Xerox C2424 Service Manual - Page 421
Step 6., Eliminate Light Stripes, JetFix, A-9
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6 Step 7 Step 8 Step 9a Step 9b Cap/Wipe/ Purge assembly correctly aligned? Print Service Test Print 2: Weak and Missing Jets. Is severe color mixing apparent? Visually check the printhead faceplate. Is the faceplate contaminated? Visually check the Wiper Assembly blade. Is it OK? Check the purge performance of the purge system. YES NO Circle one YES NO Circle one YES NO Circle one YES NO Circle one faceplate)? If YES, perform the wiper alignment procedure as described in the Phaser 8400 Color Printer Service Guide. Is there color mixing from one row to the next row for the same jet? Note: Some color mixing is normal following a purge. It usually clears after one or two prints. If YES, replace the wiper assembly. Repeat Step 6. Are there streaks, smudges, or a scum of wax in the jet area (outlined in red) of the printhead? If YES, replace the wiper assembly. Repeat the checklist stating at Step 6. Is there any damage or separation on the wiper blade? If YES, replace the wiper assembly. Check the purge pump performance. 9a. Empty the waste tray. 9b. Select Eliminate Light Stripes from the printer front panel and run one cleaning cycle. 9c. Remove the waste tray and examine how much ink was purged. A single purge should resemble the illustration. Step 11 Print Service Test 2: Weak and Missing Jets. Are there weak or missing jet(s)? Step Is the customer YES NO Circle one Is the purge mass noticeably less than what is pictured? If YES, inspect the purge hoses for splits or tears. x If NO go to Step 12. x If YES, do the following: x Check the exit area of the paper path for debris that could be scraping ink off the drum and may mimic a weak or missing jet. x Select Eliminate Light Stripes from the printer front panel up to 3 times as needed to recover a weak or missing jet. x Perform the JetFix technique by downloading the appropriate snippet (such as 8400_jetfix_c.ps for a missing cyan jet) to the printer. The snippets are available on the Customer Support Resources website in the Phaser 8400 web pages. Refer to Service Bulletin 640. x If the jet is still missing, replace the printhead. The repair is complete! x If YES, print 10 solid fill pages of cyan. If the bands vary in intensity Xerox Phaser 8400 Printhead Checklist - Version 1.1 075-0882-01 Page 3 A-9