Lexmark X 204 Service Manual

Diagnostic information2-35
7011-2xx / 3xx
Print quality service checks
Note:  Ensure cover is closed tightly. A gap in the opening may allow light to expose the photoconductor 
resulting in a ‘dirty’ print. 
Using print quality test pages
Blank page 
Black page
Note:  Incorrect laser exposure or incorrect charging of the photoconductor causes an all-black page. Always 
verify the same results from a different print cartridge assembly and developer before proceeding.FRU Action“Service error codes” on page...

2-36Service Manual 7011-2xx / 3xx
Heavy background
Poor development or poorly charged toner particles cause excessive background. This is more noticeable as 
the toner cartridge nears end-of-life.
Partial blank image/white spots (no periodic pattern) 
Variation in image density horizontally across page 
Poor fusing of image 
FRU Action
Toner cartridge (not a FRU)
PC Kit (not a FRU)Make sure the toner cartridge and PC Kit are correctly installed and 
the high voltage contacts are clean. 
If the toner...

Diagnostic information2-37
7011-2xx / 3xx
Light print 
White or black lines or bands 
Toner on back of page 
FRU Action
Toner cartridge (not a FRU) Make sure the toner cartridge and PC Kit are installed correctly and 
that the toner cartridge is not low on toner. 
If the problem continues, install a new toner cartridge.
Recheck condition before replacing PC Kit if necessary. 
Transfer roll 
LVPS/HVPS board Check the transfer roll for signs of toner buildup and contamination.
Inspect the HVPS contact...

2-38Service Manual 7011-2xx / 3xx
Solving print quality problems 
Problem Action
Light or blurred characters. Light print
The toner cartridge may be getting low on toner: 
• Remove the toner cartridge and print cartridge assembly. 
• Shake it from side to side to redistribute the toner. 
• Reinstall it and recheck for condition.
• Make sure you are using recommended print media (see media 
types and sizes in the User’s Reference.)
• The toner cartridge or PC Kit may be defective. Replace the PC 
Kit...

Diagnostic information2-39
7011-2xx / 3xx
The Toner Low message is 
displayed. • Remove the toner cartridge, and gently shake it from side to side 
to redistribute the toner (6K cartridge only). 
• Replace the toner cartridge.
Solid black areas on 
transparencies or white streaks 
on paper.• Choose a different fill pattern in your software program.
• Try a different type of paper. Paper designed for copiers gives 
the best quality.
• Remove the toner cartridge, and gently shake it from side to side 
to...

2-40Service Manual 7011-2xx / 3xx
The paper sticks together/MFP 
feeds multiple sheets of paper. • Remove the paper from Tray 1, and fan it.
• Don’t overfill Tray 1(see media capacities in the media types and 
sizes chart in the User’s Reference).
The paper fails to feed from 
Tray 1.• Remove the paper from Tray 1, and fan the paper.
• Make sure Tray 1 is selected from the MFP driver.
• Do not overfill the tray.
• Check the condition of the rubber on the paper feed rolls. 
• Verify clutch for ACM is not...

Diagnostic information2-41
7011-2xx / 3xx
840.xx service check
Step Questions / actions Yes No
1 POR the machine into configuration mode. 
Go to the disable scanner menu item. See 
“Disable Scanner” on page 3-21. Touch 
“Enable ADF/FB -Enabled and press 
Submit to save the change. POR the MFP 
to operating mode. Try running a copy from 
the ADF and flatbed. 
Did the 840.xx error recur?Go to step 2. Stop. Problem resolved.
2 Re-enter Configuration mode, scroll to and 
select the Disable Scanner menu...

2-42Service Manual 7011-2xx / 3xx
7 Replace the ADF unit. See “ADF assembly 
removal” on page 4-46. POR the machine 
into configuration mode. Go to the disable 
scanner menu item. See “Disable 
Scanner” on page 3-21. Touch “Enable 
ADF/FB -Enabled and press Submit to 
save the change. POR the MFP to operating 
mode. Run a copy from the ADF.
Did the 840.xx error recur?Go to step 8. Stop. Problem solved.
8 Inspect J15, J2, 1 and J5 on the controller 
board.
Are the connections properly connected?Go to step...

Diagnostic information2-43
7011-2xx / 3xx
Scan quality service checks
Image unclear
Irregular movement
No image
Problem Action
Dirt on flatbed glass or calibration 
reference plateClean glass with isopropyl alcohol.
Black page If the MFP can print normal pages from the host PC see “Flatbed 
service check” on page 2-24.
Lamp too dark Perform CIS service check. See “Flatbed service check” on 
page 2-24.
Scanner not properly registered Perform scanner registration in diagnostics. See Go to “Scanner 
Manual...

2-44Service Manual 7011-2xx / 3xx
Squeeky print service check 
Transfer roll service check 
FRU Action
Upper paperfeed deflector 
assembly (Not a FRU)1. Remove the printer cartridge and photo conductor.
2. Use a spring hook to remove the springs (A) holding the deflector 
assembly in place.
3. Tilt the assembly up and pull it out of the printer.
4. Pull the shaft out and clean the rollers and deflector with a cloth.
5. Reassmble the deflector and install it in the printer.
FRU Action
Transfer rollCheck...