• Code: C1040
• Description: PF lift motor 2 error (Paper Feeder)
• Causes: [PF-7100 (Paper Feeder)]1. PF lift upper limit sensor 2 does not turn on after passing 16s since cassette 4 is inserted.2. The lock-up signal is not released for 300ms after turning on of PF lift motor 2.3. Since PF lift sensor 2 turned off during printing, PF lift upper limit sensor 2 does not turn on after passing 1s from the ascend control.[PF-7110 (Paper Deck)]1. PF lift upper limit sensor 2 does not turn on after passing 24s since cassette 4 is inserted.2. PF lift upper limit sensor 2 does not turn on after passing 3s from the ascend control when starting printing.
• Remedy: 1 Checking the cassette base The cassette base does not operate properly. Repair or replace the cassette base if it cannot move vertically. 2 Checking the drive gear The drive gear to lift up the cassette base does not rotate properly. Check if the lift motor drive gears to lift up the cassette base rotate smoothly or have no excessive load. And apply the grease to the frictional parts and repair the related parts so that they can rotate smoothly. 3 Checking the wire The wire is not properly connected. Reinsert the following wire connectors, and replace the wire when it has no continuity.• PF lift motor 2 - PF main PWB Electrical Diagram of PWBs 4 Replacing PF lift motor 2 PF lift motor 2 is faulty. Replace PF lift motor 2. 5 Checking the wire The wire is not properly connected. Reinsert the following wire connectors, and replace the wire when it has no continuity.• PF lift upper limit sensor 2 - PF main PWB Electrical Diagram of PWBs 6 Checking PF lift sensor 2 PF lift upper limit sensor 2 is not properly attached, or it is faulty. Reattach PF lift upper limit sensor 2. Then, replace it if it is not fixed. 7 Replacing the PF main PWB The PF main PWB is faulty. Replace the PF main PWB. PF Main PWB Replacement

• Code: C1140
• Description: PF lift motor error (Side Feeder)
• Causes: 1. The PF lift upper limit sensor does not turn on after passing 30s since cassette 5 was inserted.2. The lock signal is detected for 200ms continuously while the PF lift motor is operating.3. The PF lift upper limit sensor does not turn on for passing 2s from the ascending control during the printing.
• Remedy: 1 Checking the bottom plate The bottom plate does not operate properly. Repair or replace the bottom plate when it does not move vertically. ISU Replacement 2 Checking the drive gear The drive gear to lift up the bottom plate does not rotate properly. Check if the drive gears to lift up the bottom plate rotate smoothly or have no excessive load. And apply the grease to the frictional parts and fix the related parts so that they can rotate smoothly. ISU Replacement 3 Checking the wire The wire is not properly connected. Reinsert the following wire connectors, and replace the wire when it has no continuity.• PF lift motor - PF main PWB Electrical Diagram of PWBs 4 Checking the PF lift motor The PF lift motor is faulty. Replace the PF lift motor. 5 Checking the wire The wire is not properly connected. Reinsert the following wire connectors, and replace the wire when it has no continuity.• PF lift upper limit sensor - PF main PWB Electrical Diagram of PWBs 6 Checking the PF lift upper limit sensor The PF lift upper limit sensor is not properly attached, or it is faulty. Reattach the PF lift upper limit sensor. Then, replace it if it is not fixed. 7 Checking the PF main PWB The PF main PWB is faulty. Replace the PF main PWB. PF Main PWB Replacement

• Code: C1800
• Description: Paper Feeder communication error
• Causes: The communication error was detected 10 times continuously.
• Remedy: 1 Checking the connection The cable is not properly connected to the main unit. Reconnect the cable into the main unit. 2 Checking the wire The wire is not properly connected. Reinsert the following wire connectors, and replace the wire when it has no continuity.• PF main PWB - Engine PWB Electrical Diagram of PWBs 3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version Firmware Upgrade 4 Replacing the PF main PWB The PF main PWB is faulty. Replace the PF main PWB. PF Main PWB Replacement 5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Engine PWB Replacement

