Xerox WorkCentre 5945

Use this RAP to determine the cause of the image quality problem. Ensure IQ1 Image Quality Entry RAP is performed before starting this RAP.

Initial Actions

Perform the checks that follow. If necessary, install new components:

• Figure 1, check that the left door fan 1 and fan 2 are working. If the fans are working, air will be blown out of the air vents of the left door. If necessary, refer to the OF6 Air Systems RAP
• Figure 1, check that the print cartridge cooling fan runs. This fan draws air from the cavity below the horizontal transport or centre output tray, then directs the air flow via a duct onto the print cartridge. To check the operation of the fan, enter dC330, code 93-001 print cartridge fan. If necessary, refer to the OF6 Air Systems RAP.
• Figure 2, check that the humidity sensor is working. Perform the 391-365-00 Humidity Sensor Failure RAP.
• Perform ADJ 90.1 Xerographic Cleaning. • Check the developer bias track, PL 90.10 Item 4. Refer to the 391A HVPS RAP.
• Check that the high voltage connections to the HVPS are secure, PL 90.10. If necessary, refer to the 391A HVPS RAP.
• Check for loose ground connections. Perform the 301A Ground Distribution RAP.

Make prints. If the image quality defect is still present, perform the procedure.

Procedure

The components that follow can cause image quality defects. Perform the checks:

• Paper Path Checkout.
• Print Cartridge Checkout.
• Fuser Module Checkout.
• LED Print Head Checkout.

Paper Path Checkout

• Figure 2, check the registration transport housing, PL 80.17 Item 1 for wear, damage and contamination. If necessary, clean the housing or install a new part.
• Figure 1, check the registration transfer housing, PL 80.15 Item 2 for wear, damage and contamination. If necessary, clean the housing or install a new part.
• Figure 1, check the bias transfer roll surface for damage or contamination, if necessary, install a new bias transfer roll, PL 80.15 Item 3.

Print Cartridge Checkout

• Three marks/dots/spots on the edge or the body of the prints/copies, that align with the print cartridge stripper fingers, Figure 2, together with some or all of the symptoms that follow, indicates that there is no voltage, or a low voltage supplied to the detack saw due to the detack transformer in the HVPS failing.
  Additional symptoms:
  – Toner contamination of the print cartridge stripper fingers.
  – Broken or missing print cartridge stripper fingers caused by frequent jam clearances.
  – Paper wrinkles.
  – Inverter jams.
  – Dog eared copies/prints.
  Perform the steps that follow:
  1. Ensure the track (DTAK), PL 90.10 Item 6 makes good contact with the HVPS.
  2. Ensure the track (DTAK), PL 90.10 Item 6 touches the detack saw contact when the left door is closed, by connecting one meter lead to the back of the detack saw contact wire and the other meter lead to the track (DTAK). Route the meter leads through the rear frame below the registration motor PL 40.15 Item 6. Set the meter on continuity with the buzzer on. Very carefully close the left door. Re-adjust the lay of the meter leads as necessary so that the door can fully close. If the buzzer sounds, the contact is good.
  3. Ensure the track (DTAK), PL 90.10 Item 6 has continuity from end to end.
  4. If checks 1 and 3 are good, install a new HVPS, PL 1.10 Item 3.
• Check the surface of the photoreceptor in the print cartridge for toner contamination. If the photoreceptor is not clean, cheat the left door interlock switch. Enter dC330 code 093- 045, print cartridge motor. Allow the motor to run for a few seconds. If the photoreceptor surface is still not clean, install a new print cartridge, PL 90.17 Item 9.
• Check that the surface of the photoreceptor is not chipped, scored or scratched. If the photoreceptor is damaged, install a new print cartridge, PL 90.17 Item 9.
• Figure 2, check the print cartridge stripper fingers for wear, damage and contamination. If necessary install a new print cartridge, PL 90.17 Item 9.

Fuser Module Checkout

• Check the fuser rolls and stripper fingers for toner and developer contamination. If contamination is present, perform the IQ4 Fuser Module RAP.

LED Print Head Checkout

• If toner contamination is evident on the LED print head, perform ADJ 60.4 LED Print Head Cleaning Procedure.
• If there are 1 or more image defects in the form of process direction bands that are 8mm (0.3 inch) wide, or multiples thereof, install a new LED print head module, PL 60.35 Item 1.
• Check the LED print head camming mechanism is working correctly. Check that there is no debris that would prevent the LED print head from moving to the imaging position close to the photoreceptor.
• Perform dC304 LED Print Head Validation.
• Check the wiring and connectors between the LED print head and SBC PWB. Refer to the 361-100-00 LED Print Head Data Integrity Failure RAP.