FAQ’s for Naks: 550 series (including models with identical transport mechanism, 250, 350 and 500)

Question:

I have an issue going from RW into FF or play and vice versa
where the reels spin the wrong way initially for a second. Replacing the main drive / capstan belt does not change this.

Answer:

The problem is caused by a stainless spring that sits between the two reels, which has 2 braking fingers which engage then reel table bottoms every time the reel idler changes direction. If you remove the cassette well cover plate this steel spring can be seen. It has a slotted screw in the middle sealed with lock paint. Loosen the screw ¼ turn, and position the spring so the knuckle sits exactly on the highest point of the idler (which is below in a little window). Tighten the screw and check that the spring raises and lowers each time you move from FF to RW and is up in stop mode.