Lexmark C 746 Service Manual
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Diagnostic information2-75 5026 Go Back Previous Next 242.17—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 cable in connector JOPT1 for proper connection to the system board, cable pinch points, and any other damage to the cable or connector. Is the cable damaged?Replace the option cable. See “Option cable removal” on page 4-135. Go to step 3. 3Carefully lift the printer off the option, and lay the printer on its back. Check the option connector for damage. Is the option cable connector or cable damaged?Replace the option cable. See “Option cable removal” on page 4-135.Go to step 4. 4Is tray 2 an high-capacity input tray (HCIT)? Replace the HCIT top plate. See “Top plate assembly removal” on page 4-206.Replace the complete tray 2 option.
2-76Service Manual 5026 Go Back Previous Next 242.21, 243.21, 244.21. 245.21, 242.30, 243.30, 244.30, 245.30—Paper Jam service check 242.26—Paper Jam service check Step Questions / actions Yes No 11. Fan the media on the tray. • Use Tray 2 for 242.21 and 242.30 errors. • Use Tray 3 for 243.21 and 243.30 errors. • Use Tray 4 for 244.21 and 244.30 errors. • Use Tray 5 for 245.21 and 245.30 errors. 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 Print Test > Tray # > Single. Does the printer feed from tray 2 successfully?Problem resolved. Go to step 2. 21. Remove printer from the option tray. 2. Inspect the autonnect cables on the option tray. Is the autoconnect connector damaged?• For 550 input option, replace the 550 input option. • For HCIT input option, replace the HCIT top plate assembly. See “Top plate assembly removal” on page 4-206.Go to step 3. 3• For 550 input option, install a new 550 input option. • For HCIT input option, install a new top plate assembly. See “Top plate assembly removal” on page 4-206 Does this fix the problem?• For 550 input option, replace the 550 input option. • For HCIT input option, replace the HCIT top plate assembly. See “Top plate assembly removal” on page 4-206.Go to step 4. 4For HCIT input option, replace the HCIT controller board assembly. See “HCIT controller board assembly removal” on page 4-199. Does this fix the problem?Problem resolved Replace the system board. See “System board removal” on page 4-155. Step Questions / actions Yes No 11. Determine the input tray. 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 PRINT TESTS > select the tray you indicated > Single. Did the page feed correctly?Problem resolved. Go to step 2.
Diagnostic information2-77 5026 Go Back Previous Next 242.27—Paper Jam service check 242.29—Paper Jam service check 2Is the tray 3 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 3 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 the tray below tray 2 > Single. Did the page feed correctly?Problem resolved. Go to step 2. 21. Turn the printer off. 2. Open the front access door. 3. Turn the transport belt gear clockwise. Did the transport belt move?Go to step 3. Replace the transport belt. See “Transfer module removal” on page 4-171. 31. 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 MOTOR TESTS > Align Motor Test. Can you hear the align motor run?Replace the complete tray 2 option.Replace the paper pick mechanism. See “Paper pick mechanism assembly removal” on page 4-137. 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 > Tray 5 > Single. Did the page feed correctly?Problem resolved. Go to step 2. 2Is tray 2 a high-capacity input tray (2,000- sheet feeder)?Replace the HCIT elevator up sensor. See “HCIT elevator motor with sensor removal” on page 4-200. Replace the complete tray 2 option. Step Questions / actions Yes No
2-78Service Manual 5026 Go Back Previous Next 242.32, 243.32, 244.32, 245.32—Paper Jam service check 243.02—Paper Jam service check Step Questions / actions Yes No 11. Remove the input option tray. • Remove tray 2 for 242.32 errors. • Remove tray 3 for 243.32 errors. • Remove tray 4 for 244.32 errors. • Remove tray 5 for 245.32 errors. 2. Check for obstruction on the paper path. 3. Check the input option pass-through sensor flag for any damage. 4. Remove the input option from the printer and check the autoconnect connector for damage. Is the input option damaged?Replace the input option tray. If the input option is an HCIT, replace the HCIT top plate assembly. See “Top plate assembly removal” on page 4-206.Go to step 2. 21. 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 Test > Tray # > Single. Does the printer print correctly?Replace the system board. See “System board removal” on page 4-155.Go to step 3. 3• For 550 input option, try installing an new 550 input option. • For HCIT input option, install a new top plate assembly to verify the problem. Does this fix the problem?• For 550 input option, replace the 550 input option assembly. • For HCIT input option, replace the top plate assembly. See “Top plate assembly removal” on page 4-206.Go to step 4. 41. 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 damage. 5. Reseat JOPT1. 6. Carefully lift the printer off the options, and lay the printer on its back. 7. 7.Check the option connector for damage is the option cable connector damage?Replace the option cable. See “Option cable removal” on page 4-135.Replace the system board. See “System board removal” on page 4-155. Step Questions / actions Yes No 1Has paper been fed from an input option before?Go to step 4. Go to step 2.
