Lexmark C77x Service Manual page 133

C77/c78 series
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Printer does not recognize that one or more output options as being installed.
Step
Actions and questions
1
Excessive static electricity buildup—Check the output
expander control board cover to make sure the ESD
brush ground lead is firmly attached to the output
expander frame. Make sure the ESD brush is not loose
or damaged.
is the ESD brush ground cable correctly installed and
the ESD brush not loose or broken?
2
Output expander assembly mechanical linkage
(cables)—Check the output expander autoconnect
cable and connector for any signs of damage,
especially the connector pins.
Are there any signs of damage to the cable, connector,
or connector pins?
3
Output expander assembly mechanical linkage
(electrical)—Check the cables at J1A, J1B, J2A, and
J2B on the control board to make sure they are
attached securely and correctly.
Are the cables attached securely and correctly?
4
Voltage check, base printer autoconnect connector—
Turn the power off, remove the output expander option
from the printer, and check the voltages on the base
printer top autoconnect connector. Go to
"Connectors" on page
Are the voltages correct?
5
Voltage check, output expander system board—
Reinstall the output expander option, and check the
voltages at J1A and J1B on the connector.
Are the voltages correct?
Remove Paper—
Output Bin x
message.
Step
Actions and questions
1
Output sensor flag check—Check the flag for correct
operation, binds, broken parts, or interference from the
sensor cable.
Is there a problem with the sensor flag?
2
Output bin sensor—Run the sensor test to check the
Output bin sensor for correct operation.
Does the sensor operate correctly?
5-7.
is displayed, POST is incomplete unable to clear the
Yes
No
Go to step 2
1. Attach the
ground cable if
not installed
correctly.
2. Replace the
cover assembly if
the ESD brush is
loose or
damaged.
Replace the
Go to step 3
autoconnect
cable.
Go to step 4
Reseat the
cables.
Go to step 5
The problem is in
the base printer.
Check
autoconnects in
the printer.
Replace the
Replace the
output expander
output expander
option system
option
board.
mechanical
linkage
assembly.
Yes
No
Replace the flag
Go to step 2
or repair as
necessary.
Contact your next
Replace the
level of support.
sensor assembly.
If this does not fix
the problem,
replace the
"System board
removal" on
page
Diagnostic information
5061
4-89.
2-91

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C76xC780nC78xC770nC772nC782n

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