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(Topic ID: 266583)

Muhammad Ali Stern Pinball Machine

By ak1107

4 years ago



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You

Linked Games

  • Ali Stern Electronics, 1980

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#1 4 years ago
OP
 
???

ak1107

Inactive member

Unknown

4y 4,250 2

Hi

Not sure if anyone can help here, but i'm a huge Ali fan and i made the crazy decision to buy an Ali Pinball machine, which i have no regrets, its great fun, but i am having issues with the scoring screens not working, as per the pics attached, can anyone advise what i could check, i have dismantled a few its, tested the fuses near the coin slot and they seem to have power so i'm a little lost. I was going to call someone in to repair it but we're on quite a big lock down in the UK and wondered if anyone here could give me some guidance/help as to what i could try next.

Thanks in advance.

Aaron
ALI1 (resized).jpgALI1 (resized).jpgALI2 (resized).jpgALI2 (resized).jpgALI3 (resized).jpgALI3 (resized).jpg

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#2 4 years ago
 
EMS

emsrph

Pinside member

12y 75,300 1,352 1

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#3 4 years ago
 
LXL

Isochronic_Frost

Saratoga Silverball

7y 221K 9,408 108 1 1

OP
Quoted from ak1107:

Hi
Not sure if anyone can help here, but i'm a huge Ali fan and i made the crazy decision to buy an Ali Pinball machine, which i have no regrets, its great fun, but i am having issues with the scoring screens not working, as per the pics attached, can anyone advise what i could check, i have dismantled a few its, tested the fuses near the coin slot and they seem to have power so i'm a little lost. I was going to call someone in to repair it but we're on quite a big lock down in the UK and wondered if anyone here could give me some guidance/help as to what i could try next.
Thanks in advance.
Aaron
[quoted image][quoted image][quoted image]

Was it working when you bought it?

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#4 4 years ago
 
STC

chas10e

Pinside member

US Kittery, ME

8y 51,550 1,311 7

That board does looks like it needs a little attention. the thing that I see resistor R2 looks like it blew out but according to this: http://www.actionpinball.com/tech/bly_volts.php it doesn't affect the displays

Do you have a multimeter?
you could check the diodes CR1, CR2, CR3 & CR4

could you verify the value of fuse "f2" it should be 3/4A slo-blo

For the displays there is also a fuse on the SDL (Solonoid driver board)

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#5 4 years ago
 
???

silver_spinner

AR Gaming Rentals (MI)

11y 77,550 3,046

start from scratch. redo the power supply connectors, resolder the power supply pins, replace all fuses in power supply, rebuild and upgrade the: driver pcb, sound pcb, mpu. reflow all displays.
Then, plug the game in and try to boot it up, if there are issues, get out a meter and test voltages at power supply itself and all boards.

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#6 4 years ago
OP
 
???

ak1107

Inactive member

Unknown

4y 4,250 2

wow, you lot are great, that was quick, i will have a read up and have a go at testing a few items and come back with the results, well when i purchased it the seller said it was working, then when it arrived this part wasn't, it game from Germany and i am uk based so to return it would be a nightmare but was a little disappointed that it wasnt working. Fingers crossed i can find the solution without spending too much, again, thanks a lot for all the advice so far, really do appreciate it, hope you all stay safe and will come back in a couple of days

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#7 4 years ago
 
GRY

generalgman

Pinside member

12y 52,050 378

There is a severe amount of corrosion on that 9 pin connector with the 4 wires going into it. I would gently remove those 3 connectors to inspect and you may need some pin and terminal repairs. Sometimes just removing and reinstalling the connectors will wipe the contacts enough to get it working again, but only temporary.

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#8 4 years ago
 
NDE

Spyderturbo007

Pinside member

9y 108K 5,648

One quick thing I've read while you're working on things, is I've been told to never disconnect or reconnect the displays with the power on. Apparently that will blow the display.

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