Xerox WorkCentre Pro 423 Service Manual page 531

WorkCentre Pro 423/428
11. Connect the IIT/DADF Cable. (Figure-7)
(Figure-7) j0hn8084
12. Adjust the DADF Assembly height. (Figure-8)
1) The protrusions at the rear of the Under Cover of the DADF Assembly (1) should
gently contact the DADF Platen Glass. If there is any clearance, adjust the DADF
Assembly height.
2) The protrusions at the front of the Under Cover of the DADF Assembly (2) should
not be more than 0.5 mm from the DADF Platen Glass. If the clearance is 0.5 mm
or more, adjust the DADF Assembly height.
- For adjustment, loosen the Counter Balance Nut and turn the Screw.
adjustment, tighten the Nut securely.
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13. Connect the power cord and turn on the power.
14. Check the DADF operation.
After
1) Load several sheets of document on the DADF to see that one sheet is fed at a
time and copied.
Note If "Document load indicator light" is not lit and Document miss feed has
occurred, check the Platen Open SW (PL3.1) detection error by DADF miss alignment.
2) Load a 2-sided document to see that each side is copied onto one sheet.
3) Check that no document skew occurs. If an adjustment is necessary, perform the
DADF document skew adjustment according to Adjustment 10.xx in Chapter 4.
15. Adjust the DADF read position.
1) Enter C/E Mode.
2) Take a note of the value of Chain/Function code "21/71."
3) Take a note of the balance after the value in Step 2 is deducted from 143.
4) Set Chain/Function code "21/87" and press the Start button.
5) Enter the value calculated in Step 3 as the set value.
16. Perform the DADF side registration adjustment.
- Check
1) Load the A3 Chart from the kit on the DADF and make one copy.
2) Check that the difference between registrations on the copy and A3 Chart is ± 2.0
mm or less.
CHAPTER 8 ACCESSORIES
8.21 Duplex Auto Document Feeder
1 2
(Figure-8) j0hn8085