Sharp AR 550U error code F3-42, paper Tray Desk Trouble..

SOURCE: Sharp AR-287 Copier error code H5-01

You might need to run a service mode to reset the machine:

P * C * 14 (start) then 1 for Yes and follow on screen directions, code should clear out.

SOURCE: error code Sharp AR-M 257

The F2-04 error code you are getting is that you are using the wrong toner.It may be form sharp,but it toner chips is different.Only the chips swapping at the toner back can help you.

SOURCE: Sharp AR-5127 H2-00 code reset

Sharp Fuser
H2-0 Fusing unit temperature error
H4-0 The fusing unit doesn't heat up.
***ALWAYS DISCONNECT POWER WHEN WORKING ON MACHINE***
You have to reset fuser errors with simulation 14. Push P * C * then 14 then Start (the button you use to make copies) and it should reset the code. If not then replace the fuser.
SM 5-1 should turn the lamp on. If lamp blinks on and off it is the thermistor, if it does not it is the lamp, but check the contacts on the lamp/fuser -- they have been known to erode.
Also check thermal fuse, if defective replace.

SOURCE: sharp ar 407

Hello sir;There have a procedure to reset;
1, press "program", "interupt", "clear", "interupt"
2, enter 14, then press start,then enter 0, press start again. then press clear.

SOURCE: sharp ar-m205 error code E7 11

U HAVE TO UPGRADE THE FIRM WARE BY ENTERING SIMULATION 49-1 THE VALUE IS d THEN UPDATE THE FIRM WARE IF U HAVE IT