• Code: C8230
• Description: DF staple motor error 1
• Causes: The DF staple jam was detected 2 times continuously.(Detection condition of 2nd paper jam: The home position cannot be detected after passing 600ms since starting up the motor.)
• Remedy: 1 Checking the DF staple unit The DF staple unit is not assembled properly. If the DF staple cannot operate manually without paper jam, repair the part that restricts the DF staple. 2 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wire when it has no continuity.• DF staple unit - DF main PWB Electrical Diagram of PWBs 3 Replacing the DF staple unit The DF staple unit is faulty. Replace the DF staple unit. DF Staple Unit Replacement 4 Replacing the DF main PWB The DF main PWB is faulty. Replace the DF main PWB. DF Main PWB Replacement

• Code: C8250
• Description: DF main tray error 4 Object: 1000-sheet finisher
• Causes: The lock-up signal was 0.7V or less for 10s continuously during the DF tray motor operation.
• Remedy: 1 Checking the DF tray The DF tray is not assembled properly. If the DF tray is not shifted manually vertically, repair the part that restricts the operation. 2 Checking the DF tray drive components The DF tray drive components are not properly attached, or they are faulty. Reattach the DF tray drive components. Replace them if they are not fixed. 3 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wires there is no continuity.• DF tray motor - DF main PWB• DF tray sensor 4 - DF main PWBOr, • DF tray sensor 5 (with the folding unit) - DF main PWB Electrical Diagram of PWBs 4 Replacing the DF tray motor The DF tray motor is faulty. Replace the DF tray motor if it does not operate properly when checking the operation at U240. U240 Execution 5 Replacing the DF main PWB The DF main PWB is faulty. Replace the DF main PWB. DF Main PWB Replacement

• Code: C8260
• Description: DF middle motor HP detection error
• Causes: J790X (Middle paddle jam) was detected 2 times continuously.
• Remedy: 1 Checking the DF paddle drive components The DF paddle drive components are not properly attached, or it is faulty. Reattach or replace the DF paddle drive components. 2 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wires if there is no continuity.• DF middle motor - DF main PWB• DF paddle sensor - DF main PWB Electrical Diagram of PWBs 3 Replacing the DF middle motor The DF middle motor is faulty. Replace the DF middle motor if it does not operate properly when checking the operation at U240. U240 Execution 4 Checking the DF paddle sensor The DF paddle sensor is not properly attached, or it is faulty. Reattach the DF paddle sensor and execute U241 to check the operation.If it does not operate properly, replace the sensor. U241 Execution 5 Replacing the DF main PWB The DF main PWB is faulty. Replace the DF main PWB. DF Main PWB Replacement

• Code: C8300
• Description: Main program error / BF unit communication error Object: 4000-sheet finisher with the folding unit
• Causes: The communication could not succeed after confirming the connection with the BF unit.
• Remedy: 1 Checking the BF set switch The BF set switch is not properly attached. Reattach the BF set switch. 2 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wire when it has no continuity.• BF main PWB - DF main PWB Electrical Diagram of PWBs 3 Replacing the BF set switch The BF set switch is faulty. Replace the BF set switch if it does not operate properly when checking the operation at U241. U241 Execution 4 Replacing the BF main PWB The BF main PWB is faulty. Replace the BF main PWB. 5 Replacing the DF main PWB The DF main PWB is faulty. Replace the DF main PWB. DF Main PWB Replacement

• Code: C8310
• Description: BF side registration motor 2 error Object: 4000-sheet finisher with the folding unit
• Causes: BF side registration sensor 2 does not turn on after passing 1s during the initial operation.
• Remedy: 1 Checking the upper BF side registration guide The upper BF side registration guide is not assembled properly. If the upper BF side registration guide is not shifted manually back and forth, repair the part that restricts the operation. 2 Checking the upper BF side registration guide drive components The BF side registration upper guide drive components are not properly attached, or they are faulty. Reattach the upper BF side registration guide drive components. Then, replace them if they are not fixed. 3 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wires if there is no continuity.• BF side registration motor 2 - BF main PWB• BF side registration sensor 2 - BF main PWB Electrical Diagram of PWBs 4 Replacing BF side registration motor 2 BF side registration motor 2 is faulty. Replace BF side registration motor 2 if it does not operate properly when checking the operation at U240. U240 Execution 5 Checking BF side registration sensor 2 BF side registration sensor 2 is not properly attached, or it is faulty. Reattach BF side registration sensor 2 and execute U241 to check the operation.If it does not operate properly, replace the sensor. U241 Execution 6 Replacing the BF main PWB The BF main PWB is faulty. Replace the BF main PWB.

