Code: A0-01
Description:
PCU PWB ROM error
Causes:
The firmware version-up is not completed properly by interruption of the power during the version-up operation, etc. ROM trouble.
Remedy:
Use SIM49-1 to perform the version-up procedure again. ROM trouble.
Code: A0-02
Description:
SCU PWB ROM error
Causes:
The firmware version-up is not completed properly by interruption of the power during the version-up operation, etc. ROM trouble.
Remedy:
Use SIM49-1 to perform the version-up procedure again. ROM trouble.
Code: A0-10
Description:
MFP PWB ROM error
Causes:
Firmware combination error between the MFP and the image ROM (color correction ROM).
Remedy:
Upgrade the firmware versions of the MFP and the image ROM (color correction ROM).
Code: A0-11
Description:
Firmware version inconsistency (MFP - PCU)
Causes:
Firmware combination error between the MFP and the PCU.
Remedy:
Check the combination between the MFP and the PCU.
Code: A0-12
Description:
Firmware version inconsistency (MFP - SCU)
Causes:
Firmware combination error between the MFP and the SCU.
Remedy:
Check the combination between the MFP and the SCU.
Code: A0-20
Description:
MFP firmware version and EEPROM data version inconsistency
Causes:
Inconsistency between the MFP firmware version and the EEPROM data version.
Remedy:
Check the combination of the firmware.
Code: A0-21
Description:
PCU firmware version and EEPROM data version inconsistency
Causes:
Inconsistency between the PCU firmware version and the EEPROM data version.
Remedy:
Check the combination of the firmware.
Code: A0-22
Description:
SCU firmware version and EEPROM data version inconsistency
Causes:
Inconsistency between the SCU firmware version and the EEPROM data version.
Remedy:
Check the combination of the firmware.

Code: C1-10
Description:
Main charger trouble (BK)
Causes:
The main charger unit (BK) is not installed properly. There is an abnormality in the main charger unit. Disconnection of the high voltage PWB connector. Breakage of the high voltage harness. MC/DV PWB trouble. PCU PWB trouble
Remedy:
Check the output of the main charger with SIM8-2. Check disconnection of the main charger./Replace. Check disconnection of the high voltage PWB. connector. /Replace. Replace the MC/DV PWB. Replace the PCU PWB.
Code: C1-14
Description:
Main charger trouble (Color)
Causes:
The main charger unit (CMY) is not installed properly. There is an abnormality in the main charger. Disconnection of the high voltage PWB connector. Breakage of the high voltage harness. MC PWB trouble. PCU PWB trouble
Remedy:
Check the output of the main charger with SIM8-2. Check disconnection of the main charger./Replace. Check disconnection of the high voltage PWB connector. /Replace. Replace the MC PWB. Replace the PCU PWB.
Code: C4-00
Description:
PTC trouble
Causes:
The PTC unit is not properly installed. PTC unit trouble. TC PWB trouble. PCU PWB trouble. Connector, harness connection trouble.
Remedy:
Replace the PTC unit. Replace the secondary transfer PWB. Replace the PCU PWB. Check connection of the connector and the harness.
Code: E7-01
Description:
MFP image data error
Causes:
Image data transfer error in the MFP PWB. MFP PWB trouble.
Remedy:
Check connection of the connector and the harness of the MFP PWB. Replace the MFP PWB.
Code: E7-03
Description:
HDD trouble
Causes:
Connector, harness connection trouble in the MFP PWB and HDD. HDD (error file management area) data abnormality (FAT breakage). MFP PWB trouble.
Remedy:
Check connection of the connector and the harness of the MFP PWB and HDD. Use SIM62-2, 3 to check read/write operations of the HDD. Replace the HDD. Replace the MFP PWB.
Code: E7-04
Description:
HDD-ASIC error
Causes:
HDD-ASIC trouble. An error occurs in the HDD-ASIC self test when booting.
Remedy:
Replace the MFP PWB.
Code: E7-05
Description:
Standard memory/expansion memory read/write error (MFP PWB)
Causes:
Improper insertion of the memory. Garbled memory data. The memory capacity is not the specified level.
