8
The exit rollers turn.
9
Ready
appears on the display.
If no error code is displayed, but a symptom is present, go to
“Base printer symptoms” on page 107
.
Fixing print quality issues
The symptoms described in this chapter might require replacement of one or more CRUs (Customer Replaceable Units)
designated as supplies or maintenance items, which are the responsibility of the customer. With the customer's
permission, you might need to install a toner cartridge.
Initial print quality check
Before troubleshooting specific print problems, complete the following initial print quality check:
•
The printer must be in a location that follows the recommended operating environment specifications. See
“Operating environment” on page 273
.
•
Check the life status of all supplies. Any supply that is low should be replaced.
•
Load 20
‑
lb plain letter or A4 paper. Make sure the paper guides are properly set and locked. From the control
panel, set the paper size and type to match the paper loaded in the tray.
•
Print a menu settings page. Be sure to keep the original menu settings page to restore the customer’s custom
settings if needed.
•
Verify on the menu settings page if the following are set to their default values:
–
Print resolution: 600 dpi
–
Toner darkness: 8
•
Check the transfer roll for damage. Replace if damaged.
•
Check the toner cartridge and imaging unit for damage. Replace if damaged.
•
Print the print quality pages to see if the problem remains. Use Tray 1 to test print quality problems.
•
Print a print quality test page, and then look for variations in the print from what is expected. Verify if the settings
under EP Setup are set to their default values. See
“EP Defaults” on page 130
.
•
Check to ensure the correct printer driver for the installed software is being used. An incorrect printer driver for
the installed software can cause problems. Incorrect characters could print, and the copy may not fit the page
correctly.
Gray background or toner fog check
ABCDE
ABCDE
ABCDE
Leading edge
Trailing edge
4514
Diagnostic information
32
Summary of Contents for M1140
Page 18: ...4514 18 ...
Page 20: ...4514 20 ...
Page 142: ...4514 142 ...
Page 197: ...b Set the spring over the plunger 4514 Repair information 197 ...
Page 204: ...3 Squeeze the latches B to release the left and right links B 4514 Repair information 204 ...
Page 228: ...10 Remove the screw C and then detach the trailing edge sensor A 4514 Repair information 228 ...
Page 229: ...11 Disconnect the two springs D 4514 Repair information 229 ...
Page 246: ...3 Swing the right cover backward to remove 4 Remove the screw D 4514 Repair information 246 ...
Page 248: ...4514 248 ...
Page 253: ...4514 253 ...
Page 255: ...Assembly 1 Covers 4514 Parts catalog 255 ...
Page 257: ...Assembly 2 Electronics 1 4514 Parts catalog 257 ...
Page 259: ...Assembly 3 Electronics 2 4 3 2 1 6 5 4514 Parts catalog 259 ...
Page 261: ...4514 Parts catalog 261 ...
Page 262: ...Assembly 4 Frame 4514 Parts catalog 262 ...
Page 264: ...4514 Parts catalog 264 ...
Page 265: ...Assembly 5 Option trays 3 4 5 6 1 2 4514 Parts catalog 265 ...
Page 268: ...4514 Parts catalog 268 ...
Page 270: ...4514 270 ...
Page 274: ...4514 274 ...
Page 276: ...4514 276 ...
Page 298: ...4514 Part number index 298 ...
Page 302: ...4514 Part name index 302 ...
Page 303: ......