[DMcMahon]

Could not really see the latching detent mechanism operation in the right hand keys/buttons assembly so removed the assembly for a better look as per photo 1, the recorder design does not make this an easy task.

With it removed then able to see the detent operation (very difficult to actually see it on the FFD key). Photo 2 shows the Play key (not pressed) with detent notch not engaged with sprung loaded detent latching plate. Photo 3 shows the Play key pressed and the detent notch engaged at the detent plate. The Stop key somehow resets the sprung loaded detent plate to release the latch. The Play key detent works very well.

The FFD detent work well sometimes and intermittently other times it struggles to latch, cannot see why, the FFD key has 2 springs it operates against unlike the Play key that has no springs (at the assembly). Not convinced this is the root cause of the FFD latching problem but to be sure will try and strip down the assembly more to see why the FFD latch operation is sometimes struggling.

The lever at bottom of photo 4 looks maybe a bit bent/twisted (looks very similar in the TK 23) this lever which is moved up when FFD pressed, moves the Take Up reel table across to make contact with the rubber idler wheel. This lever also operates the mechanism with 2 springs as per photo 5 (photo ref 5011 in earlier Post) currently unsure what the actual function of this mechanism is, it looks like it may latch but does not appear to latch.

David