Lexmark W820 Service Manual page 108

Step Actions and Questions
2 VERTICAL SENSOR TEST
Enter Diagnostic Mode - Output Bin, Sensor Test.
Select Vertical Sensor. Insert, then remove, a sheet of paper
into the Sensor.
Does the Control Panel LCD change between OP and CL
as you insert then remove the paper?
3 BIN 10 JAM SENSOR TEST
Enter Diagnostic Mode - Output Bin, Sensor Test.
Select Bin 10 Jam Sensor. Insert, then remove, a sheet of
paper into the Sensor.
Does the Control Panel LCD change between OP and CL
as you insert then remove the paper?
4 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?
5 DRIVE BELT INSPECTION
While the Drive Motor is running, inspect the Drive Belt.
Does the Drive Belt run smoothly, without stalling or
slipping?
6 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?
7 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?
8 BIN GATE SOLENOID TEST
Enter Diagnostic Mode - Output Bin, Feed to all Bins.
Paper should feed into each Mailbox bin
Does paper feed into each Mailbox bin?
9 MAILBOX CONTROL PWB REPLACEMENT
Replace the
Does the error code appear?
2-26
Service Manual
"Mailbox Control PWB" on page
4025 Options
4-44.
Yes No
Go to step 3 Replace the
"Vertical
LED/Sensor"
on page 4-42
Go to step 9 Replace the
"Bin 10 Jam
Sensor" on
page 4-29
Go to step 5 Go to step 9
Go to step 6 Replace the
"Mailbox
Drive Belt"
on page 4-32
Go to step 7 Replace the
problem
"Mailbox Exit
Roll and Bin
Gate" on
page 4-38
Go to step 8 Replace the
"Transport
Guide
Assembly"
on page 4-54
Go to step 9 Replace the
problem Bin
Solenoid. Go
to "Gate
Solenoids 1 -
9" on
page 4-36.
Go to step 10 Problem
solved