• Code: C5101
• Description: Main high voltage error K 1. The flowing current when Vpp is varied in three stages during Vpp adjustment is measured and the difference between the zero current value and the current value in the second step is equal to or less than the reference value. 2. Even if Vpp [C] is applied, the detected Idc is too small. (Less than 5uA)
• Remedy: 1 Reinstalling the main highvoltage PWB Proper current does not flow as the MC roller contact point of the main high voltage PWB is not properly contacted. Reinstall the main high-voltage PWB. Detaching and reattaching the Main High Voltage PWB 2 Checking the drum unit and the developer unit The drum or the drum screw is not rotated properly due to the excessive load. Check if the drum or the drum screw is rotated manually, and replace the drum unit if not rotated. Detaching and reattaching the Drum Unit 3 Replacing drum motor K Drum motor K is faulty. Replace drum motor K. 4 Checking the main charger unit Proper current does not flow as the foreign objects, etc. adheres to the high voltage contact point of the main charger unit. Clean the high-voltage contact of the main charger unit, and apply conductive grease to the roller shaft. Detaching and reattaching the Main Charger Unit 5 Main charger unit replacement Proper current does not flow as the high voltage contact point of the main charger unit is deformed or damaged. Replace the main charger unit and execute U930. Detaching and reattaching the Main Charger Unit Maintenanc e Mode List 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. . Main high voltage PWB - Engine PWB Section 8 "PWBs" 7 Replacing the main highvoltage PWB The main high-voltage PWB is faulty. Replace the main high-voltage PWB. Detaching and reattaching the Main High Voltage PWB 8 Firmware upgrade The firmware is not the latest version. 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: C5102
• Description: Main high-voltage error C When measuring the inflow electric current changing Vpp to 3 steps during the Vpp adjustment, the gap between the 0 electric current value and the 2nd electric current value is the standard value or less.
• Remedy: 1 Reinstalling the main highvoltage PWB Proper current does not flow as the MC roller contact point of the main high voltage PWB is not properly contacted. Reinstall the main high-voltage PWB. Detaching and reattaching the Main High Voltage PWB 2 Checking the drum unit and the developer unit The drum or the drum screw is not rotated properly due to the excessive load. Check if the drum or the drum screw is rotated manually, and replace the drum unit if not rotated. Detaching and reattaching the Drum Unit 3 Checking drum motor CMY Drum motor CMY does not rotate properly due to the excessive load. Replace drum motor CMY. 4 Checking the main charger unit Proper current does not flow as the foreign objects, etc. adheres to the high voltage contact point of the main charger unit. Clean the high-voltage contact of the main charger unit, and apply conductive grease to the roller shaft. Detaching and reattaching the Main Charger Unit 5 Main charger unit replacement Proper current does not flow as the high voltage contact point of the main charger unit is deformed or damaged. Replace the main charger unit and execute U930. Detaching and reattaching the Main Charger Unit Maintenanc e Mode List 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. . Main high voltage PWB - Engine PWB Section 8 "PWBs" 7 Replacing the main highvoltage PWB The main high-voltage PWB is faulty. Replace the main high-voltage PWB. Detaching and reattaching the Main High Voltage PWB 8 Firmware upgrade The firmware is not the latest version. 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: C5103
• Description: Main high-voltage error M When measuring the inflow electric current changing Vpp to 3 steps during the Vpp adjustment, the gap between the 0 electric current value and the 2nd electric current value is the standard value or less.
• Remedy: 1 Reinstalling the main highvoltage PWB Proper current does not flow as the MC roller contact point of the main high voltage PWB is not properly contacted. Reinstall the main high-voltage PWB. Detaching and reattaching the Main High Voltage PWB 2 Checking the drum unit and the developer unit The drum or the drum screw is not rotated properly due to the excessive load. Check if the drum or the drum screw is rotated manually, and replace the drum unit if not rotated. Detaching and reattaching the Drum Unit 3 Checking drum motor CMY Drum motor CMY does not rotate properly due to the excessive load. Replace drum motor CMY. 4 Checking the main charger unit Proper current does not flow as the foreign objects, etc. adheres to the high voltage contact point of the main charger unit. Clean the high-voltage contact of the main charger unit, and apply conductive grease to the roller shaft. Detaching and reattaching the Main Charger Unit 5 Main charger unit replacement Proper current does not flow as the high voltage contact point of the main charger unit is deformed or damaged. Replace the main charger unit and execute U930. Detaching and reattaching the Main Charger Unit Maintenanc e Mode List 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. . Main high voltage PWB - Engine PWB Section 8 "PWBs" 7 Replacing the main highvoltage PWB The main high-voltage PWB is faulty. Replace the main high-voltage PWB. Detaching and reattaching the Main High Voltage PWB 8 Firmware upgrade The firmware is not the latest version. 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: C5104
• Description: Main high-voltage error Y When measuring the inflow electric current changing Vpp to 3 steps during the Vpp adjustment, the gap between the 0 electric current value and the 2nd electric current value is the standard value or less.
