Lexmark X 850 Owners Manual

							Diagnostic information2-23
7500-XXX
291.03
Scanner jam
Remove all 
originals from 
the scanner.Sensor (ADF inverter) off jam After the sensor (ADF registration) turned off during 
the Read operation of the last document, the sensor 
(ADF inverter) did not turn off within the specified 
time. (Simplex mode)
After the ADF registration motor turned on (CCW) 
during the Read operation, the sensor (ADF 
inverter) did not turn off within the specified time. 
(Simplex mode)
After the sensor (ADF registration) turned off during 
the Read operation, the sensor (ADF inverter) did 
not turn off within the specified time. (Duplex mode)
Go to “291.03 Sensor (ADF inverter) off jam” on 
page 2-113.
294.00
Scanner jam
Remove all 
originals from 
the scanner.Sensor (ADF inverter) static 
jamThe system detected that the sensor (ADF inverter) 
is on.
Go to “294.00 Sensor (ADF inverter) static jam” 
on page 2-116.
294.01
Scanner jam
Remove all 
originals from 
the scanner.Sensor (ADF pre-registration) 
on jam side 2After the Invert operation started, the ADF 
registration motor turned on (CW)) at Invert, the 
sensor (ADF pre-registration) did not turn on within 
the specified time.
Go to “294.01 Sensor (ADF pre-registration) on 
jam side 2” on page 2-117.
294.02
Scanner jam
Remove all 
originals from 
the scanner.Sensor (ADF pre-registration) 
off jam on invertingAfter the ADF registration motor turned on at Invert, 
the sensor (ADF pre-registration) did not turn off 
within the specified time.
Go to “294.02 Sensor (ADF pre-registration) off 
jam on inverting” on page 2-119.
295.00
Scanner jam
Remove all 
originals from 
the scanner.Size mismatch Jam (Mix-
size)In Mixed Size Originals, it was detected that the 
Fast Scan Direction size was different from the 
width of the document guide.
Go to “295.00 Size mismatch jam (mix-size)” on 
page 2-121.
295.01
Scanner jam
Remove all 
originals from 
the scanner.Size mismatch Jam (No Mix-
size)The second and subsequent documents are 
different size from the first document.
Go to “295.01 Size mismatch jam (no mix-size)” 
on page 2-123.
295.02
Scanner jam
Remove all 
originals from 
the scanner.Invalid Combine Size Jam An invalid document size combination was 
detected.
Go to “295.02 Invalid combine size jam” on 
page 2-124.
295.03
Scanner jam
Remove all 
originals from 
the scanner.Too Short Size Jam The system detected a document with a length 
shorter than 115mm in the Slow Scan Direction.
Go to “295.03 Too short size jam” on page 2-125.
Error code or 
messageError contentsDescription/Action 
						

							2-24MFP Service Manual 7500-XXX
295.04
Scanner jam
Remove all 
originals from 
the scanner.Too Long Size Jam The system detected a document with the following 
length in the Slow Scan Direction:
• Simplex mode: 672.4mm or longer
• Duplex mode: 480.1mm or longer
Go to “295.04 Too long size jam” on page 2-127.
32
Unsupported 
toner cartridgeToner cartridge RFID failure A toner cartridge of a incorrect specification is 
installed.
Go to “Toner cartridge RFID failure” on 
page 2-196.
34 
Incorrect 
media, check 
tray 1 guides.Tray 1 media size mismatch 
in lengthThe media length detected by the sensor 
(registration) after the media is fed from media 
tray 1 does not match the length detected by media 
tray 1 switch (media size). 
Go to “Tray 1 media size mismatch in length” on 
page 2-198.
34 
Incorrect 
media, check 
tray 2 guides Tray 2 media size mismatch 
in lengthThe media length detected by the sensor 
(registration) after the media is fed from media 
tray 2 does not match the length detected by media 
tray 2 switch (media size).
Go to “Tray 2 media size mismatch in length” on 
page 2-200.
34
Incorrect 
media, check 
tray 3 guidesTray 3 media size mismatch 
in lengthGo to “Tray 3 media size mismatch in length” on 
page 2-204.
