Tektronix Phaser 840, Service Manual

Page: 96 / 207

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.