Xerox Phaser 840 Service Manual page 279

CAP/WIPE/PURGE (C/W/P) CHECK LIST
1. Verify C/W/P belt alignment.
Is the C/W/P out of alignment?
YES: Perform C/W/P belt alignment procedures. Go to step 2.
2. Print Service Test Print 2: Weak and Missing Jets.
Is there color mixing from one row to the next row for the same jet?
YES: Replace C/W/P. New C/W/P may take 6 purges before optimal performance. Repeat step 2.
3. Visually check the printhead faceplate.
Are there streaks or smudges of wax in the jet area of the printhead?
YES , replace C/W/P. New C/W/P may take 6 purges before optimal performance. Go to step 2.
4. Visually check the C/W/P wiper gasket.
Is there any separation on the wiper blade, or pitting of the C/W/P gasket? YES
YES , replace C/W/P. New C/W/P may take 6 purges before optimal performance. Go to step 2.
5 . Check the Purge Performance .
BEFORE running the diagnostic test, empty the Waste Bin. Then enter diagnostics mode and select
the "Cap Vacuum" test from the Check menu.
Enter the diagnostic results:
Select "Unlock DM Tray" from the Function menu. Remove the maintenance tray and note whether
or not a normal volume of ink was purged from the printhead (Note: the Phaser 860 purge volume is
about half as much as the Phaser 840/850).
Purge Volume:
5a. Are either R0 or R1 outside their normal ranges?
YES , Something may be obstructing the printhead tilt mechanism. R0 is a measurement of the current
needed to tilt the printhead. R1 measures the amount of gear train slack in the tilt mechanism.
Continued on next page...
R0:_____________(normally 20-200)
R1: _____________(normally 40-1600)
R2: _____________(normally 3000-8000)
YES
YES
YES
NORMAL LOW
YES NO
Go to #5b
Appendix
NO
Go to #2
NO
Go to #3
NO
Go to # 4
NO
Go to # 5
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