Lexmark C 746 Service Manual

							Diagnostic information2-35
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245.02 Tray 5 pass thru sensor made at 
POR.
Possible causes:
• Paper jam leaving a page over the 
sensor
• Defective pass thru sensor• Check for anything in the paper path that might 
cause the media to jam.
• If the problem persists, go to “245.17—Paper 
Jam service check” on page 2-92.
245.03 Pick timeout from tray 5 exceeded 
without a tray sensor break.
Possible causes:
• Tray 5 incorrect media setting
• Tray 5 incorrect paper loaded
• Tray 5 incorrect media restraint 
setting
• Tray 5 assembly failure
• Aligner failure
• Transport module failure1. Remove all media present in the paper path.
2. Make sure proper media is set for the type of 
paper used in tray 5.
3. Fan the media, and stack flat in tray 5.
4. Properly set the media restraints in tray 5.
If the problem persists, go to “245.03, 245.11—
Paper Jam service check” on page 2-90.
245.05 Possible causes:
• Incorrect media setting
• Incorrect paper loading
• Incorrect media restraint setting
• Tray 5 paper pick mechanism
• Loading card stock from the 
special media tray above the fill 
line1. Ensure proper media is set for the type of paper 
used in tray 5.
2. Fan media, and stack flat in tray 5.
3. Properly set the media restraints in tray 5.
4. Check the pick arm rolls (tires) in tray 5 and 
replace if worn.
If the problem persists, go to “245.05—Paper Jam 
service check” on page 2-90.
245.10 Tray 5 page exits pass thru sensor 
broken early.
Possible causes:
• Defective pass thru sensor
• Faulty cable in connector JOPT1 
on the system board• Make sure the proper media is set for the type of 
paper used in tray 5.
• Check for anything in the paper path that might 
cause the paper to Jam.
• The exits pass thru sensor may not be 
functioning properly. Go to “245.10—Paper 
Jam service check.
245.11 Tray 5 sensor never broke.
Possible causes:
• Incorrect tray 5 media setting
• Incorrect tray 5 paper loading
• Incorrect media restraint setting
• Paper tray failure
• Aligner failure
• Transport belt module failure
• Loading card stock from the 
special media tray above the fill 
line
• High humidity (replace paper)1. Ensure the proper media is set for the type of 
paper used in tray 5.
2. Fan media, and then stack flat in tray 5.
3. Properly set the media restraints in tray 5.
4. Check the pick arm rolls (tires) in tray 5 and 
replace if worn.
If the problem persists, go to “245.03, 245.11—
Paper Jam service check” on page 2-90.
245.17 Tray 5 detected a jam from idle.
Possible causes:
• Paper jam leaves a page over the 
sensor
• Defective input sensor
• Faulty system board• Clear away anything in the paper path that might 
cause the paper to jam.
• If the problem persists, go to “245.17—Paper 
Jam service check. Error code  Description  Action  
						

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245.21 Tray 5 motor stalled.
Possible causes:
• Incorrect paper loading
• Paper pick mechanism failure
• Printer option cable connector 
damaged
• Input option damaged
• System board failure1. Remove all media present in the paper path.
2. Ensure proper media is set for the type of paper 
used.
3. Fan media, and stack it flat in the tray or 
multipurpose feeder.
If the previous actions do not fix the problem, go to 
“242.21, 243.21, 244.21. 245.21, 242.30, 243.30, 
244.30, 245.30—Paper Jam service check” on 
page 2-76.
245.29 Tray 5 is not ready or missing while 
printing.
Possible cause paper tray 5 assembly 
failure.• Make sure that tray 5 is correctly inserted.
• If the problem persists, go to “245.29—Paper 
Jam service check” on page 2-93. 
245.30 Tray 5 page reached pass-through 
sensor early.
Possible cause:
• Incorrect paper loading
• Paper pick mechanism failure
• Pick arm roll damaged
• Defective pass-through sensor
• Input option damaged1. Remove all media present in the paper path.
2. Ensure proper media is set for the type of paper 
used.
3. Fan media, and stack it flat in the tray or 
multipurpose feeder.
If the previous actions do not fix the problem, go to 
“242.21, 243.21, 244.21. 245.21, 242.30, 243.30, 
244.30, 245.30—Paper Jam service check” on 
page 2-76.
245.32 Paper is jammed on tray 5 
pass-through sensor during input 
options warm-up.
Possible damage:
• Obstruction on the pass-through 
sensor
• Damage on the pass-through 
sensor and flag
• Input option damaged
• Damaged option autoconnect 
cable
• Damaged system board•Go to “242.32, 243.32, 244.32, 245.32—Paper 
Jam service check” on page 2-78.
250.03 While feeding from the multipurpose 
feeder, the input sensor did not break.
Possible causes:
• Incorrect media setting
• Incorrect paper loading
• Incorrect media restraint setting
• Transport belt failure
• Paper tray failure1. Remove all media present in the paper path.
2. Ensure proper media is set for the type of paper 
used.
3. Fan media, and stack it flat in the tray or 
multipurpose feeder.
4. Properly set media restraints in the paper tray. 
5. Replace the paper tray.
If the problem persists, to “200.11, 250.03—Paper 
Jam error service check” on page 2-64.
250.05 While feeding from the multipurpose 
feeder, the input sensor is not made.
Possible causes:
• Incorrect media setting
• Incorrect paper loading
• Incorrect media restraint setting
• Multipurpose feeder pick 
mechanism failure
• System board failure1. Remove all the media present in the paper path.
2. Ensure proper media is set for the type of paper 
used.
3. Fan media, and stack it flat in the tray or 
multipurpose feeder.
4. Properly set media restraints in the paper tray.
5. Check the MP feeder pick tires and clean if 
necessary.
6. Replace the paper tray.
If the previous actions do not fix the problem, go to 
“146.xx, 148.xx—Motor (MPF/duplex) error 
service check” on page 2-55 Error code  Description  Action  
						

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250.21 Multipurpose feeder motor stalled.
Possible causes:
• Multipurpose feeder motor failure
• Cabling failure
• Multipurpose feeder gear 
assembly failure
• System board failure
• Defective media present sensor1. Remove all the media present in the paper path.
2. Ensure proper media is set for the type of paper 
used.
3. Fan media, and stack it flat in the tray or 
multipurpose feeder.
4. Properly set media restraints in the multipurpose 
feeder.
If the previous actions do not fix the problem, go to 
“146.xx, 148.xx—Motor (MPF/duplex) error 
service check” on page 2-55. Error code  Description  Action  
						

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9xx service error messages
900.00–900.99
Software Error 
(except 900.05)Unrecoverable RIP software error.  Go to “900.00–900.99 (except 900.05)—System 
software error service check” on page 2-93. 
900.05 
Software Error.Transfer module has failed • POR the printer.
• If the error message persists, go to “900.05—
Transfer module error service check” on 
page 2-96. 
902.01–902.99 
Engine Software Error
(except 902.59 and 
902.60)Unrecoverable system software 
errors. • POR the printer. 
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-155. 
902.59 
ErrorRIP NVRAM MGR problem.  POR the printer.
If the error message persists, go to “902.59—
Engine software error, NVRAM MGR problem 
service check” on page 2-96. 
902.60
ErrorError communicating with cartridge. 1. POR the printer.
2. If the error message persists, check for the 
correct cartridges.
3. Replace the cartridges.
903.01–903.15 
Engine Software ErrorUnrecoverable system software 
errors. • POR the printer. 
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-155. 
904.01–904.04
Software ErrorUnrecoverable system software 
errors. • POR the printer. 
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-155. 
905.00–905.99 
Software ErrorUnrecoverable system software 
errors. • POR the printer. 
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-155. 
910.xx 
Engine Software ErrorRIP software error interface violation • POR the printer.
• If the error persists, replace the system board. 
See “System board removal” on page 4-155.
920.01 
POST ErrorMultipurpose feeder/duplex motor 
assembly not connected.• POR the printer.
• If the error message persists, go to “147.xx, 
920.01—POST (power-on self test) aligner 
error service check” on page 2-57.
920.02 
POST ErrorTray 1 motor not connected. • POR the printer.
• If the error message persists, go to “140.xx, 
920.02—Autocomp (tray 1) motor error 
service check” on page 2-49.
920.03 
POST Error
Transfer module not connected. • POR the printer.
• If the error message persists, go to “920.03, 
920.25—Transfer Module Missing or not 
connected service check” on page 2-97. Error code  Description  Action  
						

