• Code: C7970
• Description: Weight sensor error The condition of the sensor output value was less than the specified value continued for 500ms.
• Remedy: 1 Reinstalling the waste toner box The waste toner box is not properly installed. Reinstall the waste toner box into the main unit slowly, and then check if it moves vertically. Replacing the Waste Toner Box (Operation Guide - Section 10) 2 Checking the wire The relay connector (engine PWB and waste toner motor/ weight sensor) is not connected properly or disconnected as excessive tensioning of the wire located at the back side of the waste toner box unit during maintenance work. Realign the wire so that the wire of the relay connector at the waste toner box unit backside is not excessively strained. Then, reconnect the relay connector. Connection of Relay Connector of Waste Toner Box Unit (Section 4 "Detaching and reattaching waste toner box unit) 3 Checking the weight sensor and the actuator The connector is not properly connected. Or, the actuator is not attached properly. Reconnect the connector of the weight sensor. And, correct the actuator position. 4 Checking the spring for the weight sensor The spring of the weight sensor is not attached properly. Reattach the spring for the weight sensor located under the waste toner box unit. 5 Cleaning around the weight sensor The weight sensor and surrounding parts are dirty. Clean around the weight sensor with an air-blower. 6 Executing U155 The calibration of the weight sensor is not executed properly. Execute the waste toner calibration at U155. Maintenanc e Mode List 7 Replacing the waste toner box The waste toner box is faulty. Replace the waste toner box. Replacing the Waste Toner Box (Operation Guide - Section 10) 8 Firmware upgrade The engine firmware is faulty. Upgrade the engine firmware to the latest version Firmware Update 9 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Detaching and reattaching the Engine PWB

• Code: C7980
• Description: Waste toner overflow (Waste toner full sensor error) The waste toner full sensor detected full (lock) of the waste toner box for 4 times continuously.
• Remedy: 1 Checking the waste toner box The waste toner box is full. Replace the waste toner box if it is full. Replacing the Waste Toner Box (Operation Guide - Section 10) 2 Checking the waste toner full sensor The connector is not properly connected. Reconnect the connector of the waste toner full sensor. 3 Cleaning the waste toner box joint section The waste toner is clogged at the waste toner joint section. Clean inside the waste toner box joint section of the main drive unit. Detaching and reattaching the Main Drive Unit 4 Checking the connection The waste toner box joint section and the waste toner box are not properly connected. Realign the wire so that the wire of the relay connector at the waste toner box unit backside is not excessively strained. Then, reconnect the relay connector. After that, reinstall the waste toner box into the main unit. Connection of Relay Connector of Waste Toner Box Unit (Section 4 "Detaching and reattaching waste toner box unit) 5 Firmware upgrade The engine firmware is faulty. Upgrade the engine firmware to the latest version Firmware Update 6 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. . Feed image PWB - Feed drive PWB Section 8 "PWBs" 7 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB. 8 Replacing the feed drive PWB The feed drive PWB is faulty. Replace the feed drive PWB.

• Code: C8010
• Description: PH motor error 1 Object: 1000-sheet finisher, 4000-sheet finisher (When punch unit is installed) 1. The PH home position sensor does not turn on even 200ms passed when the PH motor drives. 2. The pulse plate does not count the specified pulse even 300ms passed after the punch operation was started. 3. After correction operation starts, the punch unit does not stop at 2-pulse position from the PH home position sensor turning on within 500ms. (If the PH home position sensor turns on, the processing finishes normally.)
• Remedy: 1 Checking the punch unit The punch unit is not assembled properly. If the punch unit does not move manually, repair the position where restricts the operation. 2 Checking the PH cam drive parts The PH cam drive parts are not attached properly, or faulty. Reattach the punch cam drive parts. If not repaired, replace them. 3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. . PH motor - PH PWB . PH home position sensor - PH PWB . PH PWB - DF PWB Section 8 "PWBs" 4 Replacing the PH motor The PH motor is faulty. Execute U240 [Motor] > [Punch]. If the PH motor does not operate properly, replace it. Maintenanc e Mode List 5 Checking the PH home position sensor The PH home position sensor is not properly attached, or it is faulty. Execute U241 [Punch] > [Punch HP]. If the PH home position sensor does not operate properly, reattach it. If not repaired, replace it. Maintenanc e Mode List 6 Firmware upgrade The firmware is not the latest version. Upgrade the PH firmware to the latest version. Firmware Update 7 Replacing the PH PWB The PH PWB is faulty. Replace the PH PWB. Detaching and reattaching the PH PWB (PH- 7A/C/D Installation Guide) 8 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB. Detaching and reattaching the DF PWB

• Code: C8020
• Description: PH motor error 2 Object: 1000-sheet finisher, 4000-sheet finisher (When punch unit is installed) The positioning alignment of the home position is not completed within 3s when initializing or waiting the home position.
• Remedy: 1 Checking the punch unit The punch unit is not assembled properly. If the punch unit does not move manually, repair the position where restricts the operation. 2 Checking the PH cam drive parts The PH cam drive parts are not attached properly, or faulty. Reattach the PH cam drive parts. If not repaired, replace them. 3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. . PH motor - PH PWB . PH PWB - DF PWB Section 8 "PWBs" 4 Replacing the PH motor The PH motor is faulty. Execute U240 [Motor] > [Punch]. If the PH motor does not operate properly, replace it. Maintenanc e Mode List 5 Firmware upgrade The firmware is not the latest version. Upgrade the PH firmware to the latest version. Firmware Update 6 Replacing the PH PWB The PH PWB is faulty. Replace the PH PWB. Detaching and reattaching the PH PWB (PH- 7A/C/D Installation Guide) 7 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB. Detaching and reattaching the DF PWB

