Lexmark W820 Service Manual page 173

Step Actions and Questions
4 Replace the "Engine Board (MCU PWB)" on page
Generate 5 Test Prints.
Is the lead edge registration correct?
5 Replace the "Printhead Assembly" on page
Generate 5 Test Prints.
Is the lead edge registration correct?
6 The following printer FRUs and areas are associated with this
specific problem. One or more of these FRUs or areas may
have failed partially or completely. If you cannot isolate this
problem using the steps in this Service Check, replace each
FRU or troubleshoot each area listed below, one at a time, until
you isolate and solve the problem.
• Registration Sensor - Go to
page 4-56.
• Registration Clutch - Go to
page 4-51.
• ESS PWB - Go to
page 4-94.
• I/O PWB - Go to
Side-to Side Registration is Not Correct
The printed image is not centered on the page. The side margins are not equal and the
image is cut off on either the right side or the left side.
THE PRINTER DISPLAYS NO ERROR CODE.
Step Actions and Questions
1 PAPER TRAY INSPECTION
Inspect the paper loaded in the paper tray.
Is the paper loaded correctly and are the paper guides
adjusted correctly?
2 SIDE-TO-SIDE REGISTRATION
Go to "Setting Printer Registration" on page 3-32
NVRAM to adjust Side-to-Side Registration.
Can you adjust side-to-side registration using NVRAM?
3 Reload print driver software.
Generate 5 Test Prints.
Is the side-to-side registration correct?
4 Replace the
Generate 5 Test Prints.
Is the side-to-side registration correct?
4025-XXX
"Registration Sensor" on
"Registration Clutch" on
"Controller Board (ESS PWB)" on
"I/O PWB" on page
"Engine Board (MCU PWB)" on page
4-92.
4-57.
4-89.
and use
4-92.
Yes No
Problem Go to step 5
solved
Problem Go to step 6
solved
Yes No
Go to step 2 Reload the
paper and
adjust the
paper guides
Problem Go to step 3
solved
Problem Go to step 4
solved
Problem Go to step 5
solved
Diagnostic Information
2-77