F-14 periodically "Tilts" when target hit

[stiffler4444]

Hi,

I'm sure I've read about this before, but can find nothing on PinRev, so must have been another site. Very rarely, when I hit the left side bank of stand ups in the upper playfield, the machine tilts. I plan on working this out sometime this week, just curious if anyone can pinpoint my potential issue.

I have a system 11 repair manual that I will be using as well, just thought (hoped) it might be something simple like a ground (repairing = simple, finding not so much).

Thanks in advance.

Dave

 

[Grauwulf]

You've got all 4 legs on to keep it from tilting over, right?

Sounds like you have a switch diode that has one broken lead. Check them all to make sure they are firmly connected and none of them are shorted. Also check to make sure they are gapped properly.

 

[Menace]

What James said. Switch matrix issue for sure, likely a bad diode somewhere.

D

 

[Splitskull]

Like the other said: switch diode that has one broken lead or shorted out.

 

[stiffler4444]

Thanks guys, I will do as suggested! Will postup results as soon as I do.

Dave

 

[pinballfan]

i fix this problem.its a bad scrc6 on your mpu.

 

[stiffler4444]

I'll check that out. Found not bad diodes yet, but didn't get too deep into it. Thanks.

 

[Dave Astill]

check the switch maatrix , could be a shorted transistor on the cpu , fairly common with this game as the flashers are so close to the switches.