CTM MIDI I beeps but doesn't start

[joindots911]

Hi,

My extractor has stopped working. There's what looks like a fuse link on the main control board which appears to have burned out. Wondering if anyone can confirm if this is indeed a fuse and if so what rating it should be?

Thanks.

 

[AstroKeith]

That isnt a normal circuit board 'fuse'. In its normal state it appears to be just a fairly thick single strand wire. It would take quite a lot of current melt it, but perhaps that is their intent.

Of concern is the green resistor above it in your photo. That looks like it has got fairly hot too.

The beep suggests the electronics is working, but the motor drive has blown. This would further indicate that the motor has developed a fault. Worn brushes can causing arcing that produces high current surges.

If it was mine, I'd replace the wire link, but first check out the motor.

 

[joindots911]

Agreed it doesn't look like a PCB fuse. I wondered if it was maybe something like "old school" fuse wire.

I've already tried a new motor in it and it doesn't run. The old one did have brushes that were worn down and I suspect this may have contributed to the issue. Will replace the wire link and see what happens. The green resistor looks ok - it may be dust that you're seeing on the picture.

 

[luvmytoolz]

If you have a multimeter, have you tested for continuity across that wire link as you can rule that out if it does.

 

[joindots911]

Yeah, it's open circuit. The green resistor reads 10 ohms, no visible markings on it however.