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CanonBJ F900, F890, F700, F500, S900, S820, S750 and S520

CanonBJ F900, F890, F700, F500, S900, S820, S750 and S520
Turn off the printer.
Press and hold the RESUME button, then press and hold the POWER button.
Release the RESUME button, then press and release the RESUME buttontwo more times in succession. (youre still holding the POWER button during this). The printer mechanics will move momentarily.
You are now in Service mode.
Pressing the RESUME key will select a function; for example, pressing RESUME 4 times will select the clear waste ink counter function. The lamp will alternate color with each key press.
1. service/factory test print out, including ink sensor check
2. EEPROM info printout
3. EEPROM initialization
4. Clear the waste-ink counter
5. Printer model setting. (more selections beyond this- leave this alone)
After selecting mode, press the POWER button to commit the change,and return to the top of the function selection menu. Pressing thePOWER button again turns off the printer for a rest