Diagnostic information2-79 5026 Go Back Previous Next 243.03, 243.11—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 JOPT1 for proper connection 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 to step 3. 3Carefully 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 4. 4Replace the complete tray 3 option. Does the error clear?Problem resolved. Replace the system board. See “System board removal” on page 4-155. 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 3 > Single. Did the page print correctly?Problem resolved. Go to step 2. Step Questions / actions Yes No
2-80Service Manual 5026 Go Back Previous Next 243.05—Paper Jam service check 2Is tray 3 a high-capacity input option (2,000- sheet feeder)?Replace the HCIT top plate. See “Top plate assembly removal” on page 4-206.Replace the complete tray 3 option. Step Questions / actions Yes No 1Has paper been fed from an input option before?Go to step 5. Go to step 2. 21. 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 3 > Single. Did the page print correctly?Problem resolved. Go to step 3. 31. 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 at JOPT1 on the system board for proper connection, the cable for pinch points, and the cable or connector for any other damage. Is the cable damaged?Replace the option cable. Go to step 4. Step Questions / actions Yes No
Diagnostic information2-81 5026 Go Back Previous Next 243.10—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 3 a high-capacity input option (2,000- sheet feeder)?Go to step 7. Go to step 6. 6Replace the complete tray 3 option. Does the error clear?Problem resolved. Replace the system board. See “System board removal” on page 4-155. 7Replace the high-capacity input tray (2,000- sheet feeder)?Problem resolved. Replace the system board. See “System board removal” on page 4-155. 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 3 > Single. Did the page feed correctly?Problem resolved Replace the complete tray 3 option. Step Questions / actions Yes No
2-82Service Manual 5026 Go Back Previous Next 243.17—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 cable in connector JOPT1 for proper connection to the system board, cable pinch points, and any other damage to the cable or connector. Is the cable damaged?Replace the option cable. See “Option cable removal” on page 4-135. Go to step 3. 3Carefully lift the printer off the option, and lay the printer on its back. Check the option connector for damage. Is the option cable connector or cable damaged?Replace the option cable. See “Option cable removal” on page 4-135.Go to step 4. 4Is tray 3 an high-capacity input tray (HCIT)? Replace the HCIT top plate. See “Top plate assembly removal” on page 4-206.Replace the complete tray 3 option.
Diagnostic information2-83 5026 Go Back Previous Next 243.26—Paper Jam service check 243.27—Paper Jam service check 243.29—Paper Jam service check Step Questions / actions Yes No 11. Determine the input tray. 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 PRINT TESTS > select indicated input tray > Single. Did the page feed correctly?Problem resolved Go to step 2. 2Is tray 2 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 4 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 > Single. Did the page feed correctly?Problem resolved. Replace the complete tray 4 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 > Tray 3 > Single. Did the page feed correctly?Problem resolved. Go to step 2. 2Is tray 3 a high-capacity input tray (2,000- sheet feeder)?Replace the HCIT elevator- up sensor. See “HCIT elevator motor with sensor removal” on page 4-200.Replace the complete tray 3 option.
2-84Service Manual 5026 Go Back Previous Next 244.02—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 other damage. Is the cable damaged?Replace the option cable. See “Option cable removal” on page 4-135.Go to step 3. 31. Carefully lift the printer off the options, 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 4. 4Replace the complete tray 4 option. Does the error clear?Problem resolved. Replace the system board. See “System board removal” on page 4-155.