Lexmark X543 Service Manual

							Diagnostic information2-27
Lexmark confidential until announce7525xxx
990.xx Ser vice
This error message indicates that an 
equipment check condition has 
occurred in the specified device, but 
the device is unable to identify the 
exact component failure. 
Note:  can be one of the 
following:
 Duplex option.

991.xx Ser vice
 CardThe specified device has detected an 
equipment check in its controller board.
Service error messages (1XX, 8XX and 9xx) (continued)
Error code Description Action 
						

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Fax error log codes
Fax error log codes
Error code Description Action
000No error occurred during fax
transmissionNo action needed
200 Error occurred when transmitting
training. Check line quality.
 Select a lower ‘Max Speed’.
 value under Fax Send settings
 Adjust the transmit level.
3XX Error occurred when receiving
image data. Check line quality.
 Adjust ‘Receive Threshold’.
 Select a lower ‘Max Speed’ value 
under Fax Receive settings.
4XX Error occurred when sending
image data. Check line quality.
 Adjust ‘Transmit Level’.
 Select a lower ‘Max Speed’ value 
under Fax Receive settings.
5XX Received unknown response from
remote fax device.No action needed. Issue is with the other 
device.
6XX Error occurred when receiving a frame.  Check line quality.
 Adjust ‘Receive Threshold’.
7XX Error occurred when sending a frame.  Check line quality.
 Adjust ‘Transmit Level’.
 Select a lower ‘Max Speed’ value 
under Fax Send settings.
800 Received EOT unexpectedly from
the modem in V34 mode. If error persists disable V34 modulation 
scheme.
802 Too many timeouts occurred
during ECM reception. If error persists disable ECM mode.
803 Fax cancelled by user No action needed.
804 Unexpectedly received a disconnect 
command from the remote end. Check line quality.
 Adjust Transmit Level/Receive 
Threshold values.
 Remote device could be requesting an 
unsupported feature.
805 Remote fax device failed to respond to 
the DCS command. Adjust Transmit Level/Receive 
Threshold values.
 Remote device could be 
malfunctioning.
808 T1 timeout occurred when trying to 
establish a connection with a remote 
fax device. Adjust Transmit Level/Receive 
Threshold values.
809 T2 Timeout occurred due to loss of 
command/response synchronization. Adjust Transmit Level/Receive 
Threshold values. 
						

							Diagnostic information2-29
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80A T5 Timeout occurred when transmitting 
image data to remote fax device. Check line quality.
 Adjust ‘Transmit Level’.
 Select a lower ‘Max Speed’value under 
Fax Send settings.
80B Too many errors when transmitting in 
ECM mode. Check line quality.
 Adjust ‘Transmit Level’.
 Select a lower ‘Max Speed’value under 
Fax Send settings.
80C Remote device failed to respond to the 
CTC command. Select a lower ‘Max Speed’ value 
under Fax Send settings.
 Adjust ‘Transmit Level’.
80D Received too many requests from 
remote end to repeat the previous 
command sent. Check line quality.
 Adjust ‘Transmit Level’.
 Check if line conditions on remote end 
will facilitate a good connection.
80E Functional limitation- Remote fax 
device does not support G3 receive 
capability.No action needed. Issue with the remote 
device.
811 Failed to detect a fax device at the 
remote end. Verify MFD is answering to fax call and 
not a voice call.
 Decrease value of ‘Rings To Answer’ 
setting.
812 No more data rates available in V34 
modulation scheme. Adjust to a lower modulation scheme.
813 Timeout occurred after waiting too long 
to receive a good frame.  Adjust “Receive Threshold”.
814 Tried too many times at selected speed 
using V34 modulation scheme. Adjust ‘Transmit Level’.
 Adjust to a lower modulation scheme.
815 Fax transmission was interrupted due 
to power failure. Troubleshoot MFP if error persists. See 
“Modem / fax card service check” on 
page 2-70.
818 Fax transmission failed due to 
insufficient memory to store scanned 
image.Adjust ‘Memory Use’ setting to allocate 
more memory for send jobs.
819 Fax transmission failed due to 
insufficient memory to store received 
image.Adjust ‘Memory Use’ setting to allocate 
more memory for receive jobs.
81A A timeout occurred during transmission 
of a page in ECM mode.Select a lower ‘Max Speed’ value under 
Fax Send settings.
880 Failure to transmit training successfully 
in V17, V29, V27 terminal modulation 
schemes. Select a lower “Max Speed” under Fax 
Send settings.
 Adjust the “Transmit Level”.
 Check line quality.
881 Failure to transmit training successfully 
in V33, V29, V27 terminal modulation 
schemes. Select a lower “Max Speed” under Fax 
Send settings.
 Adjust the “Transmit Level”.
 Check line quality.
Fax error log codes (continued)
Error code Description Action 
						

