Xerox Phaser 8400 Service Manual page 351

If YES, run the service diagnostic test Check Activators - Purge Vent Solenoid.
R0 - test results _________. (Passing value is typically between 0.5 and 1.2).
R1 - test results _________. (Passing value is typically between 0.4 and 1.2).
If the R-values differ significantly from the values shown, replace the purge pump and retest.
If YES, run the internal diagnostic test Check Drive - Tilt Axis Drive.
R0 - test results _________. (Passing value is typically between 10 and 600).
R1 - test results _________. (Passing value is typically between 300 and 3100).
R2 - test results _________. (Passing value is typically between -5100 and -500).
R3 - test results _________. (Passing value is typically between 1400 and 4150).
R4 - test results _________. (Passing value is typically between -4000 and -75).
If the R-values differ significantly from the values shown, troubleshoot the head tilt system. Ensure the
printhead heater wiring is secured in its restraint and not interfering with the printhead tilt action.
6. Print Service Test 2: Weak and Missing Jets.
Are there weak or missing jet(s)?
If NO weak or missing jets and generic ink is used, document the brand of non-Xerox ink and lot
codes in the Comments section below.
If NO weak or missing jets and Xerox ink is used, go to Step 7.
If YES and non-Xerox ink is used, document the brand and lot codes of non-Xerox ink in the
Comments section below then go to Step 8.
If YES and Xerox ink is used, go to Step 8.
7. Is the customer experiencing vertical bands (not light stripes) in solid color areas?
If YES, print 10 solid fill pages of the problem color. If the bands vary in intensity and/or location over
the 10 prints, the customer is experiencing stagnant ink discoloration. Continue to print solid fills of the
offending color until the output is uniform. It may take over 60 solid fill pages to refresh all of the ink
in the printhead reservoir. The repair is now complete! Do not go on to Step 8 and 9.
8. Install a new printhead and the Xerox ink included with the printhead.
9. Test the performance of the new printhead.
Comments:
(Xerox U.S. personnel please add all comments into FIST)
____________________________________________________________________________
____________________________________________________________________________
____________________________________________________________________________
Xerox
Service Manual
Phaser 8400 Printhead Checklist - Version 1.0
YES NO
YES NO
Repair is
complete!
075-0882-00 Page 4
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