Remedy:
Check insertion of the memory. Use SIM60-1 to check the read/write operations of the memory. Replace the expansion memory. Replace the MFP PWB.
Code: E7-06
Description:
Image data decode error
Causes:
Compressed image data abnormality. HDD connection trouble when HDD is installed. Image data compression/transfer data garble. MFP PWB trouble.
Remedy:
If the job at an occurrence of an error is a FAX job, check the FAX PWB. Check connection of the MFPC PWB and the HDD. Replace the MFPC PWB.

Code: E7-08
Description:
MFP memory compatibility error (MFP PWB)
Causes:
A DIMM of different specifications is installed to the MFP memory slot. DIMM trouble.
Remedy:
Check the installed DIMM. Replace the DIMM.
Code: E7-09
Description:
Standard memory size/Expansion memory size error (MFP PWB)
Causes:
A DIMM other than below is installed to the default throttle. • 38-sheet machine/40-sheet machine System memory: 1GB Local memory: 512MB • 31-sheet machine System memory: 512MB Local memory: 512MB DIMM trouble. Insufficient memory size.
Remedy:
Replace the DIMM.
Code: E7-10
Description:
Shading error (Black correction)
Causes:
Abnormality in the CCD black scan level when the scanner lamp is turned OFF. Improper installation of the harness to the CCD unit/SCU PWB. CCD unit abnormality. SCU PWB abnormality.
Remedy:
Check connection of the harness to the CCD unit/ SCU PWB. Check the CCD unit. Check the SCU PWB.
Code: E7-11
Description:
Shading error (White correction)
Causes:
Abnormality in the CCD white reference plate scan level when the scanner lamp is turned ON. Improper installation of the harness to the CCD unit/SCU PWB. Dirt on the mirror, lens, and the reference white plate. Scanner lamp lighting trouble. CCD unit abnormality. SCU PWB abnormality.
Remedy:
Check connection of the harness to the CCD unit/ SCU PWB. Check connection of the harness to the scanner lamp unit. Clean the mirror, the lens, and the reference white plate. Check the CCD unit. Check the SCU PWB.
Code: E7-14
Description:
CCD-ASIC error
Causes:
SCU PWB trouble.
Remedy:
Check the SCU PWB. Replace the SCU PWB.
Code: E7-20
Description:
LSU laser detection error (K)
Causes:
Optical axis shift. Reduced laser power, lighting error, laser diode trouble. BD PWB trouble. Harness and connector trouble between the LD/BD PWB and the LSU cnt PWB.
Remedy:
Use SIM61-1 to check the operation of the LSU. Check the PWB and connection of the harness in the LSU. Replace the LSU.
Code: E7-21
Description:
LSU laser detection error (C)
Causes:
Reduced laser power, lighting error, laser diode trouble. Harness and connector trouble between the LD PWB and the LSU cnt PWB.
Remedy:
Use SIM61-1 to check the operation of the LSU. Check the PWB and connection of the harness in the LSU. Replace the LSU.cnt PWB.
Code: E7-22
Description:
LSU laser detection error (M)
Causes:
Reduced laser power, lighting error, laser diode trouble. Harness and connector trouble between the LD PWB and the LSU cnt PWB.
Remedy:
Use SIM61-1 to check the operation of the LSU. Check the PWB and connection of the harness in the LSU. Replace the LSU.

Code: E7-23
Description:
LSU laser detection error (Y)
Causes:
Reduced laser power, lighting error, laser diode trouble. Harness and connector trouble between the LD PWB and the LSU cnt PWB.
Remedy:
Use SIM61-1 to check the operation of the LSU. Check the PWB and connection of the harness in the LSU. Replace the LSU.
Code: E7-28
Description:
LSU-PCU connection error
Causes:
Communication error between the CPU in the PCU PWB and the control ASIC. Improper connection of the communication connector between the PCU PWB and the LSU cnt PWB (interface PWB). Harness trouble between the PCU PWB and the LSU cnt PWB (interface PWB) PCU PWB or LSU cnt PWB (interface PWB) trouble
Remedy:
Check connection of the connector and the harness between the PCU PWB and the LSU cnt PWB (interface PWB). Replace the LSU cnt PWB. Replace the PCU PWB.