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920.04 
POST ErrorFuser motor not connected. • POR the printer.
• If the error message persists, go to “920.04—
POST (power-on self test) fuser motor not 
connected error service check” on 
page 2-97.
920.05 
POST ErrorPrinthead motor not connected. • POR the printer.
• If the error message persists, go to “920.05—
POST (power-on self test) printhead motor 
not connected error service check” on 
page 2-98.
920.06 
POST ErrorInput sensor not connected. • POR the printer.
• If the error message persists, go to “920.06—
Input sensor service check” on page 2-99.
920.07 
POST ErrorNarrow media sensor not connected. • POR the printer.
• If the error message persists, go to “920.07—
POST (power-on self test)—Narrow media 
sensor error service check” on page 2-99.
920.08 
POST ErrorExit sensor not connected. • POR the printer.
• If the error message persists, go to “920.08—
Exit sensor service check” on page 2-100.
920.09
POST ErrorFour toner sensors are not connected. • POR the printer.
• If the error message persists, go to “920.09—
POST (power-on self test)—Four toner 
sensors not connected error service check” 
on page 2-102.
920.10
POST ErrorThree toner sensors are not 
connected.• POR the printer.
• If the error message persists, go to “920.10—
POST—Three toner sensors not connected 
error service check” on page 2-103.
920.11
POST ErrorTwo toner sensors are not connected. • POR the printer.
• If the error message persists, go to “920.11—
POST (power-on self test)—Two toner 
sensors not connected error service check” 
on page 2-104.
920.12
POST ErrorOne toner sensor is not connected. • POR the printer.
• If the error message persists, go to “920.12—
POST (power-on self test)—One toner 
sensor not connected error service check” 
on page 2-105.
920.13 
POST ErrorCartridge motor 1 (top) not connected. • POR the printer.
• If the error message persists, go to “920.13—
POST (power-on self test) cartridge motor 1 
not connected error service check” on 
page 2-106.
920.14 
POST ErrorCartridge motor 2 (middle) is not 
connected.• POR the printer.
• If the error message persists, go to “920.14—
POST (power-on self test)—Cartridge motor 
2 not connected error service check” on 
page 2-107.
920.15 
POST ErrorBad transfer module NVRAM data. • POR the printer.
• If the error message persists, go to 
“920.15, 
920.20—POST (power-on self test)—Bad 
transfer module NVRAM data error service 
check” on page 2-108. Error code  Description  Action  
						

