Strange StTNG fault

[Cryptkeeper]

This only started last night ,
All switches test fine in test mode .(Quick test)

when the ball is in the shooter lane I can no longer select a launch option with the flippers,

but

when I hit the right flipper the ball launches.
If the ball is in a cannon the right flipper also launches it ,

Any ideas before i get stuck into it ?

Thanks

 

[Spandangler]

Ahhhh, you gotta love sttng and it's quirks.

But no sorry. Can't help.

If I were a betting man however, I'd guess optos. One of the hundred on this game.

Good luck mate

 

[Johnnyo]

Hmmmm bit of an oddball fault but maybe possibly the flippers IIRC are part of the dedicated switches as are the volume and adjustment buttons the control of these are straight to the cpu board and the logic chips are very close to the battery holder. Maybe some old corrosion or new is playing havoc
with your inputs.

 

[Moonraker]

I suspect a cannon opto is active...

 

[Cryptkeeper]

I suspect a cannon opto is active...

Interesting!
and hopefully the right answer.
Hopefully get to look at it later and I'll report back.

 

[Paul R Owen]

Disable cannons and see if problem persists?

 

[Moonraker]

Disable cannons and see if problem persists?

Good idea but be aware that it may still have the problem if the opto is locked on when the cannons are disabled...

 

[Cryptkeeper]

Well I got to the bottom of this,but not suite sure how.

Found a dry solder joint on the thought making the first opto register randomly .
Fixed that and the problem was the same.
took the batteries out and still the same.

Played around with the glass off looking or anything strange .nothing unusual.
restart and its all fine.

I dont know but im saying nothing!

 

[pinballmania]

Prior to this fault, did you change the batteries or do any resets? This fault happens after a memory loss. Don't know why but all the Sttng's I've had have done this after a memory loss

 

[Cryptkeeper]

It didn't but.....
I hit start and it played a sfx I never heard.
I initially thought the batteries were dead and its had gone off free play.
I need to pull the finger out and fit a remote battery holder.
Tomorrow evenings job I think.

 

[Cryptkeeper]

So installed a remote battery holder.
And guess what!
Pinballmania was right. Same exact thing happened!
Just played until the right cannon was loaded and then it went back to normal!