Code: E7-29
Description:
LSU ASIC frequency error
Causes:
Oscillation abnormality of the external oscillator and the internal oscillating circuit used in the LSU ASIC. LSU ASIC abnormality on the LSU ASIC PWB.
Remedy:
Replace the LSU cnt PWB.
Code: E7-50
Description:
Engine connection trouble
Causes:
A PWB, or firmware, or LSU which is not supported by the machine specifications is detected in the PCU PWB. PCU PWB trouble. LSU trouble.
Remedy:
Check the kind and the version of the firmware. Check the LSU, and replace it if necessary. Check the PCU PWB, and replace it if necessary.
Code: E7-55
Description:
PWB information sum error (Engine detection)
Causes:
PCU EEPROM sum check error. PCU EEPROM trouble. PCU EEPROM contact trouble. Malfunction due to noises
Remedy:
Replace the PCU PWB. Replace the PCU EEPROM.
Code: E7-60
Description:
Combination error between the MFP PWB and other PWB, firmware
Causes:
A PWB or firmware which is not supported by the machine specifications is detected in the MFP PWB. MFP PWB trouble. The PWB/firmware which is not supported by the machine specifications is connected.
Remedy:
Check the kind and the version of the firmware. Check the MFP PWB, and replace it if necessary.
Code: E7-61
Description:
Combination error between the MFP PWB and the PCU PWB
Causes:
Combination error between the MFP PWB and the PCU PWB. MFP PWB trouble. PCU PWB trouble.
Remedy:
Check the combination between the MFP PWB and the PCU PWB. Replace the MFP PWB. Replace the PCU PWB.
Code: E7-65
Description:
MFP EEPROM sum check error
Causes:
MFP PWB EEPROM device breakdown. Contact trouble of the MFP EEPROM device. Malfunction due to noises.
Remedy:
Replace the MFP PWB. Replace the MFP PWB EEPROM.

Code: E7-80
Description:
MFP-SCU PWB communication error
Causes:
SCU PWB connector connection trouble. SCU PWB - MFP PWB connection trouble. SCU PWB mother board connection trouble. SCU PWB trouble. MFP PWB trouble. Replace the mother board.
Remedy:
Check connection of the SCU PWB, the MFP PWB, and the mother board. Check the earth line. Replace the SCU PWB. Replace the MFP PWB. Replace the mother board.
Code: E7-90
Description:
MFP-PCU PWB communication error
Causes:
PCU PWB connector connection trouble. PCU PWB - MFP PWB connection trouble. PCU PWB motherboard connection trouble. PCU PWB trouble. MFP PWB trouble. Replace the mother board.
Remedy:
Check connection of the PCU PWB, the MFP PWB, and the mother board. Check the earth line. Replace the PCU PWB. Replace the MFP PWB. Replace the mother board.
Code: EE-EC
Description:
Automatic toner density adjustment error (Sampling level 76 - 117/139 - 178)
Causes:
Toner density sensor trouble. Developing unit trouble. PCU PWB trouble.
Remedy:
Replace the toner density sensor. Replace the developing unit. Replace the PCU PWB.
Code: EE-EL
Description:
Automatic toner density adjustment error (Overtoner)
Causes:
Toner density sensor trouble. Charging voltage/ developing voltage trouble, toner density trouble, or developing unit trouble. PCU PWB trouble.
Remedy:
Replace the toner density sensor. Replace the developing unit. Replace the PCU PWB.
Code: EE-EU
Description:
Automatic toner density adjustment error (Undertoner)
Causes:
Toner density sensor trouble. Charging voltage/ developing voltage trouble, toner density trouble, or developing unit trouble. PCU PWB trouble.
Remedy:
Replace the toner density sensor. Replace the developing unit. Replace the PCU PWB.
Code: F1-00
Description:
Finisher - PCU PWB communication error
Causes:
Connection trouble of the connector and the harness between the finisher and the PCU PWB. Finisher control PWB trouble. PCU PWB trouble. Strong external noises.
Remedy:
Check the connector and the harness between the finisher and the PCU PWB. Replace the finisher control PWB. Replace the PCU PWB.