• Remedy: 1 Reinstalling the main highvoltage PWB Proper current does not flow as the MC roller contact point of the main high voltage PWB is not properly contacted. Reinstall the main high-voltage PWB. Detaching and reattaching the Main High Voltage PWB 2 Checking the drum unit and the developer unit The drum or the drum screw is not rotated properly due to the excessive load. Check if the drum or the drum screw is rotated manually, and replace the drum unit if not rotated. Detaching and reattaching the Drum Unit 3 Checking drum motor CMY Drum motor CMY does not rotate properly due to the excessive load. Replace drum motor CMY. 4 Checking the main charger unit Proper current does not flow as the foreign objects, etc. adheres to the high voltage contact point of the main charger unit. Clean the high-voltage contact of the main charger unit, and apply conductive grease to the roller shaft. Detaching and reattaching the Main Charger Unit 5 Main charger unit replacement Proper current does not flow as the high voltage contact point of the main charger unit is deformed or damaged. Replace the main charger unit and execute U930. Detaching and reattaching the Main Charger Unit Maintenanc e Mode List 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. . Main high voltage PWB - Engine PWB Section 8 "PWBs" 7 Replacing the main highvoltage PWB The main high-voltage PWB is faulty. Replace the main high-voltage PWB. Detaching and reattaching the Main High Voltage PWB 8 Firmware upgrade The firmware is not the latest version. 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: C5131
• Description: Primary transfer high-voltage error K When adjusting the feedback, the detected electric current value exceeds the upper limit or is less than the lower limit, or the adjustment result is 300V or less or is 2,900V or more.
• Remedy: 1 Checking the developer K/ transfer belt motor The developer K/transfer belt motor is faulty. Execute U030 [DLP(K)] to check the developer K/transfer belt motor operation. If the developer K/transfer belt motor does not operate properly, reattach it and reconnect the connector. If not repaired, replace it. Maintenanc e Mode List 2 Reinstalling the primary transfer unit The primary transfer unit is not properly installed. Reinstall the primary transfer unit so that the high-voltage contacts of the primary transfer roller firmly connect. Detaching and reattaching the Primary Transfer Unit 3 Primary transfer unit replacement The primary transfer belt does not properly rotate. Replace the primary transfer unit when the primary transfer belt does not rotate manually. Detaching and reattaching the Primary Transfer Unit 4 Checking the high-voltage contact Proper current does not flow as the foreign objects, etc. adheres to the high voltage contact point of the primary transfer roller. Clean the high-voltage contact of the primary transfer roller, and apply conductive grease to the roller shaft. 5 Reinstalling the transfer highvoltage PWB Proper current does not flow as high voltage contact of the transfer high voltage PWB is faulty. Reinstall the transfer highvoltage PWB. Detaching and reattaching the Transfer High Voltage PWB 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. . Transfer high voltage PWB - Engine PWB . Transfer high voltage PWB - Feed image PWB Section 8 "PWBs" 7 Replacing the transfer highvoltage PWB The transfer high-voltage PWB is faulty. Replace the transfer highvoltage PWB. Detaching and reattaching the Transfer High Voltage PWB 8 Firmware upgrade The firmware is not the latest version. 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 10 Checking the drum unit and the developer unit There is no grounding for the drum unit. Apply conductive grease on the drum drive shaft of the main drive unit. If the drum drive shaft does not contact with the earth plate inside of the drum, replace the drum unit. Detaching and reattaching the Main Drive Unit Detaching and reattaching the Drum Unit 11 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C5132
• Description: Primary transfer high-voltage error C When adjusting the feedback, the detected electric current value exceeds the upper limit or is less than the lower limit, or the adjustment result is 300V or less or is 2,900V or more.
• Remedy: 1 Checking the developer K/ transfer belt motor The developer K/transfer belt motor is faulty. Execute U030 [DLP(K)] to check the developer K/transfer belt motor operation. If the developer K/transfer belt motor does not operate properly, reattach it and reconnect the connector. If not repaired, replace it. Maintenanc e Mode List 2 Reinstalling the primary transfer unit The primary transfer unit is not properly installed. Reinstall the primary transfer unit so that the high-voltage contacts of the primary transfer roller firmly connect. Detaching and reattaching the Primary Transfer Unit 3 Primary transfer unit replacement The primary transfer belt does not properly rotate. Replace the primary transfer unit when the primary transfer belt does not rotate manually. Detaching and reattaching the Primary Transfer Unit 4 Checking the high-voltage contact Proper current does not flow as the foreign objects, etc. adheres to the high voltage contact point of the primary transfer roller. Clean the high-voltage contact of the primary transfer roller, and apply conductive grease to the roller shaft. 5 Reinstalling the transfer highvoltage PWB Proper current does not flow as high voltage contact of the transfer high voltage PWB is faulty. Reinstall the transfer highvoltage PWB. Detaching and reattaching the Transfer High Voltage PWB 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. . Transfer high voltage PWB - Engine PWB . Transfer high voltage PWB - Feed image PWB Section 8 "PWBs" 7 Replacing the transfer highvoltage PWB The transfer high-voltage PWB is faulty. Replace the transfer highvoltage PWB. Detaching and reattaching the Transfer High Voltage PWB 8 Firmware upgrade The firmware is not the latest version. 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 10 Checking the drum unit and the developer unit There is no grounding for the drum unit. Apply conductive grease on the drum drive shaft of the main drive unit. If the drum drive shaft does not contact with the earth plate inside of the drum, replace the drum unit. Detaching and reattaching the Main Drive Unit Detaching and reattaching the Drum Unit 11 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C5133
• Description: Primary transfer high-voltage error M When adjusting the feedback, the detected electric current value exceeds the upper limit or is less than the lower limit, or the adjustment result is 300V or less or is 2,900V or more.
