Black Prints - Lexmark W820 Service Manual

Step Actions and Questions
4 IMAGE TRANSFER INSPECTION
Carefully remove the Test Print generated in step 3.
Inspect the print.
Was the toner image on the drum transferred completely
to the paper?
5 BTR REPLACEMENT
Replace the
Is the image still blank?
6 HVPS REPLACEMENT
Replace the
Assembly" on page
Is the image still blank?
7 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.
• CRU Connector and Contract Springs
• MCU PWB - Go to
page 4-92.
• I/O PWB - Go to
• Refer to the wiring diagrams and check for a broken wire or
loose connection between FRUs in the Xerographic sections of
the printer

Black Prints

The entire image area is black. There is no image visible on the page.
THE PRINTER DISPLAYS NO ERROR CODE.
Step Actions and Questions
1 PRINTHEAD WINDOW INSPECTION
Remove the EP Cartridge.
Inspect the Printhead Window for a sheet of paper that may
have lodged in front of it and could be blocking the laser beam
from reaching the Drum.
Is the Printhead Window free of paper?
2-62
Service Manual
"BTR Assembly" on page
"High Voltage Power Supply (HVPS)
4-88.
"Engine Board (MCU PWB)" on
"I/O PWB" on page 4-89
4025-XXX
4-61.
Yes No
Suspect an Go to step 5
intermittent
problem and
go to step 7
Go to step 6 Problem
solved
Go to step 7 Problem
solved
Yes No
Go to step 2 Remove the
paper