• Code: 004-323
• Description: Black Imaging Unit Motor Fail Black Imaging Unit Motor has failed.
• Remedy: 1 1. Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics > OK. 2. Select Motors/Fan Tests > OK. Select Imaging Unit Motors > OK. Go to step 7. Go to step 2. 2 Is the voltage at J235-4 +5 VDC? Go to step 3. Refer to Xerographics to troubleshoot the missing +5 VDC. 3 Is the voltage at J235-1 +5 VDC? Go to step 4. Refer to Xerographics to troubleshoot the missing +24 VDC. 4 1. Run the Imaging Unit Motors test from Service Diagnostics. 2. Is the voltage at J235-5 0 VDC with the test running? Go to step 5. Refer to Xerographics to troubleshoot. 5 Is the frequency between J235-7 between 1KHz and 1.3 KHz? Replace the Black Imaging Unit Motor. Go to step 6. 6 Is the frequency between J535-7 and ground between 1 KHz and 1.3KHz? Check for an open circuit between J235-8 and J535-2. Refer to Xerographics to troubleshoot missing +3 VDC.

• Code: 004-331
• Description: Engine Control Board Fuse F1 Open Fuse F1 on the Engine Control Board is open.
• Remedy: NOTE: A 006-372 (Polygon Motor Failure) error code can be displayed if Fuse F1 on the Engine Control Board opens during the printing process. After power is cycled, the 004-331 error code should be displayed. Fuser F1 on the Engine Control Board provides circuit protection through the following P/Js. Verify that there ar e no short circuits or components that would cause this Fuse to open again if replaced. • P400, pin 1 • P402, pin 6 • P403, pin B1 • P404, pin A6, pin A8, pin A10, pin A12, pin B2

• Code: 004-332
• Description: Engine Control Board Fuse F2 Open Fuse F2 on the Engine Control Board is open.
• Remedy: NOTE: No error message will be displayed if Fuse F2 on the Engine Control Board opens during the printing process. After power is cycled, the 004-332 error code should be displayed. Fuse F2 on the Engine Control Board provides circuit protection through the following P/Js. Verify that there are no short circuits or components that would cause this Fuse to open again if replaced. • P400, pin 1 • P402, pin 6 • P403, pin B1, pin B17 • P404, pin A6, pin A10, pin B2

• Code: 004-333
• Description: Engine Control Board Fuse F3 Open Fuse F3 on the Engine Control Board is open.
• Remedy: NOTE: No error message will be displayed if Fuse F3 on the Engine Control Board opens during the printing process. After power is cycled, the 004-333 error code should be displayed. Fuse F3 on the Engine Control Board provides circuit protection through the following P/Js. Verify that there are no short circuits or components that would cause this Fuse to open again if replaced. • P404, pin A4 • P406, pin 9

• Code: 004-334
• Description: Engine Control Board Fuse F5 Open Fuse F5 on the Engine Control Board is open.
• Remedy: NOTE: No error message will be displayed if Fuse F5 on the Engine Control Board opens during the printing process. After power is cycled, the 004-334 error code should be displayed. Fuser F5 on the Engine Control Board provides circuit protection through the following P/Js. Verify that there are no short circuits or components that would cause this Fuse to open again if replaced. • P400, pin 4

• Code: 004-335
• Description: Interface PWB Fuse F2 Open Fuse F2 on the Interface PWB is open.
• Remedy: NOTE: The error message “Accumulator Belt Failure” will be displayed if Fuse F2 on the Interface PWB opens during the printing process. After power is cycled, the message “Accumulator Belt Failure” and the 004-335 error code should be displayed. Fuse F2 on the Interface PWB provides circuit protection through the following P/Js. Verify that there are no short circuits or components that would cause this Fuse to open again if replaced. • P531, pin 3 • P539, pin A8

• Code: 004-336
• Description: Interface PWB Fuse F3 Open Fuse F3 on the Interface PWB is open.
• Remedy: NOTE: No error message will be displayed if Fuse F3 on the Interface PWB opens during the printing process. After power is cycled, the 004-336 error code should be displayed. Fuse F3 on the Interface PWB provides circuit protection through the following P/Js. Verify that there are no short circuits or components that would cause this Fuse to open again if replaced. • P531, pin 3, pin 4, pin 5 • P532, pin 7 • P533, pin 3 • P535, pin 10 • P536, pin 10, pin 11 • P537, pin 6, pin 11 • P539, pin A6 • P540, pin B3, pin B4 • P541, pin A1, pin B1, pin B2

• Code: 004-337
• Description: Interface PWB Fuse F4 Open Fuse F4 on the Interface PWB is open.
• Remedy: NOTE: No error message will be displayed if Fuse F4 on the Interface PWB opens during the printing process. After power is cycled, the message “Transfer Roller Contact Failure” and the 004-337 error code should be displayed. Fuse F4 on the Interface PWB provides circuit protection through the following P/Js. Verify that there are no short circuits or components that would cause this Fuse to open again if replaced. • P537, pin 6, pin 11 • P540, pin B3, pin B4 • P541, pin B1, pin B2