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882 Failure to transmit training successfully 
in V17, V29 terminal modulation 
schemes. Select a lower “Max Speed” under Fax 
Send settings.
 Adjust the “Transmit Level”.
 Check line quality.
883 Failure to transmit training successfully 
in V17,V27 terminal modulation 
schemes. Select a lower “Max Speed” under Fax 
Send settings.
 Adjust the “Transmit Level”.
 Check line quality.
884 Failure to transmit training successfully 
in V29, V27 terminal modulation 
schemes. Select a lower “Max Speed” under Fax 
Send settings.
 Adjust the “Transmit Level”.
 Check line quality.
885 Failure to transmit training successfully 
in V17terminal modulation scheme. Select a lower “Max Speed” under Fax 
Send settings.
 Adjust the “Transmit Level”.
 Check line quality.
886 Failure to transmit training successfully 
in V29 terminal modulation scheme. Select a lower “Max Speed” under Fax 
Send settings.
 Adjust the “Transmit Level”.
 Check line quality.
887 Failure to transmit training successfully 
in V27 terminal modulation scheme. Select a lower “Max Speed” under Fax 
Send settings.
 Adjust the “Transmit Level”.
 Check line quality.
888 Failure to transmit training successfully 
at 2400 bps in V27 terminal modulation 
scheme. Adjust “Transmit Level”.
 Check line quality.
889 Failed to connect at the minimum 
speed supported by the MFP. Adjust “Transmit Level”.
 Incompatible connection.
88A Failed to connect using V.34 
modulation scheme. Check line quality.
 Adjust to a lower modulation scheme.
 Adjust Transmit Level Receive 
Threshold values.
901 No fax tones detected from remote 
end. Verify destination phone number.
 Verify that the remote fax is authorized 
to receive faxes.
902 No dial tone detected.  Check by enabling ‘Behind a PABX’ 
setting.
 Check phone line.
 Check MFD modem hardware.
903 Busy tone detected. Check with remote end if successive 
attempts fail. 
904 Hardware error detected. See “Modem / fax card service check” 
on page 2-70. 
905 A timeout occurred after dialing the 
number and waiting for a response.Check with remote end if successive 
attempts fail. 
906 Fax cancelled by user. No action needed.
Fax error log codes (continued)
Error code Description Action 
						

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907 Modem detected a digital line 
connection.Verify the MFP is connected to an analog 
line. See“Fax transmission service 
check” on page 2-71. 
908 Phone line was disconnected Restore phone line connection.
A00 Received request for unsupported 
function from remote fax device.No action needed.
A01 Received request for unsupported 
image width from remote fax device.No action needed.
A02 Received request for unsupported 
image resolution from remote fax 
device.No action needed.
A03 Received request for unsupported 
compression type from remote fax 
device.No action needed.
A04 Received request for unsupported 
image length from remote fax device.No action needed.
F00 Unknown error occurred. No action needed.
Fax error log codes (continued)
Error code Description Action 
						

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Service checks 
Autocompensator mechanism service check
90x.xx error
920.xx–923.xx—Fuser temperature incorrect
This service check covers fuser temperature errors, including 920.xx, 921.xx, 922.xx, and 923.xx. Step Questions / actions Yes No
1Turn the printer off, and then remove the rear 
shield. See “Rear shield removal” on 
page 4-7. Check the cable at JSP1 on the 
controller board for proper connection.
Is the cable properly connected?Go to step 3.  Properly connect the cables, 
and POR the printer.
Go to step 2.
2Did the printer function correctly after 
reconnecting the cables?Problem resolved. Go to step 3.
3Turn the printer on, and then verify the 
following approximate values at JSP1:
Are the values approximately correct?Replace the 
autocompensator 
mechanism. See 
“Autocompensator 
mechanism (ACM)—
standard tray removal” on 
page 4-12.Replace the controller 
board. See “Controller 
board removal” on 
page 4-16. 
Step Questions / actions Yes No
1Turn the printer off, and remove the rear shield. 
See “Rear shield removal” on page 4-7. 
Check the cable connections.
Are all the cable connections secure?Replace the controller 
board. See “Controller 
board removal” on 
page 4-16. Securely make all the 
connections. POR the 
printer.
Step Questions / actions Yes No
1Check the clearance around the printer. See 
“Clearances” on page 1-5.
Does the error clear?Problem resolved. Make sure the proper 
clearance is maintained.
2Check the fuser connections on the fuser, at 
JFUSES1 on the controller board, and the AC 
connection at the LVPS.
Are the connections correct?Replace the fuser. See 
“Fuser assembly removal” 
on page 4-19.Problem resolved.
JSP1
Pin Value Pin Value
2 +24 V dc 10 +5 V dc
4 +24 V dc 13 Ground
6 Ground 15 +5 V dc
7 Ground 16 Ground
8 Ground 
						

