Lexmark C 746 Service Manual

Diagnostic information2-85
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244.03, 244.11—Paper Jam service check
244.05—Paper Jam service check
Step Questions / actions Yes No
11. Bring the printer up in Diagnostics Menu 
(turn off the printer, press and hold 
buttons 3 and 6, then turn on the printer).
2. Navigate to PRINT TESTS > select a tray 
below tray 4 > Single.
Did the page print correctly?Problem resolved. Go to step 2.
2Is tray 4 a high-capacity input option (2,000-
sheet feeder)?Replace the HCIT top 
plate. See...

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244.10—Paper Jam service check
244.17—Paper Jam service check
41. Carefully lift the printer off the option, and 
lay the printer on its back.
2. Check the option connector for damage.
Is the connector damaged?Replace the option cable. 
See “Option cable 
removal” on page 4-135. Go to step 5.
5Is tray 4 a high-capacity input option (2,000-
sheet feeder)?Go to step 7. Go to step 6.
6Replace the complete tray 4 option.
Does the error clear?Problem resolved....

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244.26—Paper Jam service check
21. Turn the printer off.
2. Remove the rear frame cover. See “Rear 
frame cover removal” on page 4-47.
3. Remove the right cover. See “Right 
cover removal” on page 4-51.
4. Check the connector in JOPT1 for proper 
connections to the system board, the 
cable for pinch points, and the cable or 
connector for any other damage.
Is the cable damaged?Replace the option cable. 
See “Option cable 
removal” on page 4-135. Go...

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244.27—Paper Jam service check
244.29—Paper Jam service check
2Is tray 5 a high-capacity input tray (2,000-
sheet feeder)?Replace the HCIT top 
plate. See “Top plate 
assembly removal” on 
page 4-206. Replace the complete 
tray 5 option.
Step Questions / actions Yes No
11. Bring the printer up in Diagnostics Menu 
(turn off the printer, press and hold 
buttons 3 and 6, then turn on the printer).
2. Navigate to PRINT TESTS > select a tray 
below tray 4 >...

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245.02—Paper Jam service check
Step Questions / actions Yes No
1Has paper been fed from an input option 
before?Go to step 4. Go to step 2.
21. Turn the printer off.
2. Remove the rear frame cover. See “Rear 
frame cover removal” on page 4-47.
3. Remove the right cover. See “Right 
cover removal” on page 4-51.
4. Check the connector JOPT1 for proper 
connection to the system board, the cable 
for pinch points, and the cable or 
connector for any...

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245.03, 245.11—Paper Jam service check
245.05—Paper Jam service check
Step Questions / actions Yes No
11. ring the printer up in Diagnostics Menu 
(turn the multifunction printer off, press 
and hold 3 and 6, turn the MFP on, and 
then release the buttons when the 
progress bar displays). 
2. Navigate to PRINT TESTS > select a tray 
below tray 3 > Single.
Did the page print correctly?Problem resolved. Go to step 2.
2Is tray 5 a high-capacity input option...

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245.10—Paper Jam service check
4Carefully lift the printer off the option, and lay 
the printer on its back.
Check the option connector for damage.
Is the connector damaged?Replace the option cable. 
See “Option cable 
removal” on page 4-135. Go to step 5.
5Is tray 4 a high-capacity input option (2,000-
sheet feeder)?Go to step 7. Got to step 6.
6Replace the complete tray 5 option.
Does the error clear?Problem resolved. Replace the system board. 
See...

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245.17—Paper Jam service check
Step Questions / actions Yes No
1Has paper been fed from an input option 
before?Go to step 4. Go to step 2.
21. Turn the printer off.
2. Remove the rear frame cover. See “Rear 
frame cover removal” on page 4-47.
3. Remove the right cover. See “Right 
cover removal” on page 4-51.
4. Check the connector JOPT1 for proper 
connection to the system board, the cable 
for pinch points, and the cable or 
connector for any other...

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245.29—Paper Jam service check
900.00–900.99 (except 900.05)—System software error service check
There are different types of 900.xx errors that can occur. There may be a communication problem (Bad cable, 
network connection, and so on) software issue, or a hardware problem with the controller board, or ISP (Internal 
solutions port). The communication and software aspects should be checked first. Determine if the problem is 
constant or...

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6Print the following:
•Error log
• Menu settings page
• Network settings page
Does the 900.xx error reoccur while these pages 
were printing?Go to step 31. Go to step 7.
7Re-attach the communications cable. Restart the 
printer to operating mode. Send the printer a print job. 
Does the 900.xx error reoccur?
Note: Before performing this step, write down this 
information about the file being sent to the printer:
• Application used
• Operating system
• Driver...