• Remedy: 1 Checking the developer K/ transfer belt motor The developer K/transfer belt motor is faulty. Execute U030 [DLP(K)] to check the developer K/transfer belt motor operation. If the developer K/transfer belt motor does not operate properly, reattach it and reconnect the connector. If not repaired, replace it. Maintenanc e Mode List 2 Reinstalling the primary transfer unit The primary transfer unit is not properly installed. Reinstall the primary transfer unit so that the high-voltage contacts of the primary transfer roller firmly connect. Detaching and reattaching the Primary Transfer Unit 3 Primary transfer unit replacement The primary transfer belt does not properly rotate. Replace the primary transfer unit when the primary transfer belt does not rotate manually. Detaching and reattaching the Primary Transfer Unit 4 Checking the high-voltage contact Proper current does not flow as the foreign objects, etc. adheres to the high voltage contact point of the primary transfer roller. Clean the high-voltage contact of the primary transfer roller, and apply conductive grease to the roller shaft. 5 Reinstalling the transfer highvoltage PWB Proper current does not flow as high voltage contact of the transfer high voltage PWB is faulty. Reinstall the transfer highvoltage PWB. Detaching and reattaching the Transfer High Voltage PWB 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. . Transfer high voltage PWB - Engine PWB . Transfer high voltage PWB - Feed image PWB Section 8 "PWBs" 7 Replacing the transfer highvoltage PWB The transfer high-voltage PWB is faulty. Replace the transfer highvoltage PWB. Detaching and reattaching the Transfer High Voltage PWB 8 Firmware upgrade The firmware is not the latest version. 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 10 Checking the drum unit and the developer unit There is no grounding for the drum unit. Apply conductive grease on the drum drive shaft of the main drive unit. If the drum drive shaft does not contact with the earth plate inside of the drum, replace the drum unit. Detaching and reattaching the Main Drive Unit Detaching and reattaching the Drum Unit 11 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.

• Code: C5134
• Description: Primary transfer high-voltage error Y When adjusting the feedback, the detected electric current value exceeds the upper limit or is less than the lower limit, or the adjustment result is 300V or less or is 2,900V or more.
• Remedy: 1 Checking the developer K/ transfer belt motor The developer K/transfer belt motor is faulty. Execute U030 [DLP(K)] to check the developer K/transfer belt motor operation. If the developer K/transfer belt motor does not operate properly, reattach it and reconnect the connector. If not repaired, replace it. Maintenanc e Mode List 2 Reinstalling the primary transfer unit The primary transfer unit is not properly installed. Reinstall the primary transfer unit so that the high-voltage contacts of the primary transfer roller firmly connect. Detaching and reattaching the Primary Transfer Unit 3 Primary transfer unit replacement The primary transfer belt does not properly rotate. Replace the primary transfer unit when the primary transfer belt does not rotate manually. Detaching and reattaching the Primary Transfer Unit 4 Checking the high-voltage contact Proper current does not flow as the foreign objects, etc. adheres to the high voltage contact point of the primary transfer roller. Clean the high-voltage contact of the primary transfer roller, and apply conductive grease to the roller shaft. 5 Reinstalling the transfer highvoltage PWB Proper current does not flow as high voltage contact of the transfer high voltage PWB is faulty. Reinstall the transfer highvoltage PWB. Detaching and reattaching the Transfer High Voltage PWB 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. . Transfer high voltage PWB - Engine PWB . Transfer high voltage PWB - Feed image PWB Section 8 "PWBs" 7 Replacing the transfer highvoltage PWB The transfer high-voltage PWB is faulty. Replace the transfer highvoltage PWB. Detaching and reattaching the Transfer High Voltage PWB 8 Firmware upgrade The firmware is not the latest version. 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 10 Checking the drum unit and the developer unit There is no grounding for the drum unit. Apply conductive grease on the drum drive shaft of the main drive unit. If the drum drive shaft does not contact with the earth plate inside of the drum, replace the drum unit. Detaching and reattaching the Main Drive Unit Detaching and reattaching the Drum Unit 11 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB.