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Konica-Minolta bizhub 28e

Troubleshooting. Machine malfunction. Documents jam frequently Please reset the document

What to confirm Yes No
1. Did you feed a single document? Check No. 2. Check No. 3
2. Did you use thin paper or converted paper? Recommend the customer to use the document glass. Check No. 8.
3. Did you set documents more than the capacity? Check No. 4. Check No. 5.
4. If you set documents within the capacity, the symptom be fixed. Solved. Check No. 5.
5. Did you use wrinkled or curled documents? Recommend the customer to use the document glass. Check No. 6.
6. Does the machine still feed documents? Check No. 7. Check No. 8.
7. Does the machine still discharge documents? Check No. 23. Check No. 24.
8. Does the clutch rotate properly? Check No. 9. Replace the clutch.
9. Does the separate roller work properly? Check No. 11. Check No. 10.
10. Does the transfer gear work properly? Check No. 11. Adjust the gear.
11. Does the ADF motor rotate properly? Check No. 12. Replace the ADF motor.
12. Is the separation pad pressure appropriate? Check No. 13. Adjust the separation pad pressure.
13. Do CN1-1, 2, 3 and 4 of the power supply have +24V output? Check No. 14. Replace the power supply.
14. If you replace the harness between the power supply and main control board, the message will disappear. Replace the harness between the power supply and main control board. Check No. 15.
15. Do P3-1, 2, 3, and 4 on the main control board have +24V output Check No. 16. Replace the main control board.
16. Has the DS1 sensor been installed properly? Check No. 17. Re-install it properly.
17. Does the feeler for the DS1 sensor work properly? Check No. 18. Replace the DS1 sensor feeler.
18. Are there any foreign objects stuck around paper guides? Remove the objects. Check No. 19.
19. Does the voltage level of P3-5 on the main control panel change to +0V when the DS1 is ON, and to +3.3V when the DS1 is OFF? Check No. 21. Check No. 20.
20. If you replace the DS1 sensor, the symptom will be fixed. Replace the DS1. Replace the main control board.
21. Does the voltage level of P3-12 on the main control panel change to +0V when the DS2 is ON, and to +3.3V when the DS2 is OFF? Check No. 22. Check No. 25.
22. If you replace the DS2 sensor, the symptom will be fixed. Replace the DS2. Replace the main control board.
23. Does the voltage level of P4-5 on the main control panel change to +0V when the DS3 is ON, and to +3.3V when the DS3 is OFF? Check No. 24. Check No. 25.
24. If you replace the DS3 sensor, the symptom will be fixed. Replace the DS3. Replace the main control board.
25. Is the separation roller dirty? Replace the separation roller. Check No. 26.
26. Is the separation pad dirty? Replace the separation pad. Replace the machine.
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