							Diagnostic information2-33
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925.01—Fan error service check
3Turn the printer on and check following values 
on JFUSES1.
Are the values approximately correct?Replace the fuser assembly. 
See “Fuser assembly 
removal” on page 4-19.Replace the controller 
board. See “Controller 
board removal” on 
page 4-16.
Step Questions / actions Yes No
1Turn off the printer, and remove the rear shield. 
See “Rear shield removal” on page 4-7. 
Unplug the fan cable at JFAN1 and turn the 
printer on. Check the following connectors:
Are the measured values correct?Replace the top cover 
(which includes the fan). 
See “Top cover assembly 
removal” on page 4-9.Replace the controller 
board. See “Controller 
board removal” on 
page 4-16. Step Questions / actions Yes No
JFUSES1
Pin Value
5 +3.3 V dc
6 Ground
8 Ground
9 +3.3 V dc
10 +3.3 V dc
11 Ground
JFAN1
Pin Voltage
1 +3.3 V dc
2 Ground
3 +24 V dc 
						

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930.xx–935.xx—Printhead errors service check
936.xx, 937.xx—Transport motor service check
Step Questions / actions Yes No
1Turn the printer off, and remove the rear shield. 
See “Rear shield removal” on page 4-7. 
Check the cables connected at JMIRR1 and 
JPH1 on the controller board. Check for 
damage.
Are the cables damaged?Replace the printhead. See 
“Printhead removal” on 
page 4-42.Go to step 2.
2Turn the printer on, and verify the following 
values at JMIRR1:
Are the values approximately correct?Replace the printhead. See 
“Printhead removal” on 
page 4-42.Replace the controller 
board. Replace the 
controller board. See 
“Controller board 
removal” on page 4-16.
Step Questions / actions Yes No
1Turn the printer off, and remove the rear shield. 
See “Rear shield removal” on page 4-7. 
Check the cable at JCARB1 for proper 
connection to the controller board
Is the cable properly connected?Reconnect the cable.  Go to step 2.
2Turn the printer on, and then measure the 
values of the cable at JCARB1:
Are the measured voltages correct?Replace the main drive gear 
assembly. See “Main drive 
gear assembly with motor 
removal” on page 4-39. Replace the controller 
board. See “Controller 
board removal” on 
page 4-16.
JMIRR1
Pin Value
2 +3.3 V dc
4 Ground
5+24 V dc
JCARB1
Pin Voltage
4 +24 V dc
6 +24 V dc
8 +24 V dc
9 Ground
12 Ground
13 +24 V dc
15 +24 V dc
17 +24 V dc 
						

							Diagnostic information2-35
Lexmark confidential until announce7525xxx
950.xx EPROM mismatch failure service check
Warning:Replace one of the following components, and perform a POR before replacing a second 
component. Never replace both of the components without performing a POR after installing each 
one, or the printer will be rendered inoperable:
Operator panel assembly
Controller board
Warning:Never install and remove components listed above as a method of troubleshooting components. 
Once a component has been installed in a printer, and the printer is powered on, it cannot be 
used in another printer. It must be returned to the manufacturer.
This error code indicates a mismatch between the operator panel assembly and the controller board.
Autocompensator mechanism service check
Step Questions / actions Yes No
1Have any updates been made to the firmware? Reload the firmware and try 
again.
Go to step 2.Replace the controller board 
with a new, and not 
previously installed 
controller board. See 
“Controller board 
removal” on page 4-16. 
2Did reloading the firmware correct the 
problem?Problem  resolved. Replace the controller board 
with a new, and not 
previously installed 
controller board. See 
“Controller board 
removal” on page 4-16. 
Step Questions / actions Yes No
1Turn the printer off, and remove the rear shield. 
See “Rear shield removal” on page 4-7. 
Check the cable at JSP1 on the controller 
board for proper connection.
Is the cable properly connected?Replace the 
autocompensator 
mechanism. See 
“Autocompensator 
mechanism (ACM)—
standard tray removal” on 
page 4-12. Properly connect the cables, 
and POR the printer.
Go to step 2.
2Did the printer function correctly after 
reconnecting the cables?Problem resolved. Go to step 3.
3Disconnect the cable at JSP1, and verify the 
following approximate values:
Are the values approximately correct?Replace the 
autocompensator 
mechanism. See 
“Autocompensator 
mechanism (ACM)—
standard tray removal” on 
page 4-12.Replace the controller 
board. See “Controller 
board removal” on 
page 4-16. 
JSP1
Pin Voltage Pin Voltage
2 +24 V dc 8 Ground
4 +24 V dc 10 +5 V dc
6 Ground 15 +5 V dc
7 Ground 16 Ground 
						

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Bin full sensor service check
Step Questions / actions Yes No
1Is the input sensor dislodged or damaged? Repair or replace the 
autocompensator 
mechanism. See 
“Autocompensator 
mechanism (ACM)—
standard tray removal” on 
page 4-12. Go to step 2.
2Does the flag rotate freely and interrupt the 
sensor beam when in normal position?Go to step 3. Reposition or replace the 
flag.
3Turn the printer off, and remove the rear shield. 
See “Rear shield removal” on page 4-7. 
Disconnect the cable at JBIN1 on the controller 
board. Turn the printer on, and check the 
voltage values below:
Are the voltage values correct? Problem resolved.  Replace the controller 
board. See “Controller 
board removal” on 
page 4-16.
JBIN1
Pin Voltage
1 +5 V dc
2 +3.3 V dc
3 Ground