Lexmark W820 Service Manual page 130

Step Actions and Questions
6 TRAY 3 TAKE AWAY ROLL CHECK
1. Enter Diagnostic Mode - Input Tray Test
2. Select Tray 3, Single
Does the Take Away rotate when the HCF Motor runs?
7 HCF PWB REPLACEMENT
Replace the
Does the error code appear?
8 I/O PWB REPLACEMENT
Replace the I/O PWB.
Does the error code appear?
9 MCU PWB REPLACEMENT
Replace the printer Engine Board (MCU PWB). Go to the
printer service manual for the Removal and Replacement
Procedure
Does the error code appear?
10 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, one at a time, until you isolate
and solve the problem.
•
Wiring and connectors linking the FRUs
Error Code 943
There is a problem with Tray 3.
Logic Control on the MCU PWB sensed that the Tray 3 Paper Level Sensor did not
actuate within the specified time after the Tray 3 Lift Motor was actuated.
Step Actions and Questions
1 TRAY 3 LIFT MOTOR QUICK TEST
With printer power on, pull paper drawer 3 out to drop paper
table. Push drawer 3 closed. The paper tray motor should run.
Does Tray 3 lift motor run?
2 TRAY 3 CHECK
Slowly slide Tray 3 out of Feeder 3.
Can you hear the Tray 3 bottom plate drop as you slide the
Tray out of the Feeder?
2-48
Service Manual
"HCF PWB" on page 4-66.
4025 Options
Yes No
Go to step 7 Troubleshoot
the drive
transmission,
from the HCF
Motor to the
Take Away
Gear
Go to step 8 Problem
solved
Go to step 9 Problem
solved
Go to step 10 Problem
solved
Yes No
Go to step 2 Replace the
"Lift Motor"
on page 4-67
Go to step 3 Replace
Tray 3