Lexmark C736 Service Manual

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959.00–959.05
Engine Code ErrorInvalid engine code • POR the printer.
• If the error message persists, download the 
engine code again.
• POR the printer again.
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-153.
959.20–959.28
System FailureSystem board failure. • POR the printer.
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-153.
960.00—960.99...

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983.00–983.99
 
Communications ErrorInvalid command parameter by 
specified device.• POR the printer.
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-153.
984.00–984.99
 
Communications ErrorInvalid command parameter by 
specified device.• POR the printer.
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-153.
990.00—990.29
Option ErrorContact your next level...

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Service checks 
110.xx—Mirror motor service check
Step Questions / actions Yes No
1View the Event Log:
1. Turn off the printer, press and hold   and 
 and turn on the printer.
2. Select EVENT LOG, and press 
Select().
3. Select Display Log, and press 
Select(). 
Has an 110.xx error occurred three times or 
more?Replace the printhead. See 
“Printhead removal, 
installation, and 
adjustment” on 
page 4-135. Go to step 2.
2Turn the printer off, and...

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111.xx, 112.xx, 113.xx, and 114.xx—Printhead error service check
Step Questions / actions Yes No
1View the Event Log:
1. Turn off the printer, press and hold   and 
. and turn on the printer
2. Select EVENT LOG, and press 
Select().
3. Select Display Log, and press 
Select(). 
Has an 111.xx,112.xx, 113.xx, or 114.xx error 
occurred three times or more?Replace the printhead. See 
“Printhead removal, 
installation, and 
adjustment” on 
page 4-135. Go to step...

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120.xx—Fuser error service check
Step Questions / actions Yes No
1Check the input voltage switch on the back of 
the low-voltage power supply (LVPS).
Note: Some LVPS FRU do not have switches 
and switch automatically. If your does not 
have a switch, go to step 2.
Is the voltage level (115 V/230 V) properly 
set?Go to step 2. Set the switch for the 
proper country voltage.
21. Remove the fuser. See “Fuser removal” 
on page 4-104. 
2. Check the AC...

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4Remove the rear frame cover. See“Rear 
frame cover removal” on page 4-33. Check 
the cable in connector JFUSER1 (A) (fuser 
DC 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 fuser DC 
cable.See “Fuser DC 
cable removal” on 
page 4-106.Go to step 5.
5Check the cable in connector JLVPS2 (A) for 
proper connection to the system board, the 
cable...

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7Check for the following continuity between the 
DC autoconnect JFUSER1 on the system 
board.
Is continuity present?Go to step 8. Replace the fuser DC 
cable. See “Fuser DC 
cable removal” on 
page 4-106.
8Check for continuity between the following 
pins of the AC autoconnect and the pins of 
the connector that connects to the LVPS. 
Is continuity present?Replace the system board. 
See “System board 
removal” on page 4-153.Replace the fuser AC...

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140.xx, 920.02—Autocomp (tray 1) motor error service check
Step Questions / actions Yes No
1Turn the printer off, and then remove the rear 
frame cover. See “Rear frame cover 
removal” on page 4-33. Check the cable in 
connector JFDPCK1 (A) 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 paper pick 
mechanism. See “Paper 
pick mechanism 
assembly...

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142.xx, 906.01–906.04—Motor (fuser) 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 connectors JCARTP1 
(A) and JCARTS1 (B) (cartridge motor 1/
fuser motor cable) for proper connection 
to the system board, for cable pinch 
points, and for any other damage to the 
cable or connectors.
Is either cable damaged?Replace the...

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143.xx—Motor (EP drive assembly top cartridge 1 motor) error service check
3Measure the resistance across fuse F6 (A) on 
the system board.
Is the fuser 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...