Commodore 3022 Printer

[TonyDuell]

I have worked out how to dismantle (and reassemble ) this type of printhead. With the printhead out of the printer :

Place it on the bench standing on the solenoid unit with the 'nose' pointing upwards. Take out the 2 small screws holding the ribbon guide and take that off.

Remove the 2 larger screws that hold the mounting bracket, and remove that.

Remove the 2 small, but longer, screws in the flange of the 'nose unit'. Take that out (do not dismantle it). Lift off the heatsink block.

So far that's in the manual. Now :

Turn the solenoid unit over. The rear plate is clearly retained under some plastic tabs. Rotate the plate anticlockwise to free it and _carefully_ lift it off. 'Carefully' as there are 7 tiny compression springs around the edge.

Remove those springs with non-magnetic tweezers. Be warned if your tweezers are magnetised you will use language unsuitable for this forum.

6 screws are now exposed. Undo the 3 deeply recessed ones in the middle. Then lift off the complete armature unit. This does come apart with the other 3 screws but there's no point normally.

Recover the plastic insulator, then lift off the PCB with the coils.Under it is a thin plastic washer and another insulator.

I am not sure how practical it would be to re-wind the coils. There are no bobbins or formers. They seem to have been made with that self-sticking wire used for deflection coils, etc. But it might be possble.

[SiriusHardware]

Remove those springs with non-magnetic tweezers. Be warned if your tweezers are magnetised you will use language unsuitable for this forum.

I would add that in general, whenever you are dismantling something which you know or suspect contains springs, it is not a bad idea to get a large, clear plastic bag and work with the workpiece and your hands and arms inside the bag. That way, if anything makes a run for it, it won't get very far.