Gray background on prints check Lexmark MX710, MX711

Step 1 

a Turn off the printer, wait for 10 seconds, and then turn on the printer. 

b From the printer control panel: 

1 Increase the toner darkness in the Quality menu. Note: 8 is the factory default setting. 

2 Set the paper type, texture, and weight in the Paper menu to match the paper loaded.

Step 2

Check if the printer is using a genuine and supported Lexmark toner cartridge.

Note: If the printer is using a third‑party cartridge, then refer the users to their cartridge supplier.

Step 3

Install a genuine and supported toner cartridge.

Step 4

Check if the serial number of the imaging unit has 12, 13, or 14 in the fourth and fifth digits. (Example: CAS13xxxxxxx).

Does the serial number have 12, 13, or 14 in the fourth and fifth digits?

Step 5

a Remove any packing material left on the imaging unit, including pieces of tape (A) on the side of the unit and the red separator plastic (B).

Note: You may need a pair of pliers to remove a piece of broken plastic inside the imaging unit.

b Check the charge roller contact on the right side of the imaging unit for damage and proper installation.

Note: If the contact is missing (C), it may have been detached while removing the tape from the imaging unit.

Is the charge roller contact damaged, contaminated, or missing?

Step 6

Reinstall, repair, or replace the charge roller contact on the imaging unit.

Does the problem remain?

Step 7

Replace the imaging unit.

Does the problem remain?

Step 8

Make sure that connection J9 (HVPS) on the controller board and the connections on the HVPS are properly connected.

Are the connections properly connected?

Step 9

Reseat the connections.

Does the problem remain?

Step 10

Note: Poor electrical contact to the photoconductor is the most likely source of a full page background defect.

          a Remove any contamination from the HVPS contact (charge system) (D) on the right side of the frame.

 

Step 11

Check if the HVPS contact (charge system) is bent, damaged, or not in proper contact with the imaging unit.

Is the contact free from damage and in proper contact with the imaging unit?

Step 12

Repair or replace the HVPS contacts.

Step 13 

Check all connections in the HVPS for proper connection. 

Is the HVPS properly connected?

Step 14 

Replace the connections. Does the problem remain?

Step 15 

Replace the HVPS. 

Fixing print quality issues for Lexmark MX710, Lexmark MX711 etc.

MX81x, XM51xx, XM52xx, XM71xx, and XM72xx 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 developer (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.

• 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.

• 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.