• Code: 001-300
• Description: Left Cover (Door A) Open Left Cover (Door A) is open.
• Remedy: Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK.. Open and close Left Cover (PL 2.7). The display changes. Y↓N→Measure the voltage between +24 LVPS J172B and GND(-). +24 VDC measured. Y↓N→Check for +5 VDC between the gray and violet wires at P511 on the printer +5 VDC LVPS (PL 9.1). +5 VDC is measured. Y↓N→Go to, +5 VDC Low-Voltage Power Supplies RAP. Replace the LVPS (PL 9.1). Remove the Rear Cover. Disconnect J172B (from Left Cover Interlock Switch (PL 2.10)). Check resistance between A1 and B1 when switch is actuated. Resistance is less than 3 ohms. Y↓N→Replace the Left Cover Interlock Switch (PL 2.10). Reinstall the Switch. Close the Left Cover (PL 2.7). Measure the voltage at J531-5 on the I/F PWB. +24 VDC measured. Y↓N→Repair the open circuit between the +24 VDC LVPS and the I/F PWB. Replace the Interface PWB (PL 9.1). If the problem continues, replace the Engine Control Board (MCU PWB) (PL 13.1). Check installation of the Cover/Actuator.

• Code: 001-301
• Description: Left Lower Cover (Door B) Open Left Lower Cover (Door B) is open
• Remedy: Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Open the Left Lower Cover. Actuate the Left Lower Cover Interlock Switch (PL 2.3) with a screwdriver. The display changes. Y↓N→Go to Transmissive Sensor Procedure and repair the LH Lower Cover Interlock Switch (PL 2.3). Check the Sensor, Actuator, and Left Lower Cover installation (PL 2.3).

• Code: 001-302
• Description: Front Cover Door Open Front Cover Door is open.
• Remedy: Open the Front Cover. Cheat the Front Interlock Switch (PL 10.1). 01-510 is cleared. Y↓N→+24 VDC is measured between the I/F PWB P/J531-1 (+) and GND (-) ( I/F PWB, MAIN Motor, LVPS Plug/Jack Locations ). Y↓N→+24 VDC is measured between the Front Interlock Switch P/J171-B1 (+) and GND (-) ( Xerographic, Plug/Jack Locations ). Y↓N→+24 VDC is measured between the Front Interlock Switch P/J171-A1 (+) and GND (-) (refer to Xerographic - Plug/Jack Locations ). Y↓N→Repair the open circuit between the Left Cover Interlock Switch P/J172-B1 ( Exit Transport Assembly - Plug/Jack Locations ) and the Front Interlock Switch P/J171-A1. Replace the Front Interlock Switch (PL 10.1). +24 VDC is measured between the RH Cover Interlock Switch P/J173-B1 (+) and GND (-) ( Outlet Panel Assembly - Plug/Jack Locations ). Y↓N→+24 VDC is measured between the RH Cover Interlock Switch P/J173-A1 (+) and GND (-). Y↓N→Repair the open circuit between the Front Interlock Switch P/J171-B1 and the RH Cover Interlock Switch P/J173-A1. Replace the RH Cover Interlock Switch (PL 10.1). Check the wire for an open circuit between the RH Cover Interlock Switch P/J173-B1 and P/J531-1 on the I/F PWB (HVPS, +24V LVPS - Plug/Jack Locations) Replace the I/F PWB (PL 9.1). If the problem continues, replace the Engine Control Board (MCU PWB) (PL 13.1). Check installation of the Cover/Actuator (PL 10.1).

• Code: 001-303
• Description: Tray Module Left Door (Door C) Open Tray Module Left Door (Door C) is open.
• Remedy: Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Actuate the Tray Module LH Cover Interlock Switch (PL 16.13 TTM, PL 15.10 3TM) with a screwdriver. The display changes. Y↓N→Check voltage between Tray Module PWB P/J554-3(+) and GND(-) ( TT Module (rear); 3T Module (rear) - Plug/Jack Locations ). +24 VDC is measured. Y↓N→Check the wires from the Tray Module PWB P/J554-3 ( 3T Module (rear) - Plug/Jack Locations ) to Tray Module Cover Interlock Switch FS813 for damage. If the wires are good, replace the Tray Module Cover Interlock Switch (PL 16.13 TTM, PL 15.10 3TM). Replace Tray Module PWB (PL 16.15 TTM, PL 15.9 3TM). Check the Cover Actuator and Cover installation (PL 16.13).

