• Code: 920.10
• Description: POST Error Three toner sensors are not connected.
• Remedy: 1 1. Turn the printer off. 2. Remove the rear frame cover. See “Rear frame cover removal”. 3. Reseat the cable in connector JHVPS1. Did the error clear? Problem resolved. Go to step 2. 2 Check the HVPS cable in connector JHVPS1 for pinch points and any other damage to the cable or connector. Is the cable damaged? Replace the HVPS cable. See “High-voltage power supply (HVPS) cable removal”. Go to step 3. 3 1. Remove the left cover. See “Left cover removal”. 2. Reseat and check all the toner level sensor cables (A) connected to the rear of the HVPS for damages and if they are installed correctly. Does the problem persist? Go to step 4. Problem resolved. 4 Connect four new toner level sensors outside the machine and perform a POR. Note: Keep track of which sensors change the error code to reduce the number of failing sensors. Keep the old sensor which does not reduce the failing number, leaving three new sensors and no error reported. Does the problem persist? Go to step 5. Replace the failing toner level sensors. See “Toner level sensor removal”. 5 Replace the HVPS board. See “High-voltage power supply (HVPS) removal”. Did the error clear? Problem resolved. Go to step 6. 6 1. Install the old HVPS back to the machine. 2. Replace the HVPS cable. See “Highvoltage power supply (HVPS) cable removal”. Does the problem persist? Replace the system board. See “System board removal” Problem resolved.

• Code: 920.11
• Description: POST Error Two toner sensors are not connected.
• Remedy: 1 1. Turn the printer off. 2. Remove the rear frame cover. See “Rear frame cover removal”. 3. Reseat the cable in connector JHVPS1. Did the error clear? Problem resolved. Go to step 2. 2 Check the HVPS cable in connector JHVPS1 for pinch points and any other damage to the cable or connector. Is the cable damaged? Replace the HVPS cable. See “High-voltage power supply (HVPS) cable removal”. Go to step 3. 3 1. Remove the left cover. See “Left cover removal”. 2. Reseat and check all the toner level sensor cables (A) connected to the rear of the HVPS for damages and if they are installed correctly. Does the problem persist? Go to step 4. Problem resolved. 4 Connect four new toner level sensors outside the machine and perform a POR. Note: Keep track of which sensors change the error code to reduce the number of failing sensors. Keep the old sensor which does not reduce the failing number, leaving three new sensors and no error reported. Does the problem persist? Go to step 5. Replace the failing toner level sensors. See “Toner level sensor removal”. 5 Replace the HVPS board. See “High-voltage power supply (HVPS) removal”. Did the error clear? Problem resolved. Go to step 6. 6 1. Install the old HVPS back to the machine. 2. Replace the HVPS cable. See “Highvoltage power supply (HVPS) cable removal”. Does the problem persist? Replace the system board. See “System board removal” Problem resolved

• Code: 920.12
• Description: POST Error One toner sensor is not connected.
• Remedy: 1 1. Turn the printer off. 2. Remove the rear frame cover. See “Rear frame cover removal”. 3. Reseat the cable in connector JHVPS1. Did the error clear? Problem resolved. Go to step 2. 2 Check the HVPS cable in connector JHVPS1 for pinch points and any other damage to the cable or connector. Is the cable damaged? Replace the HVPS cable. See “High-voltage power supply (HVPS) cable removal”. Go to step 3. 3 1. Remove the left cover. See “Left cover removal”. 2. Reseat and check all the toner level sensor cables (A) connected to the rear of the HVPS for damages and if they are installed correctly. Does the problem persist? Go to step 4. Problem resolved. 4 Connect four new toner level sensors outside the machine and perform a POR. Note: Keep track of which sensors change the error code to reduce the number of failing sensors. Keep the old sensor which does not reduce the failing number, leaving three new sensors and no error reported. Does the problem persist? Go to step 5. Replace the failing toner level sensor. See “Toner level sensor removal”. 5 Replace the HVPS board. See “High-voltage power supply (HVPS) removal”. Did the error clear? Problem resolved. Go to step 6. 6 1. Install the old HVPS back to the machine. 2. Replace the HVPS cable. See “Highvoltage power supply (HVPS) cable removal”. Does the problem persist? Replace the system board. See “System board removal” Problem resolved.

• Code: 920.13
• Description: POST Error Cartridge motor 1 (top) not connected.
• Remedy: 1 1. Turn the printer off. 2. Remove the rear frame cover. See “Rear frame cover removal”. 3. Reseat the cables in connectors JCARTP1 and JCARTS1. Did the error clear? Problem resolved. Go to step 2. 2 Check the cables in connectors JCARTP1 and JCARTS1 for pinch points and any other damage to the cables or connectors. Is the cable damaged? Replace the cartridge motor 1/fuser cable. See “Cartridge motor 1/fuser cable removal”. Go to step 3. 3 1. Remove the right cover. See “Right cover removal”. 2. Check for the cartridge 1/fuser motor cable (A) for proper connection to the EP drive assembly, pinch points for the cable, or any other damage to the cable or connector. Is either cable (A) damaged? Replace the cartridge motor 1/fuser cable. See “Cartridge motor 1/fuser cable removal”. Go to step 4. 4 Measure the continuity across all of the fuses on the system board. Are any of the fuses blown? Replace the system board. See “System board removal”. Go to step 5. 5 Plug in a new EP drive assembly cartridge motor 1 with the old cable from outside the machine. Does the problem persist? Go to step 6. Replace the EP drive assembly. See “Electrophotographic (EP) drive assembly removal”. 6 Plug in a new EP drive assembly cartridge motor 1 with a new cable from outside the machine. Does the problem persist? Replace the system board. See “System board removal”. Replace the cartridge motor 1/fuser cable. See “Cartridge motor 1/fuser cable removal”.

