Ahhhh, looking at the canon now, the plunger is back, different from the right one
This must be it, thanks so much. Thoughts based upon the pic
Left Canon
Pinball info
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Complete STTNG - Flipper Rebuild, left, Right, Upper Right - First time using a soildering Iron! Subway clean and Ball Popper, Opto Rebuild and other things:)
- Thread starter cmrl9
- Start date
This must be it, thanks so much. Thoughts based upon the picLeft Canon
Actually the right canon is incorrect, taken the canon cover off, the spring needs replacing and its not gonig back fully, so not this.
The plunger on the left looks like a new spring and plunger, seems to be going back fully.
needs a spring and some of the plastic rubbers
What a diagnosis.
Hi Moonraker,
Thanks, based upon your troubleshoting I agree i'm pretty sure the game is thinking a ball is in the canon. From playing it again just now.
Ball is ejected from ball hopper into canon, canon moves, fire ball, canon returns to loading postion, press trigger canon fires stationary, machine returns to normal.
Would the optos need changing, what would be the best way to test, I have a voltage meter.
Indeed, Moonraker must have owned or had the joy of fixing many STTNG. I must admit its a bit of a pain of a machine. Theres alot to go wrong
No, a member on here, but it was a fair/good price.
‘Twas from me. It was working when sold but did need a really good cleanup
No complaints from me!
besides you did say you wanted first refusal when I sell it It's a different machine now, if the lockdown ever ends you can pop over and have a look!
That indicates that a switch (most likely an opto) is active when it shouldn't be.
Use the test menu to clear all the balls then put the machine in switch test and check all optos, then leave it in switch test for 20 mins to see if any optos change status (to find a flaky opto). If nothing then thump the playfield with the palm of your hand and see if any optos are triggered.
I've a sneaking suspicion that you may need to change a capacitor on the 12-way opto board but try the above tests first to help rule out other possibilities.
Hi Moonraker,
Interesting, I had played it for a lot longer yesterday than I thought, probably 10 hours. (A bit embaressed
) My wife was playing for a bit.So, turned the machine on today, ran the switch opto tests, all correct, closed when should, open when ball goes through. Started to play the machine, all working correctly as it should, no issues with missing balls or left gun firing. Not sure how long I have been playing exactly today but maybe 1 to 1 1/2 hours, the issue started to appear again,
So the issue appears when either the machine is hot (played for quite a bit) or just when its played for a bit
Would you think this is a capacitor on the 12 way opto or something else? or too much playing! (it is old! !)
Ran all the switch tests again, after it had been played (without switching the machine off, all correct and playing as it should)
Many thanks for your help.
After it started failing at the 1 to 1 1/2 hour stage, did you leave it in the switch test for 20 mins to see if it was a flaky opto? My other thought is has the cannon wiring been replaced? they do break very easily and could give issues.
Nope, will do that tommorow, hangover permitting 
Regarding the canon wiring interesting, no it hasn't I have bought replacement from pinball heaven, but had enough of soldering
To be honest my actual thinking was the canons where working and I had changed quite a lot so would leave for another time.
The left canon wiring is tapped with insulating tape in places wrapped account the wires, the right looks factory original.
I will change the canon wiring and run the test as soon as the problem starts if it does!
Again, Thanks for your help, very much appreciated
Regarding the canon wiring interesting, no it hasn't I have bought replacement from pinball heaven, but had enough of soldering
To be honest my actual thinking was the canons where working and I had changed quite a lot so would leave for another time.
The left canon wiring is tapped with insulating tape in places wrapped account the wires, the right looks factory original.
I will change the canon wiring and run the test as soon as the problem starts if it does!
Again, Thanks for your help, very much appreciated
Recieved the last of the parts yesterday, you where 100% correct. The left canon wiring loom cables had been spliced together and taped. Swapped out the loom, seloniod, optos. Working perfectly. Thanks so much, pointed me in the correct direction.
Made a note of the wiring underneath.
Existing Cannon
Noticed tape on the solder for one of the opto's, might be the issue
Wiring out, opto's out, selonoid out.
Whats lurking under the electrical tape ....
Spliced wires!
Looks like the wiring loom broke and was repaired
Attachments
I was missing fish paper on the Ball hooper assembly, shipped some over from the US! (don't ask, the instructions said so!)
Fitted the fish paper to the two ball hoppers, adjusted the bracket for the seloniod so it was not as tight.
Will the machine work without any problems.....
Fitted the fish paper to the two ball hoppers, adjusted the bracket for the seloniod so it was not as tight.
Will the machine work without any problems.....
Does it work and play now......
View attachment PXL_20210131_141516969.mp4
View attachment PXL_20210131_141516969.mp4