I saw this somewhere else and thought I would pass it along. To clear the message from the LCD display on Sharp 9400/9600 and TI Pro 600 printers:
[ol]Turn Printer off.
While holding down the Enter and Menu keys, power the printer on.
You should see PCU Diag Mode displayed.
Hit Menu key 6 times till Counter Set is displayed.
Hit Enter key
Dev xxxxx displayed, left 3 numbers are blinking.
Hit (down triangle symbol) till numbers are 000.
Hit Menu key, right 2 numbers are blinking.
Hit (down triangle symbol) till numbers are 00.
Hit Menu key.
Drm xxxxx displayed, left 3 numbers are blinking
Repeat steps 7-10.
Dev tm xxxxx displayed.
Repeat steps 7-10.
Drm xxxxx displayed.
Repeat steps 7-10.
Life xxx displayed.
Life should be set to 005.
Hit Menu key.
TNL xxx displayed.
TNL level should be between 90-110, if you have problems, try changing TNL.
Hit Enter key
Counter Set is displayed.
Hold down Form Feed key and insert blank paper into manual feed slot.
You should get a beep confirming reset.
Power printer down and back up, you are donn.[/ol]
[ol]Turn Printer off.
While holding down the Enter and Menu keys, power the printer on.
You should see PCU Diag Mode displayed.
Hit Menu key 6 times till Counter Set is displayed.
Hit Enter key
Dev xxxxx displayed, left 3 numbers are blinking.
Hit (down triangle symbol) till numbers are 000.
Hit Menu key, right 2 numbers are blinking.
Hit (down triangle symbol) till numbers are 00.
Hit Menu key.
Drm xxxxx displayed, left 3 numbers are blinking
Repeat steps 7-10.
Dev tm xxxxx displayed.
Repeat steps 7-10.
Drm xxxxx displayed.
Repeat steps 7-10.
Life xxx displayed.
Life should be set to 005.
Hit Menu key.
TNL xxx displayed.
TNL level should be between 90-110, if you have problems, try changing TNL.
Hit Enter key
Counter Set is displayed.
Hold down Form Feed key and insert blank paper into manual feed slot.
You should get a beep confirming reset.
Power printer down and back up, you are donn.[/ol]