Reset Code I need to reset a "Maintenance Required" error on the display on Sharp AR-M237.

It sounds like you have a bad toner cartridge. There is a chip on the rear end of the toner that is sometimes defective. It doesnt happen often, but it happens.
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this kind of problem requires maintenance of the machine completely. change the catridge and insert new toner in it. further check for the master code on the manual to reset the machine.

you have problem with the fuser temprature maybe the the heater lam or may be thermal fuse just check bothe if ok just reset.
thanks

You can reset the nic card password by ressetting the nic card to factory defaults, custom setting, key operator, 00000 , print settings , network settings, reset the nic, default password is Sharp

Try reset the error code by pressing [#] [INTERUPT] [C] [INTERUPT] [14] [START]. If error still exists check the thermostat and heater lamp of the fusing unit.

Since this appears to be a non-US model I can only base my response on the closest US body type AR-M237.

U2-40 means the countdown (CRUM) chip in your toner cartridge either broke or went to zero. If you can put in a fresh CRUM chip in your cartridge, that's great, otherwise you'll have to replace the toner cartridge.

L4-01 means main motor lock, probably due to a brownout or otherwise missed timing. You can probably get by with a power off and on. Not sharing your copier with other devices on the same outlet will also help here.

To reset error codes, put the machine in test mode with the four-key combo: # - * - C - * ... 16-Start clears your U2 trouble, 14-Start and 17-Start clear the rest. Then hit CA and allow your copier to reboot. Good luck!

Sharp AR-5620N getting f-2 error. What is the solution

on this code you may have to clean out the developing unit and start with fresh developer. Make sure the developer unit is not leaking from one of the bearings. You may need a tech for this one...

It's hard to be sure because our model numbers are different but drum reset should be 24-7 and dev reset should be 24-6. Good luck

You have to get into the sevice mode and reset the "PM" counter back to zero. Go to service mode and enter code 24 then enter sub code 04 back to all zeros and exit out and turn the copier off then back on and it should disapear.