• Code: C8320
• Description: BF adjustment motor error Object: 4000-sheet finisher with the folding unit
• Causes: At the initialization, turning on of the BF adjustment sensor is not detected after 2.5s passes.
• Remedy: 1 Checking the BF shift belt The BF shift belt is not assembled properly. If the BF shift belt is not operated manually, repair the part that restricts the operation. 2 Checking the BF shift belt drive components The BF shift belt drive components are not properly attached, or they are faulty. Reattach the BF shift belt drive components. If the belt comes off, reattach it.When they are not fixed, replace them if they are not fixed. 3 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wires when they have no continuity.• BF adjustment motors 1, 2 - BF main PWB• BF adjustment sensors 1, 2 - BF main PWB Electrical Diagram of PWBs 4 Replacing BF adjustment motors 1, 2 BF adjustment motors 1, 2 are faulty. Replace BF adjustment motors 1, 2 if they do not operate properly when checking the operation at U240. U240 Execution 5 Checking BF adjustment sensors 1, 2 BF adjustment sensors 1, 2 are not properly attached, or they are faulty. Reattach BF adjustment sensors 1, 2 and execute U241 to check the operation. If they do not properly operate, replace the sensors. U241 Execution 6 Replacing the BF main PWB The BF main PWB is faulty. Replace the BF main PWB.

• Code: C8330
• Description: BF blade motor error Object: 4000-sheet finisher with the folding unit
• Causes: The BF blade sensor does not turn on after passing 3s during the initial operation.
• Remedy: 1 Checking the BF blade The BF blade is not assembled properly. If the BF blade is not operated manually, repair the part that restricts the operation. 2 Checking the BF blade drive components The BF blade drive components are not properly attached, or they are faulty. Reattach the BF blade drive components.Then, replace them if they are not fixed. 3 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wires there is no continuity.• BF blade motor - BF main PWB• BF blade sensor - BF main PWB Electrical Diagram of PWBs 4 Replacing the BF blade motor The BF blade motor is faulty. Replace the BF blade motor if it does not operate properly when checking the operation at U240. U240 Execution 5 Checking the BF blade sensor The BF blade sensor is not properly attached. Reattach the BF blade sensor and execute U241 to check the operation.Then, replace the BF blade sensor if it does not operate properly. U241 Execution 6 Replacing the BF main PWB The BF main PWB is faulty. Replace the BF main PWB.

• Code: C8340
• Description: BF staple motor error 1 Object: 4000-sheet finisher with the folding unit
• Causes: The BF staple jam was detected 2 times continuously.(Detection condition of 2nd paper jam: The home position cannot be detected after passing 600ms since starting up the motor.)
• Remedy: 1 Checking the BF staple unit The BF staple unit is not assembled properly. If the BF staple unit is not operated manually, repair the part that restricts the operation. 2 Checking the BF staple unit drive components The BF staple unit drive components are not properly attached, or they are faulty. Reattach the BF staple unit drive components. Then, replace them if they are not fixed. 3 Checking the wire The wire is not properly connected or is faulty. Reinsert the following wire connectors, and replace the wire when it has no continuity.• BF staple unit - BF main PWB Electrical Diagram of PWBs 4 Replacing the BF staple motor The BF staple motor is faulty. Replace the BF staple motor if it does not operate properly when checking the operation at U240. U240 Execution 5 Replacing the BF staple unit The BF staple unit is faulty. Replace the BF staple unit. 6 Replacing the BF main PWB The BF main PWB is faulty. Replace the BF main PWB.