Unrecoverable Software Error In Network Port; Bad Checksum While Programming Network Card; Flash Parts Failed While Programming Network Port; Face Up/Down Switching Error - Lexmark C920 Service Manual

976 - Unrecoverable Software Error in Network Port

Software error. Go to the "Options service check" on page 2-68,

978 - Bad Checksum While Programming Network Card

Software error.

979 - Flash Parts Failed While Programming Network Port

Reflash network port.

980 Face Up/Down Switching Error

980 Service
Switch Error
Check Area
B
Step Questions/actions
1 POR the machine into diagnostics mode. Perform the
output bin feed test on output bin 1. Can you hear the
FU/FD solenoid move during the feed test?
2 Is there continuity on the FU/FD deflector solenoid
between pins 1 and 2 on CN 4 on the CK2 daughter
board.
3 Is CN 4 on CK2 properly connected?
4 Are CN 3, CN 4, CN 5 on the printer controller board
properly connected?
5 Is fuse 1 on the printer controller board open?
and refer to the network card option section.
Yes No
Check to see if Go to step 2.
linkage from the
FU/FD solenoid
to the FU/FD
deflector is
broken. Repair or
replace the
face-up unit.
Go to step 3. Replace the
face-up unit.
Go to step 4. Properly connect
the connectors.
Go to step 5. Properly connect
the connectors.
Replace the Replace the
printer controller printer controller
board and the board.
drum eraser
assembly.
Diagnostic information
5056-XXX
2-21