Lexmark C736 Service Manual

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2.Loosely attach the three printhead mounting screws (B).
Warning:  Do not fully tighten the printhead mounting screws until skew has been adjusted. 
3.Lightly tighten the alignment screw (C). 
4.Feed the ground cable through the hole in bottom leftside frame. 

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5.Replace the system board support shield screws (E): 
a.Loosely attach the two mounting screws (E2)
b.Set the system board support shield in place.
Check that the ribbon mirror motor cable (white) and the printhead cable (bottom) do not rub against 
the edges of the frame.
c.Replace the remaining system board support shield screws in the following order:
•Replace the four screws (E1) from the inner right side of the support shield.
•Tighten the two...

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6.Replace the system board. 
a.Place the system board in position.
Check that the mirror motor cable and the printhead cable do not rub against the edges of the frame.
b.Replace the nine screws (F) in the system board in the following order:
•Loosely attach the four corners (F1) in a clockwise order, beginning with the left top corner.
•Replace the USB connector screw (F2).
•Loosely attach the left center side, top center, and right center side (F3)....

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d.Replace all the screws (G) 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 (H) to the ground screw.
e.Reconnect all the cables to the system board. Use the diagram below for a guideline.
Warning:  Be careful reconnecting the printhead ribbon cable (J). It can be damaged and should be 
handled carefully....

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7.Replace the LVPS.
a.Install the LVPS, and make sure the cable is in the cable guides, and not behind the LVPS.
b.Reconnect the cable to the LVPS.
c.Replace the five LVPS mounting screws.
d.Reconnect the cable in connector JLVPS1 on the system board.
8.Replace the right cover.
a.Slide the right cover up until it locks into position.
Be sure the tab in the top access cover engages the slot in the right cover. 
b.Replace the screw at the bottom of the...

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f.Scroll down to Quick Test, and press Select  . A page similar to this one prints: 

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g.Adjust the printhead alignment screw (A) to change the skew and straighten the image on the 
printout.
If the top right alignment marks are lower than the top left alignment marks, rotate the alignment 
screw counterclockwise a full revolution, and print the Quick Test page. Repeat adjusting the screw 
and printing the Quick Test until the top alignment marks are the same distance from the top of the 
media.
Note:  One rotation of the printhead...

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e.Remove all of the toner cartridges.
f.Tighten the printhead mounting screws in the following order: B1, B2, and B3.
5.Replace the printhead alignment screw cover (C).
Be sure to replace the screw cover so that the notch in the cover faces to the rear of the printer. This 
makes it much easier to remove the next time.
6.Replace the toner cartridges. 
7.Reinstall the transfer module and the photoconductor units.
8.Connect the transfer module cable.  

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Registration (black)
Top Margin
1.Reconnect the power cord to the electrical outlet, but do not turn on the printer yet.
2.Enter Diagnostic mode (press and hold   and  , turn on the printer, and release the buttons when the 
clock graphic displays).
3.Select REGISTRATION, and press Select .
4.Select Quick Test, and press Select   or use the last Quick Test you used to adjust skew.
5.Select Top Margin, and press Select .
6.Adjust the values until both...

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Left Margin
1.Adjust the left margin until the points of the left alignment marks touch the edge of the page.
•Increasing the value ( ) moves the bottom alignment marks up on the page.
•Decreasing the value ( ) moves the bottom alignment marks down on the page.
2.Press Select ( ) to save the value. 
3.Print the Quick Test page, and check the left alignment marks each time until you are satisfied.
Right Margin
1.Adjust the right margin until the points of...