What is the code to enter service mode to clear error codes and reset the drum status...receiving error code 100 after changing toner cartridge and will not print.

Hi,

The code refers to a toner motor lock error, probably caused by a blocked toner cartridge. If you have a replacement toner cartridge, power the machine off, replace the cartridge & power the machine back on. If the code remains then it may need resetting via the simulation mode. To enter simulation mode, press the following 4 keys in sequence #*C*

then enter 14, press the copy key, then press the CA key. The machine should reboot.

in order press

* Entering the simulation mode

1) #/P key (program) ON → Asterisk (*) key ON → CLEAR key ON →
Asterisk (*) key ON → Ready for input of a main code of simulation
Simply # * C * and the machine will enter simulation mode.

Then enter the number 16, which is U2 code correction, follow what the screen says, Normally just press start and the machine will reset.
U2 codes are software glitches. A U2 40 is a CRUM fault which is a drum or toner chip problem.
Sim 16 almost always clears them.

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How are you , this problem occurs when there is very low toner concentration on the unit or low developer.
solution

1. Replace a toner cartridge and make sure it is smoothly running as some come with hardened toner or
2. Replace a new developer which is Sharp Ar 205 dv Check that the toner motor is rotating well

This error is self resetting so no need of simulation code. Bye.

Most commonly a toner cartridge issue. First try removing then reinstalling the toner cartridge and power off the machine. If this does not solve your issue then reset the error using the following:
Press these keys in sequence: #, interrupt, clear, interrupt. (screen should say service mode), enter 16, press print, it will ask are you sure? press yes.
This will reset the code so you can see if the code comes back
If it does then you have to change the toner, it has a defective crum (counter chip) on the back of it

To find out the sub code for the U2 error hold down the Start key. Below is a list of the errors:
U2-04 EEPROM serial communication error
U2-11 Counter check sum error
U2-12 Adjustment value check sum error (EEPROM)
U2-40 CRUM communication error

To clear the U2-40 error try pulling out the toner cartridge and firmly reinstalling it. If that doesn't work you must install a new toner cartridge. There is a CRUM chip on the cartridge that keeps up with how many impressions have been made with that cardridge. You cannot "refill" these cartridges without replacing the CRUM. This problem occurs frequently with remanufactured cartridges.

To clear other U2 errors you must enter simulation mode.
Perform the following procedure to enter the simulation mode.
Clear key - Interrupt key - "0" key - Interrupt key - 16 - Start key - Start key. The unit should reset.

With "J2" flashing, press:
1. "CLEAR" button
2. "AUTO" button, then again
3. "CLEAR" button
4. "AUTO" button

Do it fairly quickly. If it's done quickly enough the display goes off. When it does:
5. enter "2" and "4" (see "24" on display)
6. Press "START/COPY"
7. Press "7"
8. Press "START/COPY"
DONE

If display doesn't go off repeat steps 1 to 4 but faster, until display is off.

Found this at Fixyourownprinter.com

1. Turn machine on while pushing and holding the TWO up/down menu buttons at same time.
2. Menu window will show "OKI USER"
3. Scroll to " Engine Dialog Mode" is indicated. Push Enter button.
4. "Diagnostic Mode xx.xx.xx S-Mode is indicated.
5. Scroll to "NV-Ram initial" is indicated. Push ENTER.
6. Window shows "NV-Ram- Initial Table 1".
7. Push ONLINE and ENTER Buttons simultaneously and HOLD for 10 seconds after you see "Executing Reset" appear in menu window.
8. Restart printer.

All toner, drum, fuser and transfer figures return to 100%.

Worked for me when I had the same error. Hope it helps.

You need to reset the bottle code. Clear/modes, 1,0,7, press and hold clear button. enter copy sp. select drum(#2) scroll to 2972, enter 0 and press # key. Do the same for 2973. exit all the way out, and recycle power.