Lexmark CS748de - XX, 906.05-906.08, 920.01-POST (Power-On Self Test) Aligner Error Service Check

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147.xx, 906.05-906.08, 920.01—POST (power-on self test) aligner error service check
8
1. Check the front door assembly gears that
engages to the MPF/duplex gear for any
damage.
2. Close the front door assembly and open
the front door cover.
3. Check if the front door cover assembly
gears can engage the MPF/duplex gear.
4. Manually turn the gears.
5. Check the front door assembly for any
damage.
Is the front door assembly gear or the front
door assembly damaged?
Replace the front door
assembly. See “Front
door assembly removal”
on page 4-108.
Go to step 9.
9
1. 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 the MPF pick arm assembly free of
damage?
Go to step 10. Replace the input tray.
10
Remove the input tray and insert a new one.
Does this fix the problem?
Problem resolved. Replace the system board.
See “System board
removal” on page 4-163.
Step Questions / actions Yes No
1 1. Turn the printer off.
2. Remove the rear frame cover. See “Rear
frame cover removal” on page 4-47.
3. Check JFDPCK1 connector for proper
connection and damage.
4. Reseat the connector.
5. POR the printer.
6. Perform a print test.
Is the problem still present?
Go to step 2. Problem resolved.
2
Check the cable in the connector JFDPCK1
for pinch points and for any other damage to
the cable or connector.
Is the cable damaged?
Replace paper pick
mechanism. See “Paper
pick mechanism
assembly removal” on
page 4-145.
Go to step 3.
Step Questions / actions Yes No