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920.16 
POST ErrorBad printhead NVRAM data. • POR the printer.
• If the error message persists, go to “920.16—
POST (power-on self test)—Bad printhead 
NVRAM data error service check” on 
page 2-108.
920.17 
POST ErrorOutput bin cable not connected. • POR the printer.
• If the error message persists, go to “920.17—
POST (power-on self test)—Output bin cable 
not connected error service check” on 
page 2-109.
920.18 
POST ErrorCartridge motor 3 (bottom) is not 
connected.• POR the printer.
• If the error message persists, go to “920.18—
POST (power-on self test)—Cartridge motor 
3 not connected error service check” on 
page 2-110.
920.19 
POST ErrorStepper motor not connected. • POR the printer.
• If the error message persists, go to “920.19—
POST (power-on self test)—Transfer module 
stepper motor not connected error service 
check” on page 2-110.
920.20
POST ErrorIncompatible transfer module. • POR the printer.
• If the error message persists, go to “920.15, 
920.20—POST (power-on self test)—Bad 
transfer module NVRAM data error service 
check” on page 2-108.
920.21
POST Error+24 V power supply failure. • POR the printer.
• If the error message persists, replace the low-
voltage power supply. See “Low-voltage 
power supply (LVPS) removal” on 
page 4-119.
920.22
POST ErrorFuser bubble sensor is not connected. If the error message persists, go to “Bubble 
sensor service check” on page 2-122.
920.23
POST ErrorDuplex motor is not connected. • POR the printer.
• If the error message persists, go to “920.23—
POST (power-on self test)—Duplex motor 
not connected error service check” on 
page 2-113.
920.25
POST ErrorBad temperature and humidity sensor. • POR the printer.
• If the problem persists, go to “920.03, 920.25—
Transfer Module Missing or not connected 
service check” on page 2-97.
920.27
POST ErrorOption board ID unknown. If the error message persists, go to “920.27, 
920.28, 920.29—POST (power on self test) 
option tray error service check” on page 2-114.
920.28
POST ErrorOption type unknown. If the error message persists, go to “920.27, 
920.28, 920.29—POST (power on self test) 
option tray error service check” on page 2-114.
920.29
POST ErrorOption product ID unknown. If the error message persists, go to “920.27, 
920.28, 920.29—POST (power on self test) 
option tray error service check” on page 2-114. Error code  Description  Action  
						

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920.30
POST ErrorOption sensor disconnected. Use the following list to determine which service 
check to use:
•Tray 2—Go to “242.02—Paper Jam service 
check” on page 2-71.
•Tray 3—Go to “243.02—Paper Jam service 
check” on page 2-78.
•Tray 4—Go to “244.02—Paper Jam service 
check” on page 2-84.
•Tray 5—Go to “245.02—Paper Jam service 
check” on page 2-89.
920.31
POST ErrorOption hardware error (generic) Contact your next level of support.
920.32 MPF paper present sensor not 
connected• POR the printer.
• If the error message persists, go to “920.32—
MPF paper present sensor not connected 
service check” on page 2-114.
925.01 
Fan ErrorFan has stalled. • POR the printer. 
• If the error message persists, go to “925.01, 
925.03, 925.05—Fan error service check” on 
page 2-114.
925.02
Blower ErrorBlower has stalled. • POR the printer.
• If the error message persists, go to “925.02, 
925.04, 925.06—Cartridge cooling fan error 
service check” on page 2-115.
925.03
Fan ErrorFan has stalled. • POR the printer. 
• If the error message persists, go to “925.01, 
925.03, 925.05—Fan error service check” on 
page 2-114.
925.04
Blower ErrorBlower has stalled. • POR the printer.
• If the error message persists, go to “925.02, 
925.04, 925.06—Cartridge cooling fan error 
service check” on page 2-115.
925.05 
Fan ErrorFan has stalled. • POR the printer. 
• If the error message persists, go to “925.01, 
925.03, 925.05—Fan error service check” on 
page 2-114.
925.06
Blower ErrorBlower has stalled. • POR the printer.
• If the error message persists, go to “925.02, 
925.04, 925.06—Cartridge cooling fan error 
service check” on page 2-115.
945.01 
Transfer RollYellow transfer roll has failed. • POR the printer. 
• If the error message persists, go to “945.xx, 
947.xx—Transfer roll error service check” on 
page 2-116.
945.02 
Transfer RollCyan transfer roll has failed. • POR the printer.
• If the error message persists, go to “945.xx, 
947.xx—Transfer roll error service check” on 
page 2-116.
945.03 
Transfer RollMagenta transfer roll has failed. • POR the printer. 
• If the error message persists, go to “945.xx, 
947.xx—Transfer roll error service check” on 
page 2-116. Error code  Description  Action  
						

