8mm Forum: Bolex 18-5 -- repair sugggestions?

This is topic Bolex 18-5 -- repair sugggestions? in forum 8mm Forum at 8mm Forum.

To visit this topic, use this URL:
https://8mmforum.film-tech.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=1;t=012150

Posted by Vince Dean (Member # 6345) on March 12, 2018, 04:40 PM:

I'm a new member with a puzzling projector problem. I would be grateful for any suggestions.

I've recently resurrected my old Bolex 18-5 8mm projector and replaced the three drive belts with new ones I ordered from Chambless Cine Equipment. It ran nicely for a few minutes then the motor stopped running and the bulb went out. No noises, funny smells or smoke. Nothing happens with any position of the main switch. But surprisingly, when I press the auto-thread lever, the motor does run and threads the film just as well as ever.

The bulb seems OK--at least I get continuity with an ohm meter. FYI, I think this is the older "spaceman bulb". It has a stubby dome on top and the socket is on the bottom.

Can anyone suggest a likely cause or the next steps to troubleshoot the problem? I'm reasonably handy with mechanical and electrical problems.

Thanks for any thoughts or suggestions.

Vince

UBB.classic^TM 6.3.1.2