(Topic ID: 304236)

Gorgar with NMP Sensor drop targets reset issue

By Curt7284

14 days ago



Topic Stats

  • 4 posts
  • 3 Pinsiders participating
  • Latest reply 13 days ago by Bax1
  • Topic is favorited by 1 Pinsider

You

Linked Games

Topic Gallery

View topic image gallery

6C09C9EE-A6D3-4551-851C-DEE454F7BFA5 (resized).png
733388E9-35B6-40D0-B1C8-321BCB6F9CB6 (resized).jpeg
44F9ADAF-758D-4533-901D-55122E0F1E85 (resized).jpeg

#1 14 days ago

First and foremost I've been working through this issue with Bob Parvin the creator of the NMP sensors. I have to say he has fantastic customer service, replies fast to my emails and has been very helpful. I also believe in his product and unless I find concrete proof, I don't believe it's his sensor system thats causing this issue. I'm not one hundred percent sure if this issue existed when I still had the original horseshoe style drop target sensors but regardless the issue exists now. I just wanted to make a topic in an attempt to bring more minds into this and help me along the way. I've done a small amount of troubleshooting, but am relatively new and I want to learn as much as I can/do things myself.

I installed his sensors in both GOR and GAR drop target banks, The GOR bank operates 100% as it should. The GAR drop target bank is reseting prematurely activated by the lowest pop bumper. The problem seems to lie with G/A targets. If either one is up by itself or both up with the R down and the lowest pop bumper is activated then the drop target bank will reset.

I went through solenoid test mode and all the solenoids activate independently as they should and correspond to their number designation. I went through switch test mode and all switches register to their correct corresponding number. Then soon after that the GAR reset solenoid no longer activated. I went back into solenoid test and still the GAR solenoid is dead. I then went further into the diagnostic mode to 03 where I discovered the following stuck switches 44-GAR series, 21-GAR series, 19-O drop target, 41-G drop target, 42-A drop target 18-G drop target.

For information sake I just recently had the boards gone through, and in addition my drop target banks are removeable via molex connectors.

#2 14 days ago

Instruction Booklet Link https://www.ipdb.org/files/1062/Williams_1979_Gorgar_Instruction_Booklet.pdf

Manual with Schematics Link https://www.ipdb.org/files/1062/Gorgar_Manual.pdf

Pictures of the GAR Sensors

44F9ADAF-758D-4533-901D-55122E0F1E85 (resized).jpeg6C09C9EE-A6D3-4551-851C-DEE454F7BFA5 (resized).png733388E9-35B6-40D0-B1C8-321BCB6F9CB6 (resized).jpeg

#3 13 days ago
Quoted from Curt7284:

I then went further into the diagnostic mode to 03 where I discovered the following stuck switches 44-GAR series, 21-GAR series, 19-O drop target, 41-G drop target, 42-A drop target 18-G drop target.

Were the GO and GA drop targets infact down when you got this result?
If you do a continuity test of the blue reeds on the NMP board sitting on the bench, do any show zero ohms continuity? i.e. like they're reading as a closed switch?

On the lowest pop bumper, what switch(es) are reported in switch test mode when you close the pop bumper point score switch (not the spoon switch but the switch above it that the pop bumper activates for scoring)?

#4 13 days ago

I had this issue with my time warp. I had the wiring wrong. They would register but would not reset.

Hey there! Got a moment?

Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside