Lexmark 13P0150 - C 750dtn Color Laser Printer Service Manual page 78

271 Paper Jam - Check Bin X, Post Complete, first sheet of paper
feeds into Output Bin X.
Note: Before proceeding with this service check run the Output Bin X Sensor Test and
check for the failing sensor.
Step Actions and Questions
1
DC Motor Cable Connection - Check the DC motor
connector to make sure it is correctly installed at J4 on the
Output Expander Option Board.
Is the cable installed correctly?
2
DC Motor Mechanical Linkage Assembly - Check the
resistance of the motor on the cable connector. Check the
resistance between J4-1 and J4-2. The resistance
measures between 115 ohms and 135 ohms.
Is the resistance correct?
3
D.C. Motor Mechanical Linkage Assembly - Check for
continuity between J4-1 and J4-2 and the case of the motor.
It measures infinity.
Is there continuity between J4-1 or J4-2 and the case of the
motor?
Note: If the motor is shorted from either J4-1 or J4-2 and
the case of the motor, it may be necessary to replace the
output expander Control Board.
4
Output Expander Board - Disconnect the motor cable from
J4 and check the voltages at J4 on the board.
Note: All voltages are approximate values.
J4-1 (Motor Idle) +24 V dc
J4-2 (Motor Idle) +24 V dc
J4-5 (Motor Idle) +5 V dc
J4-6 (Motor Idle) +5 V dc
Note: Use caution not to short to adjacent pins on the
connector.
Are the voltages correct?
2-58
Service Manual
5060-XXX
Sensor Tests:
XNF=Near Full (Upper Part of sensor assembly)
F=Full (Lower part of sensor assembly)
P=Pass Thru Sensor
Yes No
Go to Step 2 Install the
cable correctly
Go to step 3 Replace the
DC Motor
Mechanical
Linkage
Assembly
Replace the Go to Step 4
DC Motor
Mechanical
Linkage
Assembly
Replace the Replace the
DC Motor Output
Mechanical Expander
Linkage Control Board
Assembly