Lexmark C736 Service Manual

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3.Replace the remaining system board support shield screws in the following order:
•Replace the four screws (B) from the inner right side of the support shield.
•Tighten the two mounting screws (A) to the top of the support shield.
•Replace the three screws (C) from the bottom of the support shield, and two screws from the top.
•Replace the five mounting screws (D) to the outer left side of the printer. 
Note:  Be sure to connect the printhead ground...

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Toner level sensor removal
See “Toner level sensor” on page 7-11 for the part number.
Note the locations of the toner sensors.
1.Remove the HVPS. See “High-voltage power supply (HVPS) removal” on page 4-108.
2.For the upper two sensors: These sensors are more difficult to reach because the toner is difficult to 
reach: 

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It is difficult to press both locking tabs at the same time. Using a spring hook, press the locking tab (A), and 
disengage the sensor on that side. Press the other locking tab (B), and remove the sensor.
Note:  Use a slight pressure on the cable to keep the first locking tab from relatching, while you disconnect 
the second locking tab.
For the lower two sensors:
Using a spring hook, press the locking tab (C), and disengage the sensor on that side....

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Top cover camshaft assembly removal
See “Top cover camshaft assembly” on page 7-12 for the part number.
1.Open the front cover access door cover.
2.Open the top access cover.
3.Remove the two screws (A) from the links on either side, and disengage the links.
4.Rotate the top access cover back, and place a screwdriver in the cable hole in the frame to hold the cover 
in place. 

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5.Remove the fuser. See “Fuser removal” on page 4-104. 
6.Remove the top screw (B), and loosen the other screw (C). This will allow you to flex the EP drive. 
7.Remove the two screws (D). 

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8.Rotate the camshaft up using the camshaft actuator handles (E) so you can access the other two 
screws (F), and remove them.
9.Flex the EP drive assembly to remove the right side of the camshaft from the boss (G), and lift to remove 
the camshaft. 

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Installation notes:
1.On the left side, align the mark on the idler gear (A) with the mark on the camshaft gear (B), and slide the 
camshaft into place, meshing the gears on the left side.
AB 

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2.Rotate the camshaft up using the camshaft actuator handle (C), and make sure the gears on the right side 
mesh so the first gear tooth of the camshaft aligns with the first two gear teeth of the EP drive actuator 
rack (D).
Note:  Make sure the actuator rack on the EP drive is all the way back.
3.Flex the EP drive on the right to seat the end of the shaft into the boss (E) on the EP drive.
4.Make sure the left and right camshaft brackets are fully...

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5.Rotate the camshaft using the camshaft actuator handle, and replace the two screws (G).
6.Replace the screw in the EP drive that allowed you to flex the EP drive, and tighten the other screw (see 
step 6 of the removal).
7.Replace the top access cover assembly.
8.Replace the fuser, the cartridges, and close the covers. 

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Transfer module removal
See “Transfer module” on page 7-5 for the part number.
1.Disconnect the transfer module cable (A). 
2.Press the two tabs (B) to release the front access cover assembly.
3.Press the two tabs (C) on either side of the transfer module, and lift out the transfer module.
Note:  Leave the photoconductor units on the transport belt when removing. 
Warning:  To avoid damaging the photoconductor drum, place the transfer module with the...