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Service Guide
85
Troubleshooting following cap/wipe/purge installation
After installing a new cap/wipe/purge assembly, up to 6 front panel-initiated
clean cycles may be required before the cap/wipe/purge assembly gasket seals
properly.
1.
Be sure to verify the new cap/wipe/purge assembly performance by
completing the vacuum and decay time checks discussed earlier.
2.
Test for print quality. After installing a new cap/wipe/purge assembly,
test its performance by printing Service Test Print 2 to check for weak
or missing jets. If print quality is not satisfactory, perform up to 6 clean
cycles. As a last resort, a new printhead should be installed.
3.
Install a new printhead only after completing the cap/wipe purge
assembly check and performing 6 clean cycles. If you are not sure the
printhead is the problem, change the cap/wipe/purge assembly
assembly first.
Note
The front panel Head-to-Drum Adjust will time-out after
20 minutes, resulting in a 4,015.45 error. To clear the error, cycle
power on the printer.
4.
After installing a new printhead, be sure to set the front panel hidden
service menu item Head Adjust setting to the factory default of 128.
5.
Check cap/wipe/purge assembly purge performance. After installing
a new printhead, you must recheck the cap/wipe/purge assembly
system vacuum and decay as described earlier. If the printhead is not
installed correctly, the cap/wipe/purge assembly gasket may leak.
Summary of Contents for Phaser 840
Page 11: ...xii Phaser 840 and 850 Color Printers ...
Page 65: ...54 Phaser 840 and 850 Color Printers ...
Page 101: ...90 Phaser 840 and 850 Color Printers ...
Page 125: ...114 Phaser 840 and 850 Color Printers ...
Page 134: ...Service Guide 123 Clearing PostScript NVRAM menu item ...
Page 135: ...124 Phaser 840 and 850 Color Printers ...
Page 166: ...Service Guide 155 Figure 1 Cabinet FRUs 7 5 6 8 1 2 4 0388 21 3 9 9 ...
Page 170: ...Service Guide 159 Figure 3 Paper path FRUs 0388 80 2 1 5 11 10 9 12 6 4 3 7 13 8 11a 11b ...
Page 172: ...Service Guide 161 Figure 4 Motor and fan FRUs 0388 14 7 4 3 5 6 2 1 ...
Page 174: ...Service Guide 163 Figure 5 Circuit board FRUs 4 3 5 2 1 9 7 6 8 10 11 13 0388 81 12 7a ...
Page 176: ...Service Guide 165 Figure 6 Solenoid and clutch FRUs 4 5 3 2 1 0388 23 ...
Page 182: ...Service Guide 171 Figure 9 High capacity PaperTray 0388 65a 1 2 ...