Lexmark C 950 Service Manual

Diagnostic information 2-251
  5058-030
Go Back Previous
Next
High frequency bands  
StepCheckYesNo
1Check the four PC cartridges for proper installation.
Check the PC cartridge connections.
 Are the PC cartridge connections free of excess 
wear and contamination?
Go to step 2.Correct and 
clean 
contaminated 
pins, or replace 
the appropriate 
PC cartridge or 
connector.
2Replace the four developer housings and four 
developer carriers. Go to “Developer housing (C) removal” on page 4-48, “Developer...

2-252  Service Manual 5058-030  
Go Back Previous
Next
Diagonal banding
StepCheckYesNo
1Perform a print quality suite test to produce solid fill for 
each color.
Replace the appropriate developer unit housing for the 
color that is producing the diagonal banding. Go to 
“Developer housing (C) removal” on page 4-48, “Developer housing (K) removal” on page 4-54, “Developer housing (M) removal” on page 4-59, or “Developer housing (Y) removal” on page 4-65.
 Did this fix the problem?
Problem 
resolvedContact...

Diagnostic aids 3-1
  5058-030
Go Back Previous
Next
3.  Diagnostic aids
This chapter explains the tests and procedures to identify printer failures and verify if repairs have corrected the 
problem.
User operator panel, menus and messages
Understanding the operator panel
CalloutItemFunction
1Display Views printing options as well as status and error messages
2HomeNavigates back to the home screen
3KeypadEnters numbers, letters, or symbols
4Sleep buttonEnables Sleep Mode or Hibernate Mode
• A short press...

3-2  Service Manual 5058-030  
Go Back Previous
Next
Understanding the home screen
When the printer is turned on, the display shows a basic screen, referred to as the home screen. Touch the 
home screen buttons and icons to initiate an action such as copying, faxing, or scanning; to open the menu 
screen; or to respond to messages.
Note:  Your home screen, icons, and buttons may vary depending on your home screen customization settings, 
administrative setup, and active embedded solutions....

Diagnostic aids 3-3
  5058-030
Go Back Previous
Next
Menu map
This menu map identifies menus available to the user. The diagram shows the menus on the operator panel and 
items available under each menu. 
Some menu items or values are displayed only if a specific option or feature is installed on the printer. Other 
menu items may be effective only for a particular printer language. The values can be selected at any time, but 
they affect printer function only when the user has the optional equipment,...

3-4  Service Manual 5058-030  
Go Back Previous
Next
Accessing service menus
Access the following menus to identify problems with the printer and run diagnostic tests.
Configuration Menu 1. Turn off the printer.
2. Press and hold the 2 and 6 
buttons simultaneously.
3. Turn on the printer.
4. Release the buttons after 10 
seconds.The Configuration Menu group contains a set of 
menus, settings, and operations which are 
infrequently required by a user. Generally, the 
options made available in this menu...

Diagnostic aids 3-5
  5058-030
Go Back Previous
Next
Configuration Menu
Entering Configuration Menu
1.Turn off the printer.
2.Press and hold the 2 and 6 buttons simultaneously.
3.Turn on the printer.
4.Release the buttons after 10 seconds.
Available settings
Settings appear on the LCD in the order shown:
Reset Maintenance Counter
See “Reset Maintenance Counter Value” on page 3-11.
Black Only Mode
See “Black Only Mode” on page 3-7.
Print Quality Pages
See “Print Quality Pages” on page 3-10.
Reports
See...

3-6  Service Manual 5058-030  
Go Back Previous
Next
Action for prompts
This setting enables users to determine which input source would receive paper-related or envelope-related 
change prompts when they occurred. Regardless of the target source, the device always requires some type of 
user assistance to resolve the change prompt (examples: pushing a button to ignore the prompt and changing 
the source’s installed media). However, this setting gives a user the option of having the device resolve change...

Diagnostic aids 3-7
  5058-030
Go Back Previous
Next
Automatically Display Error Screens
To change this setting:
1.From the Configuration Menu, navigate to Automatically Display Error Screens.
2.Touch  or  to change the setting.
3.Touch Submit to save the setting, or touch Back to return to the Configuration Menu without saving any 
changes.
Black Only Mode
This mode enables a user to force the printer to always print color content in grayscale. Turning this setting On 
is equivalent to setting Print...

3-8  Service Manual 5058-030  
Go Back Previous
Next
To change this setting:
1.From the Configuration Menu, navigate to Disk Encryption.
2.Select Disable or Enable.
Energy Conserve
This setting affects the values that display in the “Sleep Mode” setting. With Energy Conserve set to Off, this 
menu displays Disabled which, when selected, deactivates the Sleep feature. When Energy Conserve is set to 
On, Disabled does not appear in the Sleep Mode menu.
To change this setting:
1.From the Configuration Menu,...