B&H 1695 TQ3 running fast question

[Jonathan Wood]

Hi all, I have a Bell and Howell 1695 TQ3 (Grey) projector that is running way too fast, probably around 35-40fps. The speed switch has no effect. Ive tried adjusting the two pots as per the manual but this has no effect. Ive had a quick look inside and the belt looks fine (being a TQ3 it only has the one pulley so I don't see how that can be the problem.) I've noticed small signs of scorching on the end of the 1000mf 35v axial cap on what I think is the fuse board (Its straight in front of you above the motor?) which I will replace. Does anyone have any ideas ? I'm assuming the speed control PCB is in the bottom near the amp ? . Any help or advice will be gratefully received.

Best wishes
Jon