34
Incorrect 
media, check 
tray 4 guidesTray 4 media size mismatch 
in lengthGo to “Tray 4 media size mismatch in length” on 
page 2-206.
80
Scheduled 
maintenanceScheduled maintenance 
requiredService is required to maintain printer performance. 
Go to “Scheduled maintenance required” on 
page 2-190.
84 
Insert PC unitPC cartridge set failure The PC cartridge is not installed or is not installed 
properly.
Go to “PC cartridge set failure” on page 2-187.
84 
PC unit 
abnormal PC cartridge RFID failure A PC cartridge of a incorrect specification is 
installed. 
Go to “PC cartridge RFID failure” on page 2-187.
84 
Replace PC 
unitPC cartridge end of life The PC cartridge needs to be replaced. 
Go to “PC cartridge end of life” on page 2-186.
841.00
Service image 
pipeline
Image pipeline ASIC failure The image pipeline for processing the data that 
comes from the scanner, prior to being printed, has 
failed.
Go to “841.00 Image pipeline ASIC failure” on 
page 2-128.
Error code or 
messageError contentsDescription/Action 
						

							Diagnostic information2-25
7500-XXX
842.00
Service 
scanner 
failureScanner communication 
failureController detected a communication failure. 
Communication timeout
Go to “842.00 Scanner communication failure” 
on page 2-128.
842.01
Service 
scanner 
failureScanner communication 
failureController detected a communication failure packet 
timeout.
Go to “842.01 Scanner communication failure” 
on page 2-129.
842.02
Service 
scanner 
failureScanner communication 
failureController detected a communication failure. Invalid 
message checksum
Go to “842.02 Scanner communication failure” 
on page 2-129.
842.03
Service 
scanner 
failureScanner communication 
failureController detected a communication failure. Invalid 
message parameter(s)
Go to “842.03 Scanner communication failure” 
on page 2-130.
842.04
Service 
scanner 
failureScanner communication 
failureController detected a communication failure. Invalid 
message command
Go to “842.04 Scanner communication failure” 
on page 2-130.
842.10
Service 
scanner 
failureScanner unit assembly - ADF 
communication failureCommunication failure occurred between the 
scanner controller card assembly and the ADF 
controller card assembly.
Go to “842.10 Scanner unit assembly - ADF 
communication failure” on page 2-131.
842.11
Service 
scanner 
failureScanner communication 
failure (by scanner)Communication failure occurred between the 
scanner controller card assembly and the RIP card 
assembly.
Go to “842.11 Scanner communication failure 
(by scanner)” on page 2-131.
842.12
Service 
scanner 
failureScanner unit assembly 
communication failureCommunication failure occurred between the 
scanner controller card assembly and the RIP card 
assembly.
Go to “842.12 Scanner unit assembly 
communication failure” on page 2-132.
843.00
Service 
scanner 
failureSensor (scanner HP) failure An failure occurred while counting the pulses of the 
scanner drive motor assembly.
After the Carriage Motor turned on, the sensor 
(scanner HP) did not turn on within the specified 
time.
Go to “843.00 Sensor (scanner HP) failure” on 
page 2-133.
843.01
Service 
scanner 
failureScanner carriage over run 
failureThe scanner carriage has over run.
Go to “843.01 Scanner carriage over run failure” 
on page 2-134.
Error code or 
messageError contentsDescription/Action 
						

							2-26MFP Service Manual 7500-XXX
843.10
Service 
scanner 
failureADF RAM test failure The ADF controller card assembly RAM has failed 
in the read/write operation. 
(It checks at the time of power on)
Go to “843.10 ADF RAM test failure” on 
page 2-134.
843.11
Service 
scanner 
failureADF EEPROM failure The ADF-EEPROM failed during the read/write 
operation.
Go to “843.11 ADF EEPROM failure” on 
page 2-134.
843.12
Service 
scanner 
failureADF pick roll position lift up 
failureAfter the pick roll position motor assembly started 
reverse rotation, the sensor (pick roll position HP) 
did not turn on within the specified time.
