Xerox 8500DN Service Manual - Page 367
Step 6., Eliminate Light Stripes - Basic, Phaser 8400/8500/8550 Color Printer Service Guide, severe
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Reference Step 6 Step 7 Step 8 Is the 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? YES NO Circle one YES NO Circle one YES NO Circle one Is the wiper assembly out of alignment (not parallel with the printhead faceplate)? If YES, perform the wiper alignment procedure as described in the Phaser 8400/8500/8550 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? Step 9a Step 9b Visually check the Wiper Assembly blade. Is it OK? Check the purge performance of the purge system. YES NO Circle one 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 - Basic 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. Is the purge mass noticeably less than what is pictured? If YES, inspect the purge hoses for pinches, splits, or tears. Phaser 8400/8500/8550/8560 Color Printer Service Manual A-15