Lexmark C540n Service Manual page 71

Step Questions / actions
Try using a different ethernet cable.
13
Did this remedy the situation?
Have the network administrator check the
14
network drop for activity.
Is the drop functioning properly?
Is the printer on the same wireless network as
15
the other devices?
Assign the correct wireless network to the
16
printer.
Did this fix the problem?
Are the other devices on the wireless network
17
communicating properly?
Verify that the wireless card is properly seated
18
on the controller board.
Is the wireless card seated correctly?
Properly reseat the wireless card.
19
Did this fix the problem?
Is the antenna damaged?
20
Replace the antenna.
21
Did this fix the problem?
Verify that the antenna is properly connected
22
to the wireless card.
Is it connected correctly?
Properly connect the antenna.
23
Did this fix the problem?
Check pin 6 for +3.3V, and Pin 5 for +5V. on
24
connector JUSBW1 of the controller board. Pin
1 and 4 are GND.
Are the voltages and grounds correct?
Yes
Problem resolved
Replace the controller
board. See
"Controller
board removal" on
page 4-20.
Go to step 17.
Problem resolved
Go to step 18.
Go to step 20.
Problem resolved.
Go to step 22.
Problem resolved
Go to step 24.
Problem resolved
Replace the wireless card.
See
"Wireless network
card" on page 4-85.
5025-2xx, 4xx
No
Go to step 14.
Contact the network
administrator.
Go to step 16.
Go to step 17.
Contact the network
administrator.
Go to step 19.
Go to step 20.
Go to step 21.
Go to step 22.
Go to step 23.
Go to step 24.
Replace the controller
board. See
"Controller
board removal" on
page 4-20.
Diagnostic information
2-35
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