Code: F1-03
Description:
Finisher paper exit roller lifting operation trouble
Causes:
Finisher paper exit roller lift motor trouble. Harness and connector connection trouble. Home position sensor trouble. Finisher control PWB trouble.
Remedy:
Use SIM3-3 to check the operation of the paper exit roller lift motor. Replace the paper exit roller lift motor. Check connection of the connector and the harness. Replace the home position sensor. Replace the finisher control PWB.
Code: F1-10
Description:
Staple operation trouble
Causes:
Staple motor trouble. Finisher control PWB trouble. Home position sensor trouble.
Remedy:
Use SIM3-3 to check the operation of the staple motor. Replace the staple motor. Check connection of the connector and the harness. Replace the home position sensor. Replace the finisher control PWB.

Code: F1-15
Description:
Finisher paper exit tray lift operation trouble
Causes:
Paper exit tray lift motor trouble. Finisher control PWB trouble.
Remedy:
Use SIM3-3 to check the operation of the paper exit tray lift motor. Replace the finisher control PWB. Replace the paper exit tray lift motor.
Code: F1-19
Description:
Finisher alignment operation trouble F
Causes:
Finisher paper alignment motor lock. Motor speed abnormality. Overcurrent to the motor. Finisher control PWB trouble.
Remedy:
Use SIM3-3 to check the operation of the paper alignment motor F. Replace the finisher control PWB. Replace the paper alignment motor F.
Code: F1-20
Description:
Finisher alignment operation trouble R
Causes:
Finisher paper alignment motor lock. Motor speed abnormality. Overcurrent to the motor. Finisher control PWB trouble.
Remedy:
Use SIM3-3 to check the operation of the paper alignment motor R. Replace the finisher control PWB. Replace the paper alignment motor R.
Code: F1-21
Description:
Finisher fan trouble
Causes:
Finisher fan motor trouble. Finisher control PWB trouble. Harness and connector connection trouble.
Remedy:
Use SIM3-3 to check the operation of the fan motor. Check connection between the finisher control PWB and the fan. Replace the fan. Replace the finisher control PWB.
Code: F1-29
Description:
Finisher PWB fan trouble
Causes:
Finisher PWB fan lock. Finisher control PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM 3-3 to check the operation of the control PWB cooling fan (FBCF). Replace the finisher PWB fan. Replace the finisher control PWB. Connection trouble of the connector and the harness.
Code: F1-37
Description:
Finisher data backup RAM error
Causes:
Finisher control PWB trouble. Malfunction due to noises
Remedy:
Replace the finisher control PWB. Readjust the finisher. (Use SIM3-10,Finisher control PWB DIP SW adjustment.)
Code: F1-50
Description:
Main unit - Finisher combination error
Causes:
The finisher which is not supported by the main unit model is installed. Finisher control PWB trouble.
Remedy:
Install a proper finisher. Replace the finisher control PWB.
Code: F2-11
Description:
Developing unit initial detection (K)
Causes:
The initial detection fuse is not blown off though it is conducted for the specified time. (K) Developing unit trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM6-51 to check the operation of the [DVCRU K] fuse blowing circuit. Use SIM30-1 to check the [DVCRU K] initial detection input signal. Replace the developing unit. Replace the PCU PWB. Check connection of the connector and the harness.

Code: F2-12
Description:
Developing unit initial detection (C)
Causes:
The initial detection fuse is not blown off though it is conducted for the specified time. (C) Developing unit trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM6-51 to check the operations of the [DVCRU C] fuse blowing circuit. Use SIM30-1 to check the [DVCRU C] initial detection input signal. Replace the developing unit. Replace the PCU PWB. Check connection of the connector and the harness.
Code: F2-13
Description:
Developing unit initial detection (M)
Causes:
The initial detection fuse is not blown off though it is conducted for the specified time. (M) Developing unit trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM6-51 to check the operations of the [DVCRU M] fuse blowing circuit. Use SIM30-1 to check the [DVCRU M] initial detection input signal. Replace the developing unit. Replace the PCU PWB. Check connection of the connector and the harness.