• Code: C8030
• Description: PH motor error 3 Object: 1000-sheet finisher, 4000-sheet finisher (When punch unit is installed) The home position detection does not turn off within 50ms when initializing the home position.
• Remedy: 1 Checking the punch unit The punch unit is not assembled properly. If the punch unit does not move manually, repair the position where restricts the operation. 2 Checking the PH cam drive parts The PH cam drive parts are not attached properly, or faulty. Reattach the PH cam drive parts. If not repaired, replace them. 3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. . PH motor - PH PWB . PH PWB - DF PWB Section 8 "PWBs" 4 Replacing the PH motor The PH motor is faulty. Execute U240 [Motor] > [Punch]. If the PH motor does not operate properly, replace it. Maintenanc e Mode List 5 Firmware upgrade The firmware is not the latest version. Upgrade the PH firmware to the latest version. Firmware Update 6 Replacing the PH PWB The PH PWB is faulty. Replace the PH PWB. Detaching and reattaching the PH PWB (PH- 7A/C/D Installation Guide) 7 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB. Detaching and reattaching the DF PWB

• Code: C8090
• Description: DF paddle motor error Object: 1000-sheet finisher, 4000-sheet finisher 1. The DF paddle sensor does not turn on even 1s passed when the DF paddle motor drives. 2. The DF paddle sensor does not turn off even if it drives for 1s from on condition.
• Remedy: 1 Checking the DF paddle drive parts The DF paddle drive parts are not properly attached, or it is faulty. Reattach the DF paddle drive parts. If not repaired, replace them. 2 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. . DF paddle motor - DF PWB . DF paddle sensor - DF PWB Section 8 "PWBs" 3 Replacing the DF paddle motor The DF paddle motor is faulty. Execute U240 [Motor] > [Beat]. If the DF paddle motor does not operate properly, replace it. Maintenanc e Mode List 4 Replacing the DF paddle sensor The DF paddle sensor is faulty. Execute U241 [Finisher] > [Lead Paddle]. If the DF paddle sensor does not operate properly, replace it. Maintenanc e Mode List 5 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB. Detaching and reattaching the DF PWB

• Code: C8100
• Description: DF eject release motor error Object: 1000-sheet finisher, 4000-sheet finisher 1. The DF bundle exit sensor does not turn on even 1s passed when the DF exit release motor drives. 2. The DF bundle exit sensor does not turn off even if drives for 1s from on condition.
• Remedy: 1 Checking the DF bundle exit unit The eject guide in the DF bundle exit unit is deformed. Repair the DF bundle exit unit. 2 Checking the DF bundle exit unit drive parts The DF bundle exit unit drive parts are not properly attached, or they are faulty. Reattach the DF bundle exit unit drive parts. If not repaired, replace them. 3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. . DF exit release motor - DF PWB . DF bundle exit sensor - DF PWB Section 8 "PWBs" 4 Replacing the DF eject release motor The DF eject release motor is faulty. Execute U240 [Motor] > [Eject Unlock(HP)]. If the DF exit release motor does not operate properly, replace it. Maintenanc e Mode List 5 Checking the DF bundle exit sensor The DF bundle exit sensor is not attached properly or faulty. Reattach the DF bundle exit sensor, then check the sensor operation by executing U241. If the DF bundle exit sensor does not operate properly, replace it. Maintenanc e Mode List 6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB. Detaching and reattaching the DF PWB

• Code: C8110
• Description: DF shift motor 1 error Object: 4000-sheet finisher DF shift sensor 1 does not turn on even if shifting 160mm when driving DF shift motor 1.
• Remedy: 1 Checking the front shift guide The front shift guide is not assembled properly. If the front shift guide does not move manually, repair the position where restricts the operation. 2 Checking the front shift guide drive parts The front shift guide drive parts are not properly attached, or they are faulty. Reattach the front shift guide drive parts. If not repaired, replace them. 3 Checking the connection The connector is not connected properly, or the wire is faulty. Clean the terminal of the following wire connectors and reconnect the connectors. If there is no continuity, replace the wire. . DF shift motor 1 - DF PWB . DF shift sensor 1 - DF PWB Section 8 "PWBs" 4 Replacing DF shift motor 1 DF shift motor 1 is faulty. Replace DF shift motor 1 if it does not operate properly when checking the operation at U240. Maintenanc e Mode List 5 Checking DF shift sensor 1 DF shift sensor 1 is not properly attached, or it is faulty. Reattach DF shift sensor 1, then execute U241 [Finisher] > [Shift Front HP]. If DF shift sensor 1 does not operate properly, replace it. Maintenanc e Mode List 6 Replacing the DF PWB The DF PWB is faulty. Replace the DF PWB. Detaching and reattaching the DF PWB