Lexmark W820 Service Manual page 105

Step Actions and Questions
4 MAILBOX CONTROL PWB REPLACEMENT
Replace the "Mailbox Control PWB" on page
Does the error code appear?
5 MAILBOX MOTOR TEST
Enter Diagnostic Mode - Output Bin Feed Test.
Select single bin to feed one sheet of paper to one bin.
Does the Mailbox Motor run?
6 DRIVE BELT INSPECTION
While the Drive Motor is running, inspect the Drive Belt.
Does the Drive Belt run smoothly, without stalling or
slipping?
7 MAILBOX EXIT ROLL INSPECTION
While the Drive Motor is running, inspect the Mailbox Exit
Rolls.
Do the Exit Rolls run smoothly, without stalling or
slipping, and are they clean and free from wear?
8 PINCH ROLL INSPECTION
Open the Transport Guide Assembly and inspect, rotate, push
down and release each individual Pinch Roll.
Are the Pinch Rolls clean and free from wear, do they
rotate freely, and do they have a spring-action return?
9 BIN GATE INSPECTION
Open the Transport Guide Assembly and inspect each Bin
Gate; checking to make sure they are laying flat and that none
are broken or chipped.
Are the Bin Gates undamaged and all laying flat?
4025 Options
4-44.
Yes No
Replace the Problem
printer Engine solved
Board (MCU
PWB). Go to
the printer
service
manual for the
Removal and
Replacement
Procedure.
Go to step 6 Replace the
"Mailbox
Drive Motor"
on page 4-46
Go to step 7 Replace the
"Mailbox
Drive Belt"
on page 4-32
Go to step 8 Replace the
problem
"Mailbox Exit
Roll and Bin
Gate" on
page 4-38
Go to step 9 Replace the
"Transport
Guide
Assembly"
on page 4-54
Go to step 10 Replace the
problem Bin
Gate. Go to
"BIN Trays 1
- 9
Assemblies"
on page
Diagnostic Information
4-34.
2-23