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

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Diagnostic information
2-61
5060-00 x
154 Error code
ITU belt motor
Step Action and questions Yes No
1 Connector J64 on the engine board—check for correct
installation of the ITU drive motor cable from the ITU
drive motor to the engine board connector J64.
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 J64 on the engine board. The voltages
are approximately values.
Voltages 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 engine
board. 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 support Replace the ITU
motor drive
assembly
Connector pin Voltages (motor not running)
J64-2 +4.2 V dc
J64-4 +5.0 V dc
J64-6 +3.3 V dc
J64-8 +24 V dc
J64-10 Ground
J64-12 0 V dc
J64-14 +3.3 V dc