OT? Apple Stylewriter problems (longish)

SW (no number 1) is early inkjet design w/ printhead ribbon rubbing during print, mechanical parking, printhead worm driven. Wears out too easily. SW2 and later, all later canons is much simpler and driven by belt, parking station much reliable. No. These canon inkjets I think is 32 or so nozzles and multiplexed (ala memory array style.) Printheads, cartridge for canon and HP has their IC built in by the nozzle on same die. Your nozzle test prints, each step is one nozzle, any gaps is clogged jet or dead. My friend w/ his original stylewriter decided to start printing blanks even it didn't caught itself that cartridge isn't working even cartridges were good. (!!) Good thing friend has spare printer to fall forward on, SW1200, both cartridges from SW he has work fine in SW1200. :-) Epson injet printers printheads is two piece design, two dies mounted directly to PCB and covered over with potting blobs is actual drivers driven by 8 bit addressing and clock via white flat tape ribbon cable. Two normally open switches for both tanks as gold pads made closed by spring leaf tipped w/ plated gold when tank is seated. Actual printhead itself is connected from that little vertical circuit board and fired by pizeo not heat. I knew this details because I did much tracing in 440 that blew it's print-head fuse on the motherboard. Found printer head itself is shorted. Cheers, Wizard PS: Successfully unclogged 3 epson inkjet printers today w/ very good results. The normal self cleaning is barely ok for minor problems, I always had to resort to brutal unclog methods on epsons that refuses to cooperate. Epson's printheads are about $100CDN. Took me years to develop the correct methods because other normal ways to deal with those epsons doesn't work at *all*. Aside from that, these epsons are very cheap, mechanically is pretty good.