After the pick roll position motor assembly started 
normal rotation, the sensor (pick roll position HP) 
did not turn off within the specified time.
Go to “843.12 ADF pick roll position lift up 
failure” on page 2-135.
843.20
Service 
scanner 
failureScanner unit assembly 
connection failureThere is an open circuit in the scanner interface 
cable assembly between the scanner controller card 
assembly and the RIP card assembly.
Go to “843.20 Scanner unit assembly connection 
failure” on page 2-136
843.21
Service 
scanner 
failureScanner unit assembly 
EEPROM failure The scanner unit assembly EEPROM failed during 
the read/write operation.
Go to “843.21 Scanner unit assembly EEPROM 
failure” on page 2-136.
843.22
Service 
scanner 
failureScanner unit assembly 
EEPROM sub system failureThe scanner unit assembly EEPROM failed during 
the read/write operation.
Go to “843.22 Scanner unit assembly EEPROM 
sub system failure” on page 2-137. 
843.23
Service 
scanner 
failureScanner cooling fan failure The scanner cooling fan has failed.
Go to “843.23 Scanner cooling fan failure” on 
page 2-137.
843.24
Service 
scanner 
failureImage processing failure An failure occurred in the image-processing system.
Go to “843.24 Image processing failure” on 
page 2-138.
843.25
Service 
scanner 
failureScanner controller card 
assembly failure 1An internal processing failure occurred in the 
scanner controller card assembly.
Go to “843.25 Scanner controller card assembly 
failure 1” on page 2-138
.
843.26
Service 
scanner 
failureScanner controller card 
assembly failure 2An internal processing failure occurred in the 
scanner controller card assembly.
Go to “843.26 Scanner controller card assembly 
failure 2” on page 2-139.
Error code or 
messageError contentsDescription/Action 
						

							Diagnostic information2-27
7500-XXX
844.00
Service 
scanner 
failureExposure lamp failure A failure has occurred with the exposure lamp.
Go to “844.00 Exposure lamp failure” on 
page 2-139.
844.01
Service 
scanner 
failureWhite reference/exposure 
lamp Illumination failureThe large platen glass is not properly installed or 
missing
The white reference initialization of the scanner unit 
assembly has failed after a POR or the amount of 
light from the exposure lamp is inadequate at the 
start of the scan.
Go to “844.01 White reference/exposure lamp 
illumination failure” on page 2-140.
845.00
Service 
scanner 
failureCCD failure A failure has occurred with the CCD sensor 
assembly.
Go to “845.00 CCD failure” on page 2-142.
845.01
Service 
scanner 
failureCCD initialization (lamp on) 
failureThe CCD does not make a correct output when it 
receives a specified amount of light.
Go to “845.01 CCD initialization (lamp on) 
failure” on page 2-142.
845.02
Service 
scanner 
failureCCD initialization (lamp off) 
failureThe CCD does not make a correct output when light 
is absent.
Go to “845.02 CCD initialization (lamp off) 
failure” on page 2-143.
846.00
Service 
scanner 
failureScanner communication 
failureController detected failures. Scanner download 
timeout
Go to “846.00 Scanner communication failure” 
on page 2-143.
846.01
Service 
scanner 
failureScanner communication 
failureController detected failures. Detected I/O failure
Go to “846.01 Scanner communication failure” 
on page 2-144.
846.10
Service 
scanner 
failureSensor (ADF width APS X) 
failureThe combinations of outputs from the sensor (ADF 
width APS 1), sensor (ADF width APS 2) and sensor 
(ADF width APS 3) are abnormal.
Go to “846.10 Sensor (ADF width APS X) failure” 
on page 2-144.
846.12
Service 
scanner 
failureScanner unit assembly 
software logic failureA software failure was detected by the scanner 
controller card assembly.
Go to “846.12 Scanner unit assembly software 
logic failure” on page 2-146.
846.13
Service 
scanner errorSwitch (platen interlock) open The system detected that the switch (platen 
interlock) is open.
