Theatre Trunk intermit fault

[vett]

Hi Trunk works fine for 10- 15 games and then stops turning , score works but trunk stuck/stopped.
if i turn machine off and back on 30 seconds later , everthing is great and all working Ok for another 10 or so games and then trunk stops again.
Anyone had this trouble before?   Any glues where to start looking

[Strangeways]

Is the trunk loose ? The gearbox has a set of internal grub screws that often become loose and the shaft looses it's grip. There is also an opto interrupter that may need tightening. I can't recall if there is a "Trunk Test", but you could try entering the diagnostics and testing the trunk and optos.

Covered here on page 2

http://aussiepinball.com/index.php?topic=6943.15

[vett]

I have gone into trunk test and all working ok No fault. but will check for loose gear box , but i think if it was ,when i reset machine it would still fault/Stop if it was gearbox

[vett]

I will check  opto interrupter as you say it  may need tightening and this could be where the trouble is , and i will report back .cheers

[pinball god]

when you get the problem, rather than switch off, go onto trunk test and see if its between positions. I can get this if I hit the trunk mid turn and it will stop between settings. if this is the case the trunk could be too loose as my problem is very infrequent.

[vett]

Ok Trunk stopped working every second game now, making it easier to find fault.3 optos faulting 56,57,58 and a noise like trunk was doing it tough to turn.
Got the manaul out and removed trunk mech from game and checked it out . Found allen keys on bottom lock nut with stopper post closest to gear box was loose and also black opto disc had a small crack in it that would only open up when you tighten it onto post. Lubed gear box , tighten bolts, glued disc and refitted , all appears to be working Ok for now, But will order new black opto disc to change later. Thanks for leads/advise on where to look. Cheers