Lexmark W820 Service Manual page 113

Step Actions and Questions
2 DRIVE ASSEMBLY INSPECTION
Remove the EP Cartridge.
Hand rotate (counterclockwise) the Main Motor.
Can you easily rotate the Main Motor and do all of the
gears on the Main Drive Assembly rotate freely and
without binding?
3 SUBSYSTEM ISOLATION
Open the Left Upper Cover.
Touching only the drive gear at the end of the Roll, hand rotate
the BTR.
Can you easily rotate the BTR?
4 SUBSYSTEM ISOLATION
Remove the Fuser Assembly.
Hand rotate (counterclockwise) the Main Motor.
Can you easily rotate the Main Motor and do all of the
gears on the Main Drive Assembly rotate freely and
without binding?
5 SUBSYSTEM ISOLATION
Remove the Offset Unit.
Hand rotate (counterclockwise) the Main Motor.
Can you easily rotate the Main Motor and do all of the
gears on the Main Drive Assembly rotate freely and
without binding?
6 SUBSYSTEM ISOLATION
Remove the Tray 1 Feed Clutch.
Hand rotate (counterclockwise) the Main Motor.
Can you easily rotate the Main Motor and do all of the
gears on the Main Drive Assembly rotate freely and
without binding?
7 SUBSYSTEM ISOLATION
Remove the MP FEEDER ASSEMBLY
Hand rotate (counterclockwise) the Main Motor.
Can you easily rotate the Main Motor and do all of the
gears on the Main Drive Assembly rotate freely and
without binding?
8 Main Motor Test
Enter Diagnostics Mode to run a print test.
Does the Main Motor Run?
4025-XXX
Yes No
Replace the Go to step 3
EP Cartridge
with a new
one
Go to step 4 Replace the
"Left Upper
Cover
Assembly"
on page 4-52
Replace the Go to step 5
"Fuser
Assembly"
on page 4-65
Replace the Go to step 6
"Offset/Exit
Assembly"
on page 4-69
Replace the Go to step 7
"Tray 1 Feed
Clutch" on
page 4-14
Replace the Replace the
"MP Feeder "Main Drive
Assembly" Assembly"
on page 4-40 on page 4-79
Go to step 10 Go to Step 9
Diagnostic Information
2-17