• Code: C1820
• Description: Paper Feeder communication error (Side Feeder)
• Causes: The communication error was detected 10 times continuously.
• Remedy: 1 Checking the connection It is not properly connected to the main unit. Reconnect to the main unit. 2 Checking the wire The wire is not properly connected. Reinsert the following wire connectors• PF main PWB - PF main PWB for the side feeder Electrical Diagram of PWBs 3 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version Firmware Upgrade 4 Checking the PF main PWB (Side Feeder) The PF main PWB (Side Feeder) is faulty. Replace the PF main PWB (Side Feeder). PF Main PWB Replacement (Side Feeder) 5 Replacing the PF main PWB The PF main PWB is faulty. Replace the PF main PWB. PF Main PWB Replacement 6 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Engine PWB Replacement

• Code: C1900
• Description: Paper Feeder EEPROM error
• Causes: The writing data and the reading data mismatch 3 times continuously when writing.
• Remedy: 1 Checking the connection It is not properly connected to the main unit. Reconnect the paper feeder into the main unit. Also, reconnect the wire connectors between the engine PWB and the PF main PWB. Electrical Diagram of PWBs 2 Checking the wire and the PF main PWB The wire or the PF main PWB is faulty. If the wires on the PF main PWB are pinched or have any damage, fix or replace the wires. When the issue is not resolved, replace the PF main PWB. PF Main PWB Replacement 3 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Engine PWB Replacement

• Code: C1920
• Description: Paper Feeder EEPROM error (Side Feeder)
• Causes: The writing data and the reading data mismatch 3 times continuously when writing.
• Remedy: 1 Checking the connection It is not properly connected to the main unit. Reconnect the side feeder into the main unit. Also, reconnect the wire connectors between the engine PWB and the PF main PWB for the side feeder. Electrical Diagram of PWBs 2 Checking the wire The wire is not properly connected. If the wires on the PF main PWB for the side feeder are pinched or have any damage, fix or replace the wires. When the issue is not resolved, replace the PF main PWB for the side feeder. PF Main PWB Replacement (Side Feeder) 3 Checking the PF main PWB The PF main PWB is faulty. Replace the PF main PWB (Side Feeder). PF Main PWB Replacement (Side Feeder)

• Code: C1950
• Description: Primary transfer unit EEPROM error
• Causes: 1. No response from the device is detected for 5s or more 5 times continuously when reading / writing the data.2. The reading data of 2 points mismatches 8 times continuously.3. The reading data and the writing data mismatch 8 times continuously.
• Remedy: 1 Reinstalling the primary transfer unit The primary transfer unit is not properly installed. Reinstall the primary transfer unit. Primary Transfer Unit Replacement 2 Checking the wire The wire is not properly connected. Reinsert the following wire connectors, and replace the wires when they have no continuity.• Primary transfer unit - Transfer PWB• Transfer PWB - Feed image PWB• Feed image PWB - Engine PWB Electrical Diagram of PWBs 3 Primary transfer unit replacement The primary transfer unit is faulty. Replace the primary transfer unit. Primary Transfer Unit Replacement 4 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB. 5 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Engine PWB Replacement

• Code: C2102
• Description: Developer motor Y/C error Object: 35ppm or faster color models
• Causes: 1. The ready signal is at the L level after passing 2s since developer motor Y/C drive started.2. The ready signal is at the H level for 2s continuously after developer motor Y/C becomes stable.
• Remedy: 1 Checking the developer drive section The developer drive section is faulty. Replace the developer unit drive gear if it is faulty. Developer Unit Replacement 2 Checking the developer roller The developer roller is faulty. Check if the developer roller rotates, and replace the developer unit if not rotating. Developer Unit Replacement 3 Checking developer motor Y/C The developer motor Y/C drive is faulty. Execute U030 [DLP(CMY)] to check the developer motor Y/ C operation.Check if the drive gears rotate smoothly or have no excessive load. And apply the grease to the frictional parts and fix the related parts so that they can rotate smoothly. U030 Execution 4 Checking the wire The wire is not properly connected. Reinsert the following wire connectors, and replace the wires when they have no continuity.• Developer motors Y/ C - Feed image PWB• Feed image PWB - Engine PWB Electrical Diagram of PWBs 5 Checking developer motor Y/C Developer motor Y/C is faulty. Reattach developer motor Y/ C. Then, replace it if it is not fixed. Main Drive Unit Replacement 6 Replacing the feed image PWB The feed image PWB is faulty. Replace the feed image PWB. 7 Firmware upgrade The firmware is not the latest version. Upgrade the engine firmware to the latest version Firmware Upgrade 8 Replacing the engine PWB The engine PWB is faulty. Replace the engine PWB. Engine PWB Replacement