Lexmark 13P0195 - C 750dn Color Laser Printer Service Manual page 169

Service manual
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No indication that Bin x is full or no indication that Bin x is near full.
Step
Actions and questions
1
Sensor cable installation—check for correct installation
of the sensor cable at J5 on the control board.
Is the cable installed correctly?
2
Dual output bin x sensor assembly
Do either the bin x full or the bin x near full sensor fail
the sensor test?
3
Voltage—check the voltages at J5-3 and J5-4. The
voltages should measure approximately +5 V dc.
Are the voltages correct?
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 is loose not or
damaged.
Is the ESD brush ground cable correctly installed and
the ESD brush not loose or broken?
2
Options check—If more than a single output expander
option is installed, check each one to see if the printer
recognizes any single option as being installed. If the
printer recognizes any of the output expander options
then the base printer autoconnect system is operating
correctly and the problem is in the unrecognized
expander option. Make sure that the output expander
option is the only output option that is not recognized
by the base printer.
Is this the only output option not recognized by the
base printer?
3
Output Expander assembly mechanical linkage
(cables)—Check the output expander autoconnect
cable and connector for any signs of damage,
especially the connector pins.
Is there any signs of damage to the cable, connector,
or connector pins?
4
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?
5
Voltage check, base printer autoconnect connector—
turn the power off and remove the output expander
option from the printer and check the voltages on the
base printer top autoconnect connector. Go to
Autoconnect - Top.
Are the voltages correct?
Yes
No
Go to step 2
Install the cable
correctly
Go to step 3
Call your next level
support
Replace the sensor
Replace the control
board
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.
Go to step 3
Go to the
autoconnect
system on the
Output Expander
option, base printer
and check cables
and connections to
the engine board
Replace the
Go to step 4
autoconnect cable
Go to step 5
Reseat the cables
Go to step 6
The problem is in
the base printer.
Check
autoconnects in
the printer.
Diagnostic information
5060-00x
2-135

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C750C750nC750dn

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