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)...

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,...

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...

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...

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...

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...

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...

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...

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...

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...