Go to “846.13 Switch (platen interlock) open” on 
page 2-146.
847.00
Service 
modemFax modem failure The configuration ID bit that describes the device’s 
modem does not match the actual modem installed 
in the device.
Go to “847.00 Modem failure” on page 2-147.
Error code or 
messageError contentsDescription/Action 
						

							2-28MFP Service Manual 7500-XXX
847.01
Service faxFax storage The remaining memory available on the hard drive 
is too small.
Go to “847.01 Fax failure” on page 2-148.
848.00
Service 
modemFax modem/configuration ID 
mismatchThe device does not have a modem installed, even 
though its configuration ID indicates that a modem 
should be present.
Go to “848.00 Modem failure” on page 2-148.
849.00
Service hard 
driveHard drive/configuration ID 
mismatchThe device does not have a hard drive installed, 
even though its configuration ID indicates that a 
hard drive should be present.
Go to “849.00 Hard drive failure” on page 2-149.
84
PC unit life 
warningPC cartridge life near end The PC cartridge needs to be replaced soon.
Go to “PC cartridge end of life” on page 2-186.
88 
To n e r  l o wToner cartridge near empty The toner cartridge needs to be replaced soon.
Go to “Toner cartridge near empty” on 
page 2-195.
88
Replace tonerToner cartridge empty  All toner in the toner cartridge is consumed, or toner 
supply is clogged. 
Go to “Toner cartridge empty” on page 2-193.
900.XX
Service RIP 
softwareRIP card assembly software 
failureA failure has occurred in the RIP card assembly 
software. 
Go to “900.XX RIP card assembly software 
failure” on page 2-149.
903.00
Service 
engine errorRAM read/write check failure Read/write of RAM on the printer engine card 
assembly failed.
Go to “903.00 RAM read/write check failure” on 
page 2-149.
904.00
Service 
engine errorNVM data failure A data error of NVM on the printer engine card 
assembly occurred.
Go to “904.00 NVM data failure” on page 2-150.
905.00
Service 
engine errorNVM read/write cannot be 
executed failureRead/write of the NVM on the printer engine card 
assembly failed.
Go to “905.00 NVM read/write cannot be 
executed failure” on page 2-150.
906.00
Service 
engine errorCPU power to access NVM 
failureAn internal process for data write of the NMVM on 
the printer engine card assembly failed.
Go to 
“906.00 CPU power to access NVM failure” 
on page 2-151.
907.00
Service 
engine errorRFID ASIC failure The RFID control circuit failed.
Go to “907.00 RFID ASIC failure” on page 2-151.
908.00
Service 
engine errorPPM data failure An incorrect NVM data is saved on the PPM.
Go to “908.00 PPM data failure” on page 2-152.
Error code or 
messageError contentsDescription/Action 
						

							Diagnostic information2-29
7500-XXX
909.00
Service zero 
crossZero cross failure The zero cross engine has failed.
Go to “909.00 Zero cross failure” on page 2-152.
910.00
Service motor 
errorTransport motor stop failure Due to the malfunction in the control system of the 
printer engine card assembly, the transport motor 
does not stop when media is not transported. 
Go to “910.00 Transport motor stop failure” on 
page 2-153.
911.00
Service motor 
errorTransport motor failure The transport motor does not rotate at the specified 
speed.
Go to “911.00 Transport motor failure” on 
page 2-154.
912.00
Service motor 
errorPC cartridge unit motor 
failure The PC cartridge motor does not rotate at the 
specified speed.
Go to “912.00 PC cartridge unit motor failure” on 
page 2-154.
913.00
Service motor 
errorPrinthead assembly failure Rotation speed of the printhead motor is less than 
the specified value even when the specified time is 
passed after the motor starts rotating.
Light intensity of the LD1 is less than the specified 
value.
Go to “913.00 Printhead assembly failure” on 
page 2-155.
914.00
Service motor 
errorToner add motor assembly 
failure The toner concentration in the PC cartridge does 
not increase when the toner add motor is turned on 
for more than the specified time.
