Lexmark C736 Service Manual
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Repair information4-149 5026 Go Back Previous Next 7.Select Quick Test in the Cyan menu, and press Select (). Two pages print. You may have to print these pages several times until you get T (Top Margin) and Z (Skew) aligned. Do not go to step 2 until T and Z are aligned. The first page is similar to the following:
4-150Service Manual 5026 Go Back Previous Next 8.Determine the line under Fine Adjustment that is closest. If the value is beyond the Fine Adjustment scale, use either of the Coarse Adjustment scales. 9.Enter the number determined from the Fine Adjustment scale or the Coarse Adjustment scales on the part of the page for the “T” value. The current value is automatically entered on the sheet. At this point, it should be zero. 10.Enter the “New Cyan T value” on the operator panel using the left and right arrows, and press Select () to save the value. 11.Reprint the Quick Test, and evaluate whether you are at zero changes.
Repair information4-151 5026 Go Back Previous Next 12.Repeat this process for skew (Z). Dont forget to subtract the T value and add the current cyan Z value to obtain the new skew (Z) value. An example is shown below: 13.Continue to follow the directions on the bottom of the first page to find the Cyan Top Margin (T), the Skew (Z), and on the second page of the Quick Test page, the Left Margin (L), Right Margin (R), and Bow (P). 14.Repeat steps 2 through 11 for yellow and magenta. Note: Start each color group by setting the Top Margin, Left Margin, Right Margin, Bottom Margin, Skew, and Bow to zero.
4-152Service Manual 5026 Go Back Previous Next Right bellcrank assembly removal See “Right bellcrank assembly, with spring” on page 7-5 for the part number. 1.Remove the right cover. See “Right cover removal” on page 4-37. 2.Remove the C-clip (A). 3.Remove the right bellcrank assembly. A
Repair information4-153 5026 Go Back Previous Next System board removal See the system board part number for the model you need on page 7-9. Warning: When replacing any one of the following components: •Operator panel assembly •System board •Top access cover assembly Only replace one component at a time. Replace the required component, and perform a POR before replacing a second component listed above. If this procedure is not followed, the printer will be rendered inoperable. Warning: Be careful not to damage the printhead cable when removing the system board. 1.Remove the left cover and the rear left cover. See “Left cover removal” on page 4-21. 2.Remove the rear frame cover. See “Rear frame cover removal” on page 4-33. 3.Remove the hard disk if one is installed. See “Hard drive assembly removal” on page 4-107. 4.Remove all the screws (A) from the left side of the printer so you can remove the system board, including: •USB port connector (1 screw) •Ethernet port connector (1 screws) •Modem shield (1 screws) •Hard disk shield (2 screws) •Ground screw (1 screw) CAUTION This product contains a lithium battery. THERE IS A RISK OF EXPLOSION IF THE BATTERY IS REPLACED BY AN INCORRECT TYPE. Discard used batteries according to the battery manufacturer’s instructions and local regulations.
4-154Service Manual 5026 Go Back Previous Next 5.Disconnect all the cables from the system board. Warning: Do not use tools to remove the printhead ribbon cable (B). A flat ribbon cable can be damaged and should be removed gently by hand. 6.Remove the nine screws (C) from the system board. 7.Remove the system board.
Repair information4-155 5026 Go Back Previous Next Installation notes: 1.Place the system board in position. Note: Check that the mirror motor cable and the printhead cable do not rub against the edges of the frame. 2.Replace the nine screws (A) in the system board in the following order: •Loosely attach the four corners (A1) in a clockwise order, beginning with the left top corner. •Replace the USB connector screw (A2). •Replace the top center, right center side, and left center side (A3). •Tighten the top left corner and top right corner. •Replace the two screws on the center bottom (A4). •Tighten the bottom right and bottom left corners (A1). 3.Route the cables through the access holes on the right side of the printer.
4-156Service Manual 5026 Go Back Previous Next 4.Replace all the screws (B) from the left side of the printer, including: •Ethernet port connector (1 screws) •Modem shield (1 screws) •Hard disk shield (2 screws) •Ground screw (1 screw) Note: Be sure to attach the ground wire (C) to the ground screw. 5.Reconnect all the cables to the system board. Use the diagram below for a guideline. Warning: Be careful reconnecting the printhead ribbon cable (D). It can be damaged and should be handled carefully. A flat ribbon cable can easily be damaged and should be connected gently by hand. 6.Install the hard disk if appropriate. 7.Replace the rear frame cover and the left cover.
Repair information4-157 5026 Go Back Previous Next System board support shield removal See “System board support shield” on page 7-9 for the part number. 1.Remove the system board. See “System board removal” on page 4-153. 2.Remove the right cover. See “Right cover removal” on page 4-37. 3.Pull the cables through the access holes on the right side of the printer. 4.Remove the five mounting screws (A) from the outer left side of the printer. Note: Make a note of the attachment of the printhead ground cable (B) to the fourth screw from the top for later installation. 5.Remove the four screws (C) from the inner right side of the support shield.
4-158Service Manual 5026 Go Back Previous Next 6.Remove the five mounting screws (D) from the top and bottom of the support shield. Note: Only the ribbon and mirror motor cables come through the access holes in the system board support shield. 7.Lower and remove the support shield. Be careful not to damage the ribbon cable that routes through the bottom frame of the printer. Installation notes: 1.Loosely attach the two mounting screws (A). 2.Set the system board support shield in place. Note: Check that the ribbon mirror motor cable (white) and the printhead cable (bottom) do not rub against the edges of the frame.