Printhead alignment Warnings: Whenever a printhead is replaced, it is necessary to perform the Mechanical alignment. Then, if a black printhead is replaced, perform the Black Printhead electronic alignment on page 6 and the Color Printhead electronic alignment on page 7. If a yellow, cyan, or magenta printhead is replaced, perform the Color Printhead electronic alignment on page 7. Do not loosen or replace more than one printhead at a time to retain factory settings. The printhead alignment assemblies must be removed once the mechanical alignment is completed. The printhead comes with two printhead alignment assemblies. Mechanical alignment CAUTION When you see this symbol, there is a danger from hazardous voltage in the area of the product where you are working. Unplug the product before you begin, or use caution if the product must receive power in order to perform the task. 1. Turn the printer off. 2. Remove the top cover. See Additional information top cover removal on page 8. P/N 14G0692 1 of 11
3. Determine which printhead to remove. 4. Align the printhead alignment assembly locating pin (A) with the hole in the printer frame and the attachment screw (B) with the screw hole (shown without the printhead for clarity). The adjustment thumbscrew (C) should be facing the closest mounting beam. P/N 14G0692 2 of 11
5. Install one printhead alignment assembly (D) in the front and the other (E) in the rear of the selected printhead. 6. Screw the printhead alignment assembly to the printer frame. 7. Finger tighten the adjustment screw until the end of the screw is pressing firmly against the mounting beam. 8. Disconnect the printhead motor cable (F) at the system board. 9. Disconnect the color-keyed printhead cable (G) on top of the printhead. P/N 14G0692 3 of 11
10. Remove the three printhead mounting screws (H), and remove the printhead. 11. Lift the old printhead out, leaving the printhead alignment assemblies in place. Note: Untwist the printhead motor cables before placing the printhead assembly into the printer. 12. Install the new printhead assembly, reconnect the printhead motor cable into the system board, and reconnect the color keyed printhead cable into the top of the printhead. Note: Replace the printhead mounting screws, but do not tighten them yet. 13. With one hand, bias the new printhead against the front and rear adjustment screws of the printhead alignment assembly. Note: Using a consistent force on the front and back of the printhead is important and will reduce the number of interations. P/N 14G0692 4 of 11
14. While maintaining bias pressure, tighten the right rear printhead mounting screw. Then tighten the front screw followed by the left rear screw. 15. Securely close the front cover assembly. 16. Print the Mechanical Alignment Test page: a. Enter Diagnostics Mode (Turn the printer off, press and hold and, turn on the printer, and release the buttons when Performing Self Test displays). b. Select MISCELLANEOUS TESTS, and then select Printhead Inst. The Mechanical Alignment Test page prints and can be used to determine the printhead alignment. This page contains information for black (K), magenta (M), cyan (C), and yellow (Y) printheads. c. Look at the line pertaining to the color of printhead you are replacing. The goal is to get the vertical line that runs from REAR SIDE to FRONT SIDE between 1 and -1 for both front and rear. For example, the following is a sample of the magenta FRONT SIDE with the vertical line at +5. d. If the line is outside of this range, turn off the printer, loosen the printhead mounting screws, and turn the adjustment screw of the printhead alignment assembly as indicated by the Mechanical Alignment Test page. In the example above, the vertical line is at +5. Therefore, turn the front adjustment screw clockwise five full turns. If the vertical line had been at -5 it would indicate you should turn the adjustment screw five turns in a counterclockwise direction. After adjusting the screw for the front and similarly determining the adjustment and making it for the back, go to step 14. e. Repeat steps 14 through 16 as necessary until the line is within 1 and -1 on both ends. 17. Remove both printhead alignment assemblies from the printer. Warning: Leaving the assemblies in the printer can cause damage to the printer. 18. Press Back ( ) to return to the main Diagnostic Menu. 19. Perform the electronic alignment(s): If a Black printhead is replaced, perform the Black Printhead electronic alignment on page 6 and then the Color Printhead electronic alignment on page 7. If a magenta, cyan, or yellow printhead is replaced, perform only the Color Printhead electronic alignment on page 7. P/N 14G0692 5 of 11