• Code: 920.14
• Description: POST Error Cartridge motor 2 (middle) is not connected.
• Remedy: 1 1. Turn the printer off. 2. Remove the rear frame cover. See “Rear frame cover removal”. 3. Reseat the cables in connector JCARTP2 and JCARTS2. Did the error clear? Problem resolved. Go to step 2. 2 Check the cable in connector JCARTP2 and JCARTS2 for pinch points and any other damage to the cable or connector. Are the cables damaged? Replace the cartridge motor 2/3 cable. See “Cartridge motor 2/3 cable removal”. Go to step 3. 3 1. Remove the right cover. See “Right cover removal”. 2. Check the cartridge motor 2/3 cable (A) for the proper connection to the EP drive assembly, pinch point for the cable, or damage to the cable or connectors. Is either cable (A) damaged? Replace the cartridge motor 2/3 cable. See “Cartridge motor 2/3 cable removal”. Go to step 4. 4 Measure the continuity across all of the fuses on the system board. Are any of the fuses blown? Replace system board. See “System board removal”. Go to step 5. 5 Connect a new cartridge motor 1/fuser cable from the outside of the machine. Did the error clear? Replace the cartridge motor 1/fuser cable. See “Cartridge motor 1/fuser cable removal”. Go to step 6. 6 Connect the old cartridge motor 1/fuser motor cable to a new EP drive assembly outside of the machine. Did the error clear? Replace the EP drive assembly. See “Electrophotographic (EP) drive assembly removal”. Replace system board. See “System board removal”.

• Code: 920.15, 920.20
• Description: 920.15 POST Error Bad transfer module NVRAM data. 920.20 POST Error Incompatible transfer module.
• Remedy: 1 1. Turn the printer off. 2. Remove the rear frame cover. See “Rear frame cover removal”. 3. Check the JTPS1 connector for any damage, and then reseat the JTPS1 cable. 4. Check the transport cable connection to the transport belt for any damages. a.Open the front door cover b.Reseat the transport cable in the transfer belt module. Did the error clear? Problem resolved. Go to step 2. 2 Replace the transfer belt module. See “Transfer module removal”. Does the problem persist? Go to step 3. Problem resolved. 3 Connect a new transport cable from outside of the machine. Does the problem persist? Return the old transport belt module and old transport cable then replace the system board. See “System board removal”. Return the old transport belt module and replace the transport cable. See “Transport cable removal”.

• Code: 920.16
• Description: POST Error Bad printhead NVRAM data.
• Remedy: 1 1. Turn the printer off. 2. Remove the rear frame cover. See “Rear frame cover removal”. 3. Reseat the large printhead cable in connector JPH1. Did the error clear? Problem resolved. Go to step 2. 2 Check the cable in connector JPH1 for pinch points and any other damage to the cable or connector. Is the cable damaged? Replace the printhead. See “Printhead removal, installation, and adjustment”. Go to step 3. 3 1. Perform the printhead verification to check whether the printhead replacement fixes the problem. See “Printhead verification”. 2. POR the printer. Did the printhead motor pass the test? Replace the printhead. See “Printhead removal, installation, and adjustment”. Replace the system board. See “System board removal”.

• Code: 920.17
• Description: POST Error Output bin cable not connected.
• Remedy: 1 1. Turn the printer off. 2. Remove the rear frame cover. See “Rear frame cover removal”. 3. Reseat the bin full sensor cable in connector JBIN1. Did the error clear? Problem resolved. Go to step 2. 2 Check the bin full sensor cable in connector JBIN1 for pinch points and any other damage to the cable or connector. Is the cable damaged? Replace the bin full sensor with cable. See “Bin full sensor assembly removal”. Go to step 3. 3 1. Disconnect the cable in JBIN1 connector. 2. Connect the new bin full sensor flag connector in the JBIN1 connector. 3. Enter Diagnostics mode (press and hold buttons 3 and 6, turn on the MFP, and release the buttons when the progress bar displays. 4. Touch SENSOR TESTS. 5. Touch Dynamic Sensors. 6. Touch Other Sensors. 7. Touch Bin Full. 8. Activate the new bin full sensor by pressing on the flag, as shown. Did the bin full sensor change from Open to Closed on the touchscreen? Replace the bin full sensor and cable. See “Bin full sensor assembly removal”. Replace the system board. See “System board removal”.