42615101TH Rev.8 139 /
Oki Data CONFIDENTIAL
5.4.2.2.1 Entering self-diagnostic mode (level 1)
1. While holding the MENU+ and MENU- keys down at the same time, turn printer power on to
enter System Maintenance mode.
2. Use MENU+ or MENU- key keystrokes until “ENGINE DIAG MODE” appears (a few keystrokes),
and then press the ENTER key to display “DIAGNOSTIC MODE”.
DIAGNOSTIC MODE
XX.XX.XX FACTORY/SHIPPING
3. XX.XX.XX in the display indicates a PU FIRMWARE version. A factory working mode setting,
which is usually set to S-MODE of SHIPPING, is at the right of the lower display.
4. Go to each self-diagnosis step by using the MENU+ or MENU- key (pressing the MENU+ or
MENU- key rotates menu items).
5.4.2.2.2 Exiting self-diagnostic mode
1. Turn printer power off and, after ten seconds, on again.