Tray 4 Media Size Failure - Lexmark W850n Service Manual

Step
3 Check the tray 3 switch (media size) for proper
operation.
Pull out tray 3, and visually check it.
Is the switch (media size) for tray 3 installed properly?
4 Check the switch (media size) for proper connection.
Is the above switch connected properly?
5 Check the 2TM/TTM controller card assembly and the
printer engine card assembly for proper connection.
Are connectors P541 and P413 on the above cards
connected properly?
6 Perform a print test.
Does the error still occur?
7 Perform a print test.
Does the error still occur?

Tray 4 media size failure

Step
1 Check the media.
Pull out tray 4, and visually check it.
Is the media loaded in tray 3 properly?
2 Check the media.
Pull out tray 4, and visually check it.
Are the front media tray guide assembly and rear media
tray guide on tray 4 set correctly?
Check
Check
Yes
Go to step 4. Install the switch
(media size) for tray
3 correctly.
Go to
sheet drawer
(2TM)—switch
(media size)
assembly removal"
on page
Replace the switch Replace the
(media size). connection.
Go to "2X 500-
sheet drawer
(2TM)—switch
(media size)
assembly removal"
on page 4-8.
Go to step 6. Replace the
connection.
Replace the 2TM/ Problem solved.
TTM controller card
assembly.
Go to "2X 500-
sheet drawer
(2TM)—2TM/TTM
controller card
assembly removal"
on page 4-43.
Go to step 7.
Replace the printer Problem solved.
engine card
assembly.
Refer to the Printer
Service Manual.
Yes
Go to step 2. Load media
properly.
Go to step 3. Set the parts
properly.
Diagnostic information
4024-110
No
"2X 500-
4-8.
No
2-27