(Topic ID: 54531)

STTNG Left flipper does not work in video game mode and menu's


By Bumper

6 years ago



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  • 11 posts
  • 6 Pinsiders participating
  • Latest reply 6 years ago by Bumper
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#1 6 years ago

Since yesterday I am a proud owner of an almost mint STTNG but it has one technical problem.
In video game mode the left flipper does not work. During normal play it works fine. What should I look for to fix that?

In the forum there were only two other topics about that issue but one was unrelated (Gottlieb) and the other one was not resolved.

Any hint is welcome.

#2 6 years ago

I would start in switch edge test. Hitting the left flipper button should trigger two switches: lower left and upper left. My guess is you are only getting one and the video mode requires the one you don't get. Next would be to examine / clean / fix / replace the flipper opto board responsible.

#3 6 years ago

Cleaning the optos fixed that exact problem for me.

#4 6 years ago
Quoted from markmon:

I would start in switch edge test. Hitting the left flipper button should trigger two switches: lower left and upper left. My guess is you are only getting one and the video mode requires the one you don't get. Next would be to examine / clean / fix / replace the flipper opto board responsible.

I had the same problem on my STTNG, only one opto was reading in switch test. The other opto jarred loose from the opto board and needed repair.

#5 6 years ago

I did blow some air in it and re-soldered it, now it almost works. The 4th dot on the right from the test menu blinks but I think there need to be 4 squares. So I assume it is really broken.

The current receiver and transmitter is together as one part, could I just get a set like this to replace it? http://www.pinballlife.com/index.php?p=product&id=167

STTNG.JPG

#6 6 years ago
Quoted from Bumper:

So I assume it is really broken.

You assumed right.

LTG : )

#7 6 years ago
Quoted from Bumper:

I did blow some air in it and re-soldered it, now it almost works. The 4th dot on the right from the test menu blinks but I think there need to be 4 squares. So I assume it is really broken.
The current receiver and transmitter is together as one part, could I just get a set like this to replace it? http://www.pinballlife.com/index.php?p=product&id=167

Before you replace parts, does it work since you performed the work?

The parts you linked to can be made to work, but it's a huge PITA. You're much better off sourcing the right part. I believe that RottenDog makes replacement flipper boards, sold thru the regular sources.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

#8 6 years ago

A full flipper board coast about $35 and is not optical but mechanical. The replacement opto component is the Fairchild Semiconductor QVE11233 and cost just about $1.25 but the minimum order quantity is 50 pcs.

Because I had nothing to loose, I took the board out again and now really cleaned it well with hot soapy water, used canned air to blow dry the lenses and let it dry another day. Now it works perfectly!!!

I found on another forum an explanation for this, some plastics sweat, after a while an oily substance comes on the top and dust sticks to it so they become less transparent. With soap you can wash it away.

#9 6 years ago
Quoted from Bumper:

A full flipper board coast about $35 and is not optical but mechanical.

Nah...
These things sell dirt cheap, like 15 bucks at shows.
http://www.rottendog.us/FLP001.html
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webpages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The new place for pinball repair info

#10 6 years ago

He may be referring to the Great Lakes modular magnetic board

#11 6 years ago

I was referring to this Universal WPC Flipper Opto Board from MAD amusements: http://67.225.159.30/product.php?id_product=794

But thanks for the tips, a good clean helps.

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