Where does the long lead go on my multimaster capacitor go

If it is not working now send in for repair, there are smaller wires inside device.

Fein 30762198013 but first before replace try to clean the variable resistor with a contact cleaner or wd40. and blow it out of dirt little chance sometimes it can help.

A capacitor is in in practice not nessecary but sometimes its only inside for radio interference suppression. remove it the switch is if you not know it also made to disassemble because of all its a realy dirt sensitive, but rarely defect i have never replace this part in all the time this year 20 years switches of this model al very little screwdriver is neccesary open it a little not neccesary to dismount it completely and spray wd40 inside wait a moment and blow the dirt carefully out remount and control always the AC cable for shure after.

It needs to be put up between plastic housing and field/stator.

First control the brushes for the length or a spontaneous broken cable . or elecric modul has MEASURE is neccesary of the 4 electric field contacts also.

Fein is an excellent tool and has an excellent warranty that will be void the moment you open the gearbox. I do not recommend this action. Fein is quick and responsive, especially for a less than one year issue. Farmerbear at FixYa.com

http://www.ereplacementparts.com is one of the online shops in you Country or a dealer for FEIN in your immediate environment.

With respect to the above "answer", this tool has NO locking lever! It uses only a set screw to hold blades in place. It so happens that newer "star" mounting blades will fit into this tool easily, One must center the blade so the fingers of the star are outside of the raised circular surround of the hole. A washer (use a larger tapered one) and the set screw will then press the blade against the back surface of the bit holder. Tighten up this assembly, turn it on a cut away!

these are pressed bearings and you have to put the head in a vice (carefully as it is cast aluminum) and use clamps to keep in in place while you hammer on the driving shaft flange (where the blades attach) it is a slow process, there is a locking spring that has to be released first. Then when the pressed bearing is loose you will still have to tap until the shaft comes out of the level (part with two prongs). afterwards you must pry out the armature carefully with a screw driver against the fan, be careful, this tool is not really meant to be worked on by us owners, obviously, and for this reason it sucks big time,

Hope this helps!
Inside the gearbox there is what should be a 2 pronged fork you may only be able to see 1 of these the other may be broken, the fork goes each side of the armature bearing. If the fork isnt broke it may be the armature bearing that fits inside the fork.
Hope that helps. Sean