?

No! i just check and the display are fine in test mode. It's start to dim when it goes in attrack mode. When I turn the machine on, she search for ball in the playfield, during this the diplay are fine, when all the ball are in the lane and she goes in attrack mode everything flicker.

any idea

My guess is the U11 chip on the MPU.  Try reseating the U11.   If that doesn't work, swap U10 and U11.  If that doesn't work, try reseating U20 and/or swapping that with another U20 if you have one.  If that doesn't work, try wiggling various wires at J1 on the MPU while the machine is in attract mode.  You can find out exactly which wires to wiggle if you know what segments or digits are always off.  I don't think the wires are the issue though, since as Sparky pointed out, this would cause the digits to be missing for all scores, not just last score played.

Could it possibly be a 5101 problem ??  

Of course, if you have another MPU that you can swap in, that would at least narrow down the problem.   Doesn't sound like its power or SDB related.

Measure the high voltage output (TP2) on the Solenoid Driver.
It should be between +175 and +200 volts DC.

The other thing to check are cold solder joints at the header pins of the displays.
But, as Sparky commented, the display would be showing missing digits or segments
intermittently, but now always related to a specific game mode.

- Sylvain.

Thank's

Hi have the right voltage at SDB.

I do some test and this is what I found. When I put only 4 display (3 players display and 1 credit display) everything is fine, the probleme start when I put the 4 display. I try to isolated if one display cause the problem, but as soon as i remove one of the four, the probleme goes away.

I try to move the display around to see if it's located at the same place but no. If I remove the second display... everything fine, the thir5d one everything Ok. As soon as I put the 4 display... probleme?

Any Idea!

Can I change the MPU with the one in my seawitch and leave the rom there. Is it necessery to change the rom, if I just want to test the display?

thank,s Gino

Just for specification, the digit are not really on and off, but alternate between bright and dim.

Yes, you can swap the MPUs. Same configuration. Sounds like the MPU can't handle the signal to all the displays at the same time...

Quoted from Sparky

Sounds like the MPU can't handle the signal to all the displays at the same time...

Or the solenoid driver`s high voltage current capability/regulation is not able to handle all five displays...

Cheers,
- Sylvain.

Quoted from sylvain

Or the solenoid driver`s high voltage current capability/regulation is not able to handle all five displays...

Cheers,
- Sylvain.

The SDB is a new repro i have put today, got the same problem with the old one and the repro.

Quoted from Sparky

Yes, you can swap the MPUs. Same configuration. Sounds like the MPU can't handle the signal to all the displays at the same time...

Can I swap with my Dolly Parton MPU?

Quoted from redketchup

Can I swap with my Dolly Parton MPU?

No. The stern MPU is an M200. You will notice that you have an extra chip on the Stern MPU... the jumpers are not the same as well...

Have you considered LED displays? I can drop one off at your office next week for you to try. If it works, I can buy the standard displays off you and that would offset the cost of new displays... Could be the reason why there were 2 Pinscores in it in the first place... who knows.

Little updated!

put pinscore display in that and she's doing the same, didn't try to swap the MPU, but I'm pretty sure it's and MPU issue, since display, power supply and solenoid driver board are new.

Keep you posted

Si je passe chez toi en fds je t'emmènerai un mpu200 et on en seras certain. Si ca viens de là il s'agit peut-être de 2-3 chips suspectent qui controle les displays, c'est asser mineure comme réparation. On peut facilement les retracer sur marvin, ca doit etre bien documenté a ce niveau-là.

Edit: C'est peut-être plus difficile a retracé que ma première idée, je viens de jeter un coup d'oeil sur le site de marvin, il y a beaucoup d'infos alors il faut prendre le temps.

Ça doit commencer à faire cher mettre des repros tout le temps! Surtout que ça ne règle pas tous les problèmes...

Like Glen said, do you try to swap the PIA U10 on the MPU?
Maybe a grounding problem?

Quoted from Hyann

Ça doit commencer à faire cher mettre des repros tout le temps! Surtout que ça ne règle pas tous les problèmes...

Like Glen said, do you try to swap the PIA U10 on the MPU?
Maybe a grounding problem?

Hi Hyann

The power supply board is only 60$ and worth every penny for all the machine, the solenoid driver board is not so bad at 80$ ( mine was OK, so I now have a spare).  For the display I need a complete 7 digit for my seawitch and is pretty closed the same price for LED display than regular and with the LED, you don't need the High voltage section anymore... so I think is better.

I just order some PIA this morning to try if new one going to help. One folk on RGP mentionned that like Glenn!

Let you what happend

thank's Gino

Quoted from redketchup

Hi Hyann

The power supply board is only 60$ and worth every penny for all the machine, the solenoid driver board is not so bad at 80$ ( mine was OK, so I now have a spare).  For the display I need a complete 7 digit for my seawitch and is pretty closed the same price for LED display than regular and with the LED, you don't need the High voltage section anymore... so I think is better.

I just order some PIA this morning to try if new one going to help. One folk on RGP mentionned that like Glenn!

Let you what happend

thank's Gino

I have a lot of PIAs... you should have mentioned it before.

If you need to try an Alltek, let me know.

Quoted from Sparky

I have a lot of PIAs... you should have mentioned it before.

If you need to try an Alltek, let me know.

Merde!

Je vais attendre les PIA et voir par la suite!

Merci Ian

Quoted from mrniceguy

My guess is the U11 chip on the MPU.  Try reseating the U11.   If that doesn't work, swap U10 and U11.  If that doesn't work, try reseating U20 and/or swapping that with another U20 if you have one.  If that doesn't work, try wiggling various wires at J1 on the MPU while the machine is in attract mode.  You can find out exactly which wires to wiggle if you know what segments or digits are always off.  I don't think the wires are the issue though, since as Sparky pointed out, this would cause the digits to be missing for all scores, not just last score played.

Could it possibly be a 5101 problem ??  

Of course, if you have another MPU that you can swap in, that would at least narrow down the problem.   Doesn't sound like its power or SDB related.

And the winner is Mr Niceguy

Hal-9000 come at home this morning and we swap U10 and U11 and voila, everything seem to be good! Thank,s Hal-9000

thank,s everybody for the advice.

Glad to hear it worked out - I never noticed that problem when I had it, but I never had that many displays in it.