Go to “914.00 Toner add motor assembly failure” 
on page 2-155.
915.00
Service fan 
errorFuser cooling fan failure The fuser cooling fan has failed.
Go to “915.00 Fuser cooling fan failure” on 
page 2-156.
916.00 
Service fan 
errorPC cartridge cooling fan 
failure The PC cartridge cooling fan has failed.
Go to “916.00 PC cartridge cooling fan failure” 
on page 2-157.
917.00
Service fan 
errorLVPS cooling fan failure The LVPS cooling fan has failed.
Go to “917.00 LVPS cooling fan failure” on 
page 2-158.
918.00
Service std. 
bin 1 errorSensor (exit 1 media shift 
HP) failureThe sensor (exit 1 media shift HP) is not turned on 
within the specified period after the exit 1 media 
shift motor is turned on. 
Go to “918.00 Sensor (exit 1 media shift HP) 
failure” on page 2-158.
919.00
Service std. 
bin 2 errorSensor (exit 2 media shift HP) 
failureThe sensor (exit 2 media shift HP) is not turned on 
within the specified time after the exit 2 shift motor is 
turned on.
Go to “919.00 Sensor (exit 2 media shift HP) 
failure” on page 2-159.
Error code or 
messageError contentsDescription/Action 
						

							2-30MFP Service Manual 7500-XXX
919.01
Service std. 
bin 2Exit 2 unit assembly 
connection failure Exit 2 unit assembly is missing or damaged.
Go to “919.01 Exit 2 unit assembly connection 
failure” on page 2-160.
920.00
Service fuser 
errorFuser unit assembly on time 
failureDuring the warm-up period, the control thermistor 
does not detect the ready temperature even when 
the specified time is passed after the main lamp is 
turned on. 
During the standby period, the control thermistor 
does not detect the specified temperature even 
when the specified time is passed after the main 
lamp is on. 
During the standby period, the control thermistor 
does not detect the specified temperature even 
when the specified time is passed after the sub lamp 
in on. 
During idling, after power-on, the control thermistor 
does not detect the idling stop temperature even 
after the specified time is passed. 
During print, the control thermistor does not detect 
the specified temperature even when the specified 
time is passed after the main lamp is turned on. 
During print, the control thermistor does not detect 
the specified temperature even when the specified 
time is passed after the sub lamp is turned on. 
Go to “920.00 Fuser unit assembly on time 
failure” on page 2-161.
921.00
Service fuser 
errorOver heat temperature failure The control thermistor detects a temperature higher 
than the specified value.
The lamp change thermistor detects a temperature 
higher than the specified value. 
Go to “921.00 Over heat temperature failure” on 
page 2-161.
922.00
Service fuser 
errorCenter thermistor failure The center thermistor has failed.
Go to “922.00 Center thermistor failure” on 
page 2-162.
923.00
Service fuser 
errorRear thermistor failure The rear thermistor has failed.
Go to “923.00 Rear thermistor failure” on 
page 2-162.
924.00
Service fuser 
errorPressure roll thermistor 
failureThe pressure roll thermistor has failed.
Go to “924.00 Pressure roll thermistor failure” on 
page 2-162.
925.00
Service fuser 
errorFuser operating temperature 
failure.Fuser temperature is not high enough during 
printing.
Go to “925.00 Fuser operating temperature 
failure” on page 2-163.
927.00
Service PC 
cartridgePC cartridge RFID data write 
failureA data write error occurred on the PC cartridge 
RFID tag in the PC cartridge.
Go to “927.00 PC cartridge RFID data write 
failure” on page 2-163.
Error code or 
messageError contentsDescription/Action 
						

							Diagnostic information2-31
7500-XXX
928.00
Service PC 
cartridgePC cartridge RFID 
communication failureA communication error occurred between the PC 
cartridge RFID tag in the PC cartridge and the RFID 
ASIC on the printer engine card assembly.
Go to “928.00 PC cartridge RFID communication 
failure” on page 2-164.
929.00
Service PC 
cartridgeSensor (ATC) failure The sensor (ATC) failed.
