Xerox 8500DN Service Manual - Page 363

Reference Step 11 Print Service Test 1: Weak and Missing Jets. Are there weak or missing jet(s)? Step 12 Is the customer experiencing vertical bands (not light stripes) in solid color areas? YES NO Circle one YES NO Circle one 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 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 as many as 60 solid fill pages to refresh all of the ink in the printhead reservoir. The repair is now complete! x If No, the repair is complete! Comments: (Xerox U.S. personnel please add all comments into FIST) A completed checklist and sample prints must be returned with each printhead. Xerox reserves the right to refuse reimbursement to service personnel who do not enclose a completed troubleshooting checklist and a sample print with each returned printhead. Please return the following items with the defective printhead: x Two prints of Service Print 1 x This Printhead Troubleshooting Checklist (filled out) x Inventory control "Green Tag" (filled out) x Sample prints that clearly show the observed print quality defect (not applicable for printheads replace because of an error code) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 Service Print 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 74 75 76 77 78 79 80 Weak jet 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 9923-114 Phaser 8400/8500/8550/8560 Color Printer Service Manual A-11