Das war ein Ding! Ich musste den Drucker praktisch ganz auseinandernehmen, um einen Filz zu ersetzen. Aber nun tut der Drucker wieder. Ich k??mpfte mich sch??n durch das Service Manual und entfernte die unten abgebildete Einheit, um darin an den abgenutzten Filz heranzukommen.
Hier die wichtigsten Hinweise (siehe http://www.fixyourownprinter.com/forums/laser/40284#43 zuunterst), die mich auf die Spur brachten, weshalb der Drucker nur noch in Gelb druckte, und die auch den L??sungsansatz gaben:
Re: HP LaserJet 2550n Carousel moves but misaligned by toot (1/3/12 8:19 PM) reply
Hey everybody,
for carousel problem, or toner misaligned be careful to the solenoid on the top of the printer which it used to stop the carousel on the right position. The solenoid have a "foam" glued on it and with time this foam disappear. so it stay just the glue. when the solenoid is in action, the solenoid lever glued during very less time on it and make a bad stop of the carousel.
hope this will help you. sincerely
Re: HP LaserJet 2550n Carousel moves but misaligned by HP-Printer-Dave (1/9/12 11:41 PM) reply
Yes, many HP magnetic clutches are now sticking in the open position too long because the feldt pad for quieting the clutches clicking noise, disintegrates leaving only the glue causing the metal arm to stick to the glue. since these old printers keep going, it is a good idea to either put celophane tape over where the "quieting pad" used to be or remove the clutch arm & scrape off the sticky glue. Now the clutch arm will click when opening but won’t stick open. If taping over the sticky spot, use a 1.5 inch or so strip long enough to go over the brass looking circle that applies the magnitism & also over the back side of the "L" shaped metal. I haven’t had tape fall off in over 5 years. A trick is to tape down a small bit of que-tip cotton where the pad used to be; I have sheets of replacement sticky back feldt I use on all these clutches; I just cut off a small strip for each one. I’ve seen it on the LaserJet 2500, 2550, 2840, 4000, 4050, 4100, 4200, 4, 4+, 5, 5si, 8000, 4500, 4550, etc. If you’r getting the 41.1 error on the 4000 or 4100 then it is probably sticky paper feed clutch arms.
Re: HP LaserJet 2550n Carousel moves but misaligne by dmzcompute (1/10/12 5:17 AM) reply
You need to place something like a felt pad or electrical tape over the area you removed the glue. If you do not then the solenoid L arm will become magnetized causing worse issues. Only seems to be an issue with the 2500 series.
Es ging zwar heute ein halber Tag futsch, geschweige der Aufwand f??r die Internet-Recherche noch vor Weihnachten, aber die Herausforderung ist gemeistert. Und es hat Spass gemacht.
