Lexmark W812 Service Manual page 86

4022-XXX
Step Actions and Questions
3 PAPER PATH INSPECTION
Remove the paper trays.
Remove the Toner Cartridge.
Use a flashlight to inspect the entire paper path, from Feeder
to Output Tray, for any loose toner.
Is the paper path free of loose toner?
4 TRANSFER ROLLER INSPECTION
Rotate and inspect the Transfer Roller.
Is the Transfer Roller clean and free of toner?
5 FUSER INSPECTION
Generate a Test Print and switch off printer power when the
print is halfway through the Fuser.
Open the Top Cover.
Examine the paper before it enters the Fuser and after it exits
the Fuser.
Is paper clean before it enters the Fuser, but there is
background on the paper when it exits the Fuser?
6 Thoroughly clean the interior of the printer.
Replace the Toner Cartridge.
Generate 20 Test Prints.
Does the toner still appear on the back of paper?
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.
• HVPS - Go to
• Engine Card Assembly - Go to
page 4-10.
2-30
Service Manual
"HVPS Removal" on page
"Engine Card Removal" on
Yes
Go to step 4
Go to step 5
Go to step 6
Go to step 7
4-13.
No
Thoroughly
clean the
paper path,
from Feeders
to the Output
Tray, including
all rubber feed
rolls
Clean or
replace the
Transfer
Roller. Go to
"Transfer
Roller
Removal" on
page 4-38.
Clean or
replace the
Fuser
Assembly. Go
to "HVPS
Cover
Removal" on
page 4-14.
Problem
solved