Lexmark C 746 Service Manual

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146.xx, 148.xx—Motor (MPF/duplex) error service check
Step Questions / actions Yes No
11. Open the rear frame cover.
2. Reseat JDX1 cable.
Does the problem persist?Go to step 2. Problem resolved.
21. Remove the tray.
2. Check the MPF/duplex gear for any 
damage.
3. Check if the MPF/duplex gear can engage 
the duplex drive gear.
4. Manually turn the gear and check for any 
damage.
Does the error still exist?Replace the MPF/duplex 
gear. See...

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51. Disconnect the MPF motor cable on the 
motor side.
2. Connect a new motor from outside of the 
machine.
3. Bring the printer up in Diagnostics Menu 
(Turn off the printer, press and hold 
buttons 3 and 6, then turn on the printer).
4. Navigate to MOTOR TESTS > Duplex > 
Forward or Reverse.
Note: Perform this test for 5 to 10 
seconds only.
5. Navigate to MOTOR TESTS > MPF Test> 
Forward or Reverse.
Note: Perform this test for 5 to 10 
seconds only.
6....

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147.xx, 920.01—POST (power-on self test) aligner error service check
91. Check the MPF tray for any damage.
2. Manually turn the MPF gear on the tray, 
and check if the MPF pick arm assembly 
would turn.
3. Bring the printer up in Diagnostics Menu 
(Turn off the printer, press and hold 
buttons 3 and 6, then turn on the printer).
4. Lift the MPF pick arm using the lever.
5. Select MOTOR TESTS > MPF > 
Forward.
6. Check if the pick arm would turn.
Is...

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155.xx—Cam motor error service check
Step Questions / actions Yes No
11. Turn the printer off.
2. Remove the rear frame cover. See “Rear 
frame cover removal” on page 4-47.
3. Check the motor driver cable in connector 
JDVR1 on the system board for proper 
connection, for cable pinch points, and for 
any other damage to the cable or 
connector.
Is the cable damaged?Replace the motor driver 
cable. See “Motor driver 
cable removal” on 
page 4-122.Go to step...

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5Visually inspect the motor driver card.
Is the motor driver card damaged?Replace the motor driver 
card. See “Motor driver 
card removal” on 
page 4-121.Go to step 6. 
61. Connect a new motor driver card without 
mounting it to the printer.
2. Bring the printer up in Diagnostics Menu 
(turn off the printer, press and hold 
buttons 3 and 6, then turn on the printer).
3. Navigate to MOTOR TESTS > CAM.
Did the motor run?Install the new motor driver...

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156.xx—COD (Color On Demand) motor service check
160.xx, 161.xx—Motor Error (option tray 2) service check
Step Questions / actions Yes No
11. Turn the printer off.
2. Remove the rear frame cover. See “Rear 
frame cover removal” on page 4-47.
3. Check the cable in connector JBOR1 on 
the system board for proper connection, 
for cable pinch points, and for any other 
damage to the cable or connector.
Is the cable damaged?Replace the COD 
assembly. See “Color...

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162.xx, 163.xx—Motor Error (option tray 3) service check
3Remove the right cover. See “Right cover 
removal” on page 4-51.
Check the option cable for pinch points and 
any damage.
Is the cable damaged?Replace the option cable. 
See “Option cable 
removal” on page 4-135. Go to step 4.
4Is the option tray 2 the high-capacity input tray 
(2,000-sheet feeder)?Replace the HCIT top plate 
assembly. See “Top plate 
assembly removal” on 
page 4-206.Replace...

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164.xx, 165.xx—Motor Error (option tray 4) service check
51. Turn the printer off.
2. Remove the rear frame cover. See “Rear 
frame cover removal” on page 4-47. 
3. Check the option cable in connector 
JOPT1 on the system board for proper 
connection, for cable pinch points, and for 
any other damage to the cable or 
connector.
4. Remove the right cover. See “Right 
cover removal” on page 4-51,
5. Check the option cable for pinch points 
and any damage.
6....

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166.xx, 167.xx—Motor Error (option tray 5) service check
4Is the option tray 4 the high-capacity input tray 
(2,000-sheet feeder)?Replace the HCIT top plate 
assembly. See “Top plate 
assembly removal” on 
page 4-206.Replace the option tray 4 
assembly. 
Step Questions / actions Yes No
11. Turn the printer off.
2. Reseat option tray 5.
3. Bring the printer up in Diagnostics Menu 
(turn off the printer, press and hold 
buttons 3 and 6, then turn on...

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168.xx—Motor (HCIT elevator) error service check
200.11, 250.03—Paper Jam error service check
Step Questions / actions Yes No
1Is the paper properly loaded in the high-
capacity input tray (HCIT)?Go to step 2. Fan the media, and then 
stack flat in the HCIT 
drawer.
21. Turn the printer off.
2. Reseat option the HCIT option.
3. Bring the printer up in Diagnostics Menu 
(turn off the printer, press and hold 
buttons 3 and 6, then turn on the printer). 
4....