Lexmark C720 Service Manual page 87

5024-001
Error Code
979
Flash Parts Failed
While Programming
Network Card x Error
980
Duplex Controller
Hardware Error
981
Duplex Motor (DPM1,
DPM2) Error
982
Upper Solenoid
(DSOL-U) Error
983
Duplex Fan (D-FAN)
Error
984
Duplex Lower
Solenoid (DSOL-L)
Error
990
Drum Encoder
Sensor (HPSEN)
Error
Action
Indicates that flash parts failed while programming
network card x. If this is a network model printer,
replace the controller board.
The error indicates a problem with the duplex (DUP
P.W.B.) and main engine (MCTL P.W.B.) hardware
control.
Reset the printer power switch.
Ensure the harness between the DUP P.W.B. board
and the main engine (MCTL P.W.B.) board are
connected.
If the problem still exists, replace the duplex (DUP
P.W.B.) board.
The error indicates a problem with the duplex motors,
DPM1, and DPM2.
Go to "981—Duplex Motor (DPM1, DPM2) Service
Check" on page
This error indicates a problem with the duplex upper
solenoid (DSOL-U).
Go to "982—Duplex Upper Solenoid (DSOL-U)
Service Check" on page
This error indicates a problem with the duplex fan
(D-FAN).
Go to "983— Duplex Fan (D-FAN) Service Check"
on page 2-59.
This error indicates a problem with the lower duplex
solenoid (DSOL-L).
Go to "984—Duplex Lower Solenoid (DSOL-L)
Service Check" on page
This error indicates a problem with the transfer drum
sensor (HPSEN).
Go to "990—Transfer Drum Encoder Sensor
(HPSEN) Service Check" on page
2-56.
2-58.
2-60.
Diagnostic Information
2-61.
2-7