Lexmark C920 User Manual

Enabling operator panel menus
131
Administrative support
Enabling operator panel menus
1Turn the printer off.
2Press and hold   and   while turning the printer on.
3Release both buttons when Performing Self Test appears on the display.
The printer performs its power-on sequence, and then Config Menu appears on the first line of the display.
4Press  until  Panel Menus appears, and then press  .
5Press  until  Enable appears, and then press  .
The following messages appear briefly in succession: Submitting...

Adjusting Power Saver
132
Administrative support
Adjusting Power Saver
To  a d j u s t  t h e Power Saver setting:
1Make sure the printer is on and Ready appears on the display.
2Press   on the operator panel.
3Press  until  Settings appears, and then press  .
4Press  until  Setup Menu appears, and then press  .
5Press  until  Power Saver appears, and then press  .
6Using the numeric pad or the right and left arrows on the operator panel, enter the number of minutes for the 
printer to wait before...

Setting security using the Embedded Web Server (EWS)
133
Administrative support
5Press  until  Disable appears, and then press  .
Contents will be lost. Continue? appears.
6Press  until  Yes appears, and then press  .
The Encrypting Disk progress bar appears.
7When disk encryption has finished, press  .
8Press  until  Exit Config Menu appears, and then press  .
Setting security using the Embedded Web Server (EWS)
You can enhance the security of network communications and device configuration by using the...

Setting security using the Embedded Web Server (EWS)
134
Administrative support
No authentication and no encryption
Authentication with no encryption
Authentication and encryption
Note:Only the selected level and later may be used to communicate.
Supporting IPSec (Internet Protocol Security)
IP Security protocol provides authentication and encryption of communications at the network layer allowing all application 
and network communications over the IP protocol to be secure. IPSec can be set up...

Setting security using the Embedded Web Server (EWS)
135
Administrative support
Using 802.1x Authenticating
802.1x port authentication allows the printer to join networks that require authentication before allowing access. 802.1x port 
authentication can be used with the WPA (Wi-Fi Protected Access) feature of an optional internal wireless print server to 
provide WPA-Enterprise security support.
Support for 802.1x requires the establishment of credentials for the printer. The printer must be known to...

Quick start mode
136
Administrative support
Printing Lockout
Printing Lockout lets you lock or unlock a printer using an assigned PIN. When locked, every job the printer receives will 
buffer to the hard disk. A user can print jobs only by entering the correct PIN on the operator panel. You can assign a PIN 
through the Web page of the device.
Note:This setting is only available when a hard disk is installed.
Note:Back channel data will be processed while the printer is locked. Reports such as user or...

Black only mode
137
Administrative support
Black only mode
In black only mode, all colors print in grayscale. The printer prints fastest when in black only mode. Black only mode is off by 
default. Be sure to select black only mode both in the driver and through the printer operator panel.
To turn on black only mode through the printer operator panel:
1Turn the printer off.
2Press and hold   and   while turning the printer on.
3Release both buttons when Performing Self Test appears on the display.
The...

Troubleshooting
138
10Troubleshooting
Online customer support
Customer support is available on our Lexmark Web site at www.lexmark.com.
Calling for service
When you call for printer service, describe the problem you are experiencing, the message on the display, and the 
troubleshooting steps you have already taken to find a solution.
You need to know your printer model type and serial number. See the label on the inside top front cover of the printer for this 
information.
The serial number is also...

Solving printing problems
139
Troubleshooting
Solving printing problems
SymptomCause Solution
The operator panel 
display is blank or 
displays only diamonds.The printer self test 
failed.Turn the printer off, wait about 10 seconds, and turn the printer 
back on.
If the Performing Self Test and Ready messages do not 
appear, turn the printer off and call for service.
The message Error 
reading USB drive 
appears when using a 
USB device.The USB device you are 
using may not be 
supported or has an...

Solving printing problems
140
Troubleshooting
Incorrect characters 
print.You are using an 
incompatible parallel 
cable.If you are using a parallel interface, make sure you are using an 
IEEE 1284-compliant parallel cable. We recommend Lexmark part 
number 1329605 (10 ft) or 1427498 (20 ft) for the standard parallel 
port.
The printer is in Hex 
Trace mode.If Ready Hex appears on the display, you must exit Hex Trace 
mode before you can print your job. Turn the printer off and back 
on to exit Hex Trace...