Go to “929.00 Sensor (ATC) failure” on 
page 2-164.
930.00
Service 
printhead 
errorLaser power failure Light intensity of the LD2 is less than the specified 
value.
Go to“930.00 Laser power failure” on 
page 2-164.
932.00
To n e r  
cartridgeToner cartridge RFID data 
write failureA data write error occurred on the toner cartridge 
RFID tag in the toner cartridge.
Go to “932.00 Toner cartridge RFID data write 
failure” on page 2-165.
933.00
To n e r  
cartridgeToner cartridge RFID 
communication failureA communication error occurred between the toner 
RFID tag in the toner cartridge and the RFID ASIC 
on the printer engine card assembly.
Go to “933.00 Toner cartridge RFID 
communication failure” on page 2-165.
939.00
Service RIP 
engine 
Comm.RIP card assembly 
communication failureA communication error occurred between the printer 
engine card and the RIP card assembly.
Go to “939.00 RIP card assembly communication 
failure” on page 2-166.
941.00
Service tray 1 
failureMedia tray 1 lift up / no tray 
failureThe media tray 1 sensor (media level) is not turned 
on within the specified time after the tray 1 media 
feed lift motor is turned on. 
The media tray 1 switch (media size) detected no 
media tray.
Go to “941.00 Media tray 1 lift up / no media tray 
failure” on page 2-166.
942.00
Service tray 2 
failureMedia tray 2 lift up / no tray 
failure The media tray 2 sensor (media level) is not turned 
on within the specified time after the media tray 2 
media feed lift motor is turned on. 
The media tray 2 switch (media size) detected no 
media tray. 
Go to “942.00 Media tray 2 lift up / no media tray 
failure” on page 2-168.
943.00
Service tray 3 
failureMedia tray 3 lift up / no tray 
failureThe tray 3 sensor (media level) is not turned on 
within the specified time after the tray 3 media feed 
lift motor is turned on.
The tray 3 switch (media size) detected no tray.
TTM equipped machines, go to 
“943.00 Tray 3 lift 
up / no tray failure” on page 2-169.
2TM equipped machines, refer to the Options 
Service Manual.
Error code or 
messageError contentsDescription/Action 
						

							2-32MFP Service Manual 7500-XXX
944.00
Service tray 4 
failureMedia tray 4 lift up / no tray 
failureThe tray 4 sensor (media level) is not turned on 
within the specified time after the tray 4 media feed 
lift motor is turned on.
The tray 4 switch (media size) detected no tray.
TTM equipped machines, go to “944.00 Tray 4 lift 
up / no tray failure” on page 2-170.
2TM equipped machines, refer to the Options 
Service Manual.
945.00
Service tray 5 
failureMedia tray 5 lift up / no tray 
failureThe sensor (HCF media level) is not turned on with 
the specified time after the HCF feed lift motor is 
turned on.
Refer to the Options Service Manual.
945.01
Service tray 5 
failureTray 5 HCF NVM R/W failure A read/write error has occurred on the NVM of the 
tray 5 HCF controller card assembly.
Refer to the Options Service Manual.
950.00 
through 
950.29
Service 
NVRAM 
mismatchEPROM mismatch failure This error code indicates a mismatch between the 
operator panel assembly and the interconnect card 
assembly.
Warning: In the event of replacement of any one of 
the following components:
• Operator panel assembly (universal)
• Operator panel controller card assembly
• RIP card assembly
• Interconnect card assembly
Only replace one component at a time. Replace the 
required component, and perform a POR before 
replacing a second component listed above. If this 
procedure is not followed, the printer will be 
rendered inoperable. Never replace two or more of 
the components listed above without a POR after 
installing each one, or the printer will be rendered 
inoperable.
Warning: Never install and remove components 
listed above as a method of troubleshooting 
components. Once a component has been installed 
in a machine, it cannot be used in another machine. 
It must be returned to the manufacturer.
Go to“950.00 through 950.29 EPROM mismatch 
failure” on page 2-172.
Error code or 
messageError contentsDescription/Action