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945.04 
Transfer RollBlack transfer roll has failed. • POR the printer. 
• If the error message persists, go to “945.xx, 
947.xx—Transfer roll error service check” on 
page 2-116.
947.01 
Transfer RollYellow transfer roll has failed. • POR the printer.
• If the error message persists, go to “945.xx, 
947.xx—Transfer roll error service check” on 
page 2-116.
947.02 
Transfer RollCyan transfer roll has failed. • POR the printer. 
• If the error message persists, go to “945.xx, 
947.xx—Transfer roll error service check” on 
page 2-116.
947.03 
Transfer RollMagenta transfer roll has failed. • POR the printer. 
• If the error message persists, go to “945.xx, 
947.xx—Transfer roll error service check” on 
page 2-116.
947.04 
Transfer RollBlack transfer roll has failed. • POR the printer. 
• If the error message persists, go to “945.xx, 
947.xx—Transfer roll error service check” on 
page 2-116.
950.00–950.29
NVRAM FailureA mismatch between the operator 
panel assembly and the system 
board.• POR the printer.
• If the error message persists, go to “950.00–
950.29—EPROM mismatch failure” on 
page 2-118
951.01–951.99 
NVRAM FailureSystem board NVRAM failure. • POR the printer.
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-155.
952.01–952.99 
NVRAM ErrorCRC error has occurred. This is 
recoverable.Perform a POR to clear the error.
953.01–953.99 
NVRAM FailureOperator panel assembly NVRAM 
failure.• POR the printer. 
• Replace the operator panel assembly if the error 
message persists. See “Operator panel 
assembly removal (C746)” on page 4-34.
954.01–954.99
NVRAM FailureSystem NVRAM failure. • POR the printer.
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-155. 
955.01–955.99 
Code FailureSystem board memory failure. • POR the printer. 
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-155. 
956.01–956.99 
System Card FailureProcessor failure. • POR the printer. 
• If the error message persists, go to “956.xx—
System board failure service check” on 
page 2-119.
957.00–857.99
System FailureASIC failure. • POR the printer.
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-155. Error code  Description  Action  
						

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958.01–958.99 
Memory FailureProcessor failure. • POR the printer.
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-155. 
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 4-155.
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 4-155.
960.00—960.99 
Memory ErrorMemory failure. • POR the printer.
• If the error message persists, RAM soldered on 
board is bad. Replace the system board. See 
“System board removal” on page 4-155.
961.00–961.99 
Memory FailureMemory failure. • POR the printer. 
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-155. 
962.00–962.99
Memory FailureMemory failure. • POR the printer.
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-155.
963.00–963.99
Memory FailureMemory failure. • POR the printer.
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-155.
964.00–964,88
Emulation ErrorDownload emulation CRC error. • POR the printer.
• If the error message persists, download code a 
second time.
975.00–975.99
Network ErrorUnrecognized network port. Contact your next level of support.
976.00–976.99
Network ErrorUnrecoverable software error in 
network port.Contact your next level of support.
978.00–978.99
Network ErrorBad checksum while programming 
network portContact your next level of support.
979.00–979.99
Network ErrorFlash parts failed while programming 
network port.Contact your next level of support.
980.00–980.99
 
Communications ErrorUnreliable communications with 
specified device.• POR the printer.
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-155. 
981.00–981.99
 
Communications ErrorProtocol violation by specified device. • POR the printer.
• If the error persists, replace the system board. 
See 
“System board removal” on page 4-155. Error code  Description  Action  
						

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982.00–982.12
 
Communications ErrorCommunications error by specified 
device.1. Turn the power off.
2. Remove, and reinstall the option.
3. Turn the main power back on.
4. Check all option interface connections if the 
problem remains.
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 4-155.
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 4-155.
990.00—990.29
Option ErrorContact your next level of support.
991.00–991.29
 ErrorSpecified device has detected an 
error.• POR the printer.
• If the error message persists, replace the 
system board. See “System board removal” 
on page 4-155.
1565 Emul Error Load 
Emul Option
In IRsThe DLE version contained in the firmware card will not function with the printer code. The 
message automatically clears in 30 seconds and the DLE is disabled. Download the correct 
version of the DLE. Error code  Description  Action