• Code: 938.15
• Description: Electronics Hardware Error An output bin sensor not connected error occurred.
• Remedy: 1 Is the bin-full flag damaged? Replace the bin-full flag. See “Bin-full flag removal”. Go to step 2. 2 Turn the printer off, and open the system board shield. Check the cable in connector JTCVR1 for proper connection to the system board. Is the cable properly connected? Go to step 3. Reseat the cable. 3 Check the cable in connector JTCVR1 for damage. Is the cable damaged? Replace the bin-full and output beacon cable. To access the cable, see “Top cover removal”. Go to step 4. 4 Remove the top cover assembly. See “Top cover removal”. Is the cable properly connected? Go to step 5. Reseat the cable. 5 Replace the bin-full sensor. See “Bin-full sensor removal” Does the error reoccur? Replace the system board. See “System board removal”. Problem solved.

• Code: 938.16
• Description: Electronics Hardware Error An MPF paper out sensor not connected error occurred.
• Remedy: 1 Turn the printer off, and open the system board shield. Check the cable in connector JMPF1(MPF sensor cable) for proper connection to the system board. Is the cable properly connected? Go to step 2. Reseat the cable. 2 Check the cable in the JMPF1(MPF sensor cable) connector for damage. Is the cable damaged? Replace the MPF sensor cable. See “MPF sensor cable”. Go to step 3. 3 Remove the MPF sensor plate assembly. See “MPF sensor plate assembly removal”. Check the cable connected to the sensor. Is the cable properly connected? Go to step 4. Reseat the cable. 4 Replace the MPF sensor plate assembly. See “MPF sensor plate assembly removal”. Does the error reoccur? Replace the system board. See “System board removal”. Problem solved.

• Code: 938.18
• Description: Electronics Hardware Error A waste toner sensor not connected error occurred.
• Remedy: 1 Turn the printer off, and open the system board shield. Check the cable in connector JWTB1 for proper connection to the system board. Is the cable properly connected? Go to step 2. Reseat the cable. 2 Check the cable for damage. Is the cable damaged? Replace the waste toner cable. See “Waste toner cable removal”. Go to step 3. 3 Remove the waste toner sensor. See “Waste toner sensor removal”. Check the cable connected to the sensor. Is the cable properly connected? Go to step 4. Reseat the cable. 4 Replace the waste toner sensor. See “Waste toner sensor removal”. Does the error reoccur? Replace the system board. See “System board removal”. Problem solved.

• Code: 938.19
• Description: Electronics Hardware Error A waste toner full sensor not connected error occurred.
• Remedy: 1 Turn the printer off, and open the system board shield. Check the cable in connector JWTBF1 for proper connection to the system board. Is the cable properly connected? Go to step 2. Reseat the cable. 2 Check the cable for damage. Is the cable damaged? Replace the waste toner cable. See “Waste toner full cable removal”. Go to step 3. 3 Remove the waste toner full sensor. See “Waste toner full sensor removal”. Check the cable connected to the sensor. Is the cable properly connected? Go to step 4. Reseat the cable. 4 Replace the waste toner full sensor. See “Waste toner full sensor removal”. Does the error reoccur? Replace the system board. See “System board removal”. Problem solved.

• Code: 938.20
• Description: Electronics Hardware Error A duplex motor failure occurred.
• Remedy: 1 Open the left access door assembly, and check the duplex assembly gears for damage. Is the duplex assembly damaged? Replace the duplex assembly. See “Duplex assembly removal”. Go to step 2. 2 Turn the printer off, and open the system board shield. Check the cable in connector JDUPL1 (Duplex motor cable) for proper connection to the system board. Is the cable properly connected? Go to step 3. Reseat the cable. 3 Check the cable for damage. Is the cable damaged? Replace the duplex motor cable. See “Staging paper path reference edge assembly removal” to access the cable. Go to step 4. 4 Remove the rear cover and the left cover. See“Rear cover removal” and “Left cover removal”. Check the cable connection to the duplex motor. Is the cable connected correctly to the motor? Go to step 5. Reseat the cable. 5 Replace the housing interlock assembly. See “Housing interlock assembly removal”. Dose the error reoccur? Replace the system board. See “System board removal”. Problem solved.

• Code: 938.21
• Description: Electronics Hardware Error A staging motor failure occurred.
• Remedy: 1 Turn the printer off, and open the system board shield. Check the cable in connector JSTAG1 (staging motor cable) for proper connection to the system board. Is the cable properly connected? Go to step 2. Reseat the cable. 2 Check the cable for damage. Is the cable damaged? Replace the staging motor cable. See “Staging paper path reference edge assembly removal” to access the cable. Go to step 3. 3 Remove the LVPS. See “Low-voltage power supply (LVPS) removal”. Check the cable connection to the motor. Is the cable connected correctly to the staging motor? Go to step 4. Reseat the cable. 4 Replace the staging paper path reference edge assembly. See “Staging paper path reference edge assembly removal”. Dose the error reoccur? Replace the system board. See “System board removal”. Problem solved.

• Code: 938.22
• Description: Electronics Hardware Error A printhead failure error occurred.
• Remedy: 1 View the Event Log: 1. Turn off the printer, press and hold 3 and 6 and turn on the printer. 2. Select EVENT LOG > Display Log. Has a 110.xx error occurred three times or more? Replace the printhead. See “Printhead removal, installation, and alignment”. Go to step 2. 2 Turn the printer off, and open the system board shield. Check the printhead cables (A) in connectors JMM1, JPH1, and JPH2 for proper connection to the system board. Are the cables properly connected? Go to step 3. Reseat the cables. 3 Check the printhead cables in connectors JMM1, JPH1, and JPH2 for damage. Are the cables damaged? Replace the printhead. See “Printhead removal, installation, and alignment”. Go to step 4. 4 Measure the resistance across fuse F13 on the system board. Is the fuse blown? Replace the system board. See “System board removal”. Go to step 5. 5 Perform the printhead verification to check whether the new printhead solves the problem. See “Printhead verification”. Did the printhead motor pass the test? Replace the printhead. See “Printhead removal, installation, and alignment”. Replace the system board. See “System board removal”.

• Code: 938.23
• Description: Electronics Hardware Error An autocomp motor error occurred.
• Remedy: 1 Turn the printer off, and open the system board shield. Check the cable in connector JTRAY1 (A) for proper connection to the system board. Is the cable properly connected? Go to step 2. Reseat the cable. 2 Check the cable for damage. Is the cable damaged? Replace the Tray 1 machine side cable. See “Autocomp W2W cable”. Go to step 3. 3 Remove the standard media tray. Check the cable (A) from the paper pick mechanism assembly to the printer. Is the cable properly connected? Go to step 4. Reseat the cable. 4 Remove the paper pick mechanism assembly. See “Paper pick mechanism assembly removal”. Does the error reoccur? Replace the system board. See “System board removal”. Problem solved.