Lexmark C736 Service Manual

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2Remove the right cover. See “Right cover 
removal” on page 4-37. Check the cartridge 
motor 1/fuser motor cable (A0 for proper 
connection to the EP drive assembly, for 
pinch points for the cable, or damage to the 
cable or connector.
Is either cable damaged?Replace the cartridge 
motor 1/fuser motor cable. 
See “Cartridge motor 1/
fuser cable removal” on 
page 4-62.Go to step 3.
3Measure the resistance across fuse F7 on the 
system board. 
Is the...

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144.xx—Motor (EP drive assembly middle cartridge) error service check
Step Questions / actions Yes No
11. Turn the printer off.
2. Remove the rear frame cover. See “Rear 
frame cover removal” on page 4-33.
3. Check the cables in connector JCARTP2 
and JCARTS2 (A) (cartridge motor 2/3 
cable) for proper connection to the system 
board, for cable pinch points, and for any 
other damage to the cable or connector.
Is the cable damaged?Replace cartridge motor...

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145.xx—Motor (EP drive assembly bottom cartridge) error service check
3Measure the resistance across fuse F9 on the 
system board. 
Is the fuse blown? Replace the system board. 
See “System board 
removal” on page 4-153.Replace the EP drive 
assembly. See 
“Electrophotographic 
(EP) drive assembly 
removal” on page 4-82.
Step Questions / actions Yes No
11. Turn the printer off.
2. Remove the rear frame cover. See “Rear 
frame cover removal” on page...

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146.xx, 148.xx—Motor (MPF/duplex) error service check
2Remove the right cover. Check the cartridge 
motor 2/3 cable for proper connection to the 
EP drive assembly, pinch points for the cable, 
and damage to the cable or connector (A).
Is either cable damaged?Replace the cartridge 
motor 2/3 cable. See 
“Cartridge motor 2/3 
cable removal” on 
page 4-64. Go to step 3.
3Measure the resistance across fuse F10 on 
the system board. 
Is the fuse blown? Replace...

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2Is the multipurpose feeder damaged? Replace input tray. Go to step 3.
31. Turn the printer off.
2. Remove the rear frame cover. See “Rear 
frame cover removal” on page 4-33.
3. Check the cable in connector JDX1 (A) 
(MP feeder/duplex motor cable) for proper 
connection to the system board, the cable 
for pinch points, and the cable or 
connector for any other damage.
Is the cable damaged?Replace the MPF/duplex 
motor cable. See 
“Multipurpose...

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147.xx, 920.01—POST (power-on self test) aligner error service check
5Check the MPF/duplex gear assembly for 
damage. 
Do the gears turn freely, and are they free of 
damage?Go to step 6. Replace the MPF/duplex 
gear assembly. See 
“Multipurpose feeder 
(MPF)/duplex gear and 
housing removal” on 
page 4-116.
6Measure the resistance across fuse F5 (A) on 
the system board.
Is the fuse blown?Replace the system board. 
See “System board 
removal” on page...

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155.xx—Cam motor error service check
2Check the cable in the connector JFDPCK1 
for pinch points and for any other damage to 
the cable or connector.
Is the cable damaged?Replace paper pick 
mechanism. See “Paper 
pick mechanism 
assembly removal” on 
page 4-127.Go to step 3.
31. Disconnect the cable in connector 
JFDPCK1 and connect the cable from the 
new paper pick mechanism to JFDPCK1.
2. Bring the printer up in Diagnostics Menu 
(turn off the...

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3Check the transport motor cable from the cam 
motor to the motor driver card for poor 
connections or damage.
Is the cable damaged?Replace the transport 
motor cable. See 
“Transport cable 
removal” on page 4-170.Go to step 4.
4Measure the resistance across fuses F12 (A) 
and F13 (B) on the system board.
Is either fuse blown?Replace the system board. 
See “System board 
removal” on page 4-153.Go to step 5.
5Visually inspect the motor driver card.
Is the...

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156.xx—COD (Color On Demand) motor service check
Step Questions / actions Yes No
11. Turn the printer off.
2. Remove the rear frame cover. See “Rear 
frame cover removal” on page 4-33.
3. Check the cable in connector JBOR1 (A) 
on the system board for proper 
connection, for cable pinch points, and for 
any other damage to the cable or 
connector.
Is the cable damaged?Replace the COD 
assembly. See “Color on 
demand assembly 
removal” on page...

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160.xx, 161.xx—Motor Error (option tray 2) service check
Step Questions / actions Yes No
11. Turn the printer off.
2. Reseat option tray 2.
3. Bring the printer up in Diagnostics Menu 
(turn off the printer, press and hold   and 
. and turn on the printer). 
4. Select PRINT TESTS, and press 
Select().
5. Select the Tray 2, and press Select().
6. Select Single, and press Select(). 
Did the page print?Problem resolved. Go to step 2.
21. Turn the printer off....