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On a Sharp AR-201, the developer light comes on when 50,000 pages have been made since the technician (or factory,) last changed the developer substance and reset the counter. A tech should come out with a Preventative Maintenance kit because training is needed to remove the developer substance safely as well as to clean the optics, interior and inspect the fixing unit, drum and cleaning blade and vacuum out the copier. You should call for service and tell them the developer light is on so they know to bring a kit. And yes... I am factory trained on this model. Retired now.
F2 in sharp means, aproblem related to toner supply make sure the proper catridge is inserted, check with another toner catridge to make it clear that crum on the toner catridge is still good, then if the problem again continues you try to change the developer, next is ATC sensor and the next is developer unit if you have any queries feel free to contact me and rate me
If your developer is weak it will do exactly what you are referring your copier as doing. The job of developer is to carry the toner via magnetism and put it on the drum, as it gets older it starts to weaken and wont carry as much toner. I would recommend you replace the developer and hopefully it gets your copier back up to the quality that it used to be at.
this code refers to the drum....the copier is unable to create a patch on the drum that is satisfactory erplacement of the drum is needed the developer starter powder should be changed at the same time service technician required
There are 3 different U2 codes, but all are kinda related. They are all communication related errors to the MCU board. Firstly make sure the developer unit is in securely. You try canceling the error code by going into SIM mode. press the following keys one after the other "#" "interupt" "C" "interupt". enter 14 and press start, this should reset the copier. make sure the copier is restarted. If reset does not work and developer unit is in securely then it would more than likely require a technician. Hope this helps.
Generally F codes have to do with the finisher(used to be called a sorter). with the machine off, diconnect the finisher cord from the copier and power back on. This should allow you to test the copier. I'm not sure on this model how exactly the finisher cord comes out. but it should be self explanitory when you see it.