Lexmark C77X, Service Manual

Page: 69 / 480

Diagnostic information
2-25
5061
148.xx error code service check
Step Actions and questions Yes No
1 Connector J16 on the system board—Check for
correct installation of the ITU drive motor cable from
the ITU drive motor to the system board connector J16.
Is the cable connected correctly?
Go to step 2 Install the cable
correctly.
2 ITU drive motor—Check for continuity between pin 4 of
CON1 on the motor drive card and the remaining pins
in the connector.
Do you measure continuity?
Note : The ITU drive motor can be removed from the
printer without removing the complete ITU drive motor
assembly. If the ITU drive motor assembly is removed
be careful not to spill toner that may be contained in
the auger system.
Replace the drive
motor. Go to step 3
3 ITU drive motor cable—Check the continuity of the ITU
drive motor cable.
Do you measure continuity?
Go to step 4 Replace the ITU
drive motor
cable.
4 ITU drive motor voltage check—Measure the voltage
on connector J16 on the system board. The voltages
are approximately values.
Voltages with motor not running
Are the voltages correct?
Replace the drive
motor. Go to step 5
5 ITU motor drive assembly—Remove the ITU
assembly. Manually turn the motor. The gears in the
ITU motor assembly, the second transfer roll gears,
and the cleaner gear should turn freely.
Do the gears turn freely?
Replace the
system board.
See
“System
board removal”
on page 4-90
. If
this does not fix
the problem,
replace the ITU
drive motor.
Go to step 6
6 ITU motor drive assembly—Remove the ITU drive
motor assembly. Manually turn the motor.
Do the gears on the ITU drive motor assembly turn
freely?
Contact your next
level of support. Replace the ITU
motor drive
assembly.
Connector pin Voltages (motor not running)
J16-2 +4.2 V dc
J16-4 +5.0 V dc
J16-6 +3.3 V dc
J16-8 +24 V dc
J16-10 Ground
J16-12 0 V dc
J16-14 +3.3 V dc