Black Printhead electronic alignment After replacing the black printhead: 1. Select REGISTRATION from the Diagnostic Menu. 2. Select Quick Test. 3. Set the top, bottom, left, and right margin in that order. The margins are set when the tip of the triangle touches the edge of the page. The print registration range is: Top Margin: -25 to +25 Increasing the value moves the image down the page. Always adjust the top before the bottom margin. Bottom Margin: -25 to +25 Increasing the value stretches the image toward the bottom of the page. Right Margin: -15 to +15 Increasing the value moves the image to the left on the page. Always adjust the right before the left margin. Left Margin: -15 to +15 Increasing the value stretches the image toward the left margin. Note: Adjusting the Top and Right margins moves the entire image. Adjusting the Bottom and Left margins causes the image to expand or compress. It is easier to adjust the Top and Right margins first, then adjust the Bottom and Left. 4. Perform the Color Printhead electronic alignment on page 7 for all colors (magenta, cyan, and yellow). P/N 14G0692 6 of 11
Color Printhead electronic alignment After replacing a color printhead: 1. Select Alignment from the Diagnostics Menu. 2. Select the color of printhead you are replacing. 3. Select Quick Test. Test pages are printed. 4. Adjust the Step 1 settings, based on the Test pages. Follow Step 1 of the instruction on the Test pages. The goal is to change the values until the Test page shows A is within ±1 from B. Note: If fine adjustment lines do not line up, then use coarse alignment. For Step 1 (top margin), press or on the operator panel to adjust the top margin. Press to submit the change. Press or to adjust the right margin. Press to submit the change. After each adjustment, print another set of Test pages by pressing and selecting Quick Test to verify the change. Repeat Step 1 until A is within ±1 from B, then go to step 2. 5. Adjust the Step 2 settings. Follow Step 2 of the instructions on the Test pages. The goal is to change the value until the Test page shows A and B are within ±1. For Step 2 (top margin), press or to adjust the top margin. Press to submit the change. Press or to adjust the right margin. Press to submit the change. After each adjustment, print the Quick Test pages to verify the change. Repeat Step 2 until A and B are within ±1, then go to step 3. 6. Adjust the Step 3 settings. Follow Step 3 of the instructions on the Test pages. The goal is to change the value for both the left and right margins until the Test page shows C and D within ±6. After each adjustment, print another set of Test pages to verify the change. Round any fractional numbers up to the nearest whole number. For example: (1+2)/2 = 1.5 rounds to 2. Repeat Step 3 until C and D are within ±6. When they are, you are done. 7. Exit Diagnostics mode. P/N 14G0692 7 of 11
Additional information top cover removal 1. Remove the redrive cap. 2. Remove the right light shield screw (A) and screw (B). Also release (C). 3. Remove the right light shield. 4. Remove the five top cover mounting screws (D) from the front of the printer. P/N 14G0692 8 of 11
5. Remove the top cover screws (E) from the rear of the printer. 6. Open the MPF, and remove the top cover screw (F) from the left side of the printer. 7. Remove four screws (G) holding the outer system board shield. P/N 14G0692 9 of 11
8. Disconnect the cable from J2 (H) on the system board, and pull the cable through the inner system board shield. 9. Clip and remove the cable tie (I). 10. Remove the autoconnect cable (J) from the cable retainer (K). 11. Remove the top cover. P/N 14G0692 10 of 11
Installation notes Warnings: Be sure the cables are in the cable retainer (A). Be sure the cables are not pinched by the top cover ribs against the indicated surfaces (B) of the printer frame. Be sure to replace the cable tie (C). Place the cover carefully over the upper redrive diverter to avoid damage. P/N 14G0692 11 of 11