Developer's menu ............................................................................................................................ 162
Open the Developer's menu (LCD control panel) ......................................................... 162
Open the Developer's menu (touchscreen control panel) ........................................... 163
Product resets ................................................................................................................................. 164
NVRAM initialization ..................................................................................................... 164
Solve fax problems (fax models only) ............................................................................................................... 165
Introduction ..................................................................................................................................... 165
Fax troubleshooting checklist ......................................................................................................... 165
Solve general fax problems ............................................................................................................ 166
Faxes are sending slowly .............................................................................................. 166
Fax quality is poor ......................................................................................................... 167
Fax cuts o or prints on two pages .............................................................................. 168
Solve email problems (M426, M427 printes) .................................................................................................... 169
Cannot connect to the email server ................................................................................................ 169
Validate the SMTP gateway (Windows) .......................................................................................... 169
Validate the LDAP gateway (Windows) ........................................................................................... 169
Manually update the rmware .......................................................................................................................... 170
Manually update the rmware (LCD control panel) ........................................................................ 170
Manually update the rmware (touchscreen control panel) .......................................................... 170
Appendix A Printer specications .................................................................................................................. 171
Printer dimensions M426 and M427 ................................................................................................................. 172
Printer dimensions M402 and M403 ................................................................................................................. 174
Printer space requirements ............................................................................................................................... 176
Power consumption, electrical specications, and acoustic emissions ........................................................... 176
Operating-environment range .......................................................................................................................... 176
Certicate of Volatility ....................................................................................................................................... 177
Index ........................................................................................................................................................... 181
xii ENWW