Lexmark T520 Service Manual page 35

Infoprint 1120 and 1125
Sub Error Codes for 9XX and 2XX Error Codes
The sub error codes are helpful troubleshooting a paper path
problem, especially paper jams in the base printer, envelope feeder
and duplex unit.
When a 9XX or 2XX error displays, press and hold Return and press
Select to enter for sub error codes. The following is an example of
how the printer shows a duplex unit sub error code.
DU
DU
Sub Error Codes for 9XX and 2XX Error Codes
The sub error codes are helpful troubleshooting a paper path
problem, especially paper jams in the base printer, envelope feeder
and duplex unit.
When a 9XX or 2XX error displays:
1. Press and hold Return and press Select to enter for sub error
codes.
2. The first screen of information is displayed. Write down the
information.
3. Continue pressing Return and Select until each screen of
information is obtained.
4. When the last screen displays, the original message displays.
The following is an example of how the printer shows a duplex unit
sub error code.
DU
DU
2-8
Service Manual
Byte 1 Byte 2
XX XX
XX XX
Byte 5 Byte 6
Byte 1 Byte 2
XX XX
XX XX
Byte 5 Byte 6
Byte 3 Byte 4
XX XX
XX XX
Byte 7 Byte 8
Byte 3 Byte 4
XX XX
XX XX
Byte 7 Byte 8