• Code: 001-306
• Description: Duplex Door Duplex Door (Door D) is open.
• Remedy: Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. Open the Duplex Transport. Actuate Duplex Cover Interlock Switch with a screwdriver. The display changes. Y↓N→Deactuate the Duplex Cover Interlock Switch. Check voltage on the Drawer Connector between P/J626-6 (+) and GND(-) ( Duplex Transport Assembly, Plug/Jack Locations ). +5 VDC is measured. Y↓N→Check voltage between P/J539-B6 ( I/F PWB, MAIN Motor, LVPS T11- Plug/Jack Locations ) on the I/F PWB and GND(-). +5 VDC is measured. Y↓N→Replace the I/F PWB (PL 13.1). Check for an open circuit between P/J539-B6 on the I/F PWB and Drawer Connector J626-6. Check the wires between Drawer Connector between J626-6 ( Inverter Transport Assembly, Plug/Jack Locations ) and Duplex PWB P/J540-1 ( Duplex Transport Assembly, Plug/Jack Locations ). If the wires are good, replace the Duplex Cover Interlock Switch. Check the Cover Actuator and Cover installation. If there is no problem, replace the Engine Control Board (MCU PWB) (PL 13.1).

• Code: 001-545.01
• Description: Tray 2 Paper Size Sensor Incorrect paper size is detected in Tray 2.
• Remedy: Ensure Tray 2 is closed. The voltage measured at P/J414-A10 (refer to Control Board (MCU PWB) Plug/Jack Locations ) on the Engine Control Board (MCU PWB) corresponds to the paper size in Table 1. Y↓N→There is +3.5 VDC from P/J115 pin 1 to P/J115 pin 3 on the Tray 1 Size Sensor ( Developer Motor, Tray 2 Size Switch Plug/Jack Locations ). Y↓N→There is +3.5 VDC from P/J414-A11 to P/J414-A9. Y↓N→Go to the 3.3 VDC Wirenets to troubleshoot the power circuit. Check the wires from J414A to J115. Check the wire from J414A-10 to J115-2. If the problem continues, replace the Engine Control Board (MCU PWB) (PL 13.1).

• Code: 001-545.02
• Description: Tray 3 Paper Size Sensor Incorrect paper size is detected in Tray 3.
• Remedy: Ensure Tray 3 is closed. The voltage measured at P/J546-8 ( - TT Module (rear); Plug/Jack Locations ; 3T Module (rear) Plug/Jack Locations ) on the Tray Module PWB (PL 16.15) corresponds to the paper size in Table 1. Y↓N→There is +5 VDC from P/J816-1 to P/J816-3 on the Tray 3 Size Sensor ( - 3T Module (Tray 3, 4, 5 Paper Size Switch) Plug/Jack Locations ). Y↓N→There is +5 VDC from P/J546-9 to P/J546-7 on the Tray Module PWB. Y↓N→Go to the +5 VDC Wirenets ( 5.5 VDC Wirenets ) to troubleshoot the power circuit. Check the wires from P/J546 to P/J816. Check the wire from P/J546-8 to P/J816-2. If the wire is OK, replace the Tray 3 Paper Size Sensor (PL 16.1). Replace the Tray Module PWB (PL 16.15). If the problem continues, replace the Tray 3 Paper Size Sensor (PL 16.1).

• Code: 001-545.03
• Description: Tray 4 (HCF) Paper Size Sensor Incorrect paper size is detected in Tray 4.
• Remedy: Ensure Tray 4 is closed. The voltage measured at P/J548 ( - TT Module (rear) Plug/Jack Locations or 3T Module (rear) Plug/Jack Locations on the Tray Module PWB (PL 16.15) corresponds to the paper size in Table 1. Y↓N→There is +5 VDC from P/J820-1 to P/J820-3 on the Tray 4 Size Sensor 3T ( TT Module (Tray 3, 4, 5 Paper Size Switch) Plug/Jack Locations . Y↓N→There is +5 VDC from P/J548-12 to P/J548-11. Y↓N→Go to the +5 VDC Wirenets to troubleshoot the power circuit. Check the wires from J548 to J820. If the check is OK, replace the Tray Module PWB (PL 16.15). Check the wire from J548-11 to J820-2. If the wire is OK, replace the Tray 4 Paper Size Sensor (PL 16.1). Check the wires and connectors for intermittent shorts or loose connections. If the check is OK, replace the Tray Module PWB (PL 16.15). If the problem continues, replace the Tray 4 Paper Size Sensor (PL 16.1).