Xerox Phaser 840, Руководство по обслуживанию

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264 Phaser 840/850/860/8200 Color Printer - Service Manual
C/W/P CHECKLIST (continued)
5b.
Was the purge volume low, or is R2 less than 3000?
YES NO
Go to #5c
YES , there may be a leak in the vacuum system or inadequate peak vacuum. R0 is the
measurement of the vacuum decay time. This could be due to:
■
Misaligned C/W/P due to improper belt alignment or C/W/P motion problem
■
Damaged C/W/P gasket
■
Plugged or leaking tubing (holes/cracks in tubing)
■
Defective vacuum module
Inspect and replace the C/W/P or tubing as needed (if the C/W/P is replaced return to Step 2 .
Note that a new C/W/P may take 6 purges before optimal performance). If no problem is seen,
replace the vacuum module.
5c. Is R2 greater than 8000? YES NO
Go to #6
YES , there may be a problem with the air solenoid, or clogged tubing. If the tubing is ok, replace
the vacuum module.
NOTE: After exiting diagnostics there may be some color mixing as the Cap Vacuum test does not do
a complete series of faceplate wipes. Performing an Eliminate Light Stripes cycle should resolve this.
6. Print Service Test 2: Weak and Missing Jets.
Are there weak or missing jet(s)? YES NO
■
NO weak or missing jets and Non-Xerox/Tektronix ink is used, go to Test for
Non-Xerox/Tektronix Ink Failure Checklist on next page.
■ NO
weak and missing jets and
Xerox/Tektronix ink
is used, repair is complete!
■
YES and Non-Xerox/Tektronix ink is used, go to Test for Non-Xerox/Tektronix
Ink Failure Checklist .
■ YES
and
Xerox/Tektronix ink
is used, go to
Step 8
.
7. Is the customer is experiencing vertical bands in solid color areas? YES NO
Complete!
YES , print 10 solid fill pages of cyan. 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 120 solid fill pages to refresh
all of the ink in the printhead reservoir. The repair is now complete!
8. Install a new printhead. Test performance.
Comments: (Xerox US personnel please add all comments in TechLink)
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