Code: F2-14
Description:
Developing unit initial detection (Y)
Causes:
The initial detection fuse is not blown off though it is conducted for the specified time. (Y) Developing unit trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM6-51 to check the operations of the [DVCRU Y] fuse blowing circuit. Use SIM30-1 to check the [DVCRU Y] initial detection input signal. Replace the developing unit. Replace the PCU PWB. Check connection of the connector and the harness.
Code: F2-15
Description:
Drum unit initial detection trouble (K drum)
Causes:
When the newly installed drum is driven for the specified time after installation, the new state is not canceled. (K) Detection switch [DRCRU-K] trouble Process cartridge trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM30-1 to check the operation of the [DRCRU-K] switch. Replace the process (drum) cartridge. Replace the PCU PWB. Check connection of the connector and the harness.
Code: F2-16
Description:
Drum unit initial detection trouble (C drum)
Causes:
When the newly installed drum is driven for the specified time after installation, the new state is not canceled. (C) Detection switch [DRCRU-C] trouble Process cartridge trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM30-1 to check the operation of the [DRCRU-C] switch. Replace the process (drum) cartridge. Replace the PCU PWB. Check connection of the connector and the harness.
Code: F2-17
Description:
Drum unit initial detection trouble (M drum)
Causes:
When the newly installed drum is driven for the specified time after installation, the new state is not canceled. (M) Detection switch [DRCRU-M] trouble Process cartridge trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM30-1 to check the operation of the [DRCRU-M] switch. Replace the process (drum) cartridge. Replace the PCU PWB. Check connection of the connector and the harness.
Code: F2-18
Description:
Drum unit initial detection trouble (Y drum)
Causes:
When the newly installed drum is driven for the specified time after installation, the new state is not canceled. (Y) Detection switch [DRCRU-Y] trouble Process cartridge trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM30-1 to check the operation of the [DRCRU-Y] switch. Replace the process (drum) cartridge. Replace the PCU PWB. Check connection of the connector and the harness.
Code: F2-19
Description:
Primary transfer unit initial detection trouble
Causes:
When the newly installed primary transfer unit is driven for the specified time after installation, the new state is not canceled. 1TUD K sensor trouble Primary transfer initial operation clutch mechanism trouble Primary transfer unit initial detection level trouble PCU PWB trouble. Connection trouble of the connector and the harness. Primary transfer belt unit trouble.
Remedy:
Use SIM30-1 to check the operation of the 1TUD-K sensor. Use SIM6-3 to check the switching operation of the primary transfer unit. Check to confirm that the initial detection level is inclined. Replace the PCU PWB. Check connection of the connector and the harness. Replace the primary transfer unit.

Code: F2-21
Description:
Secondary transfer unit initial detection trouble
Causes:
When the newly installed secondary transfer unit is driven for the specified time after installation, the new state is not canceled. PCU PWB trouble. Connection trouble of the connector and the harness. Secondary transfer UN initial detection mechanism trouble Initial detection electrode trouble Secondary transfer unit trouble.
Remedy:
Check conduction of the initial detection electrode plate and the initial detection GND electrode plate. Replace the PCU PWB. Check connection of the connector and the harness. Replace the secondary transfer unit.
Code: F2-22
Description:
Discharge lamp trouble (K)
Causes:
Contact trouble between the discharge lamp PWB (K) and the PCU PWB. Discharge lamp PWB (K) trouble. PCU PWB trouble.
Remedy:
Replace the discharge lamp PWB (K). Check the harness and the connector. Replace the PCU PWB.
Code: F2-23
Description:
Discharge lamp trouble (C)
Causes:
Contact trouble between the discharge lamp PWB (C) and the PCU PWB. Discharge lamp PWB (C) trouble. PCU PWB trouble.
Remedy:
Replace the discharge lamp PWB (C). Check the harness and the connector. Replace the PCU PWB.
Code: F2-24
Description:
Discharge lamp trouble (M)
Causes:
Contact trouble between the discharge lamp PWB (M) and the PCU PWB. Discharge lamp PWB (M) trouble. PCU PWB trouble.
Remedy:
Replace the discharge lamp PWB (M). Check the harness and the connector. Replace the PCU PWB.
Code: F2-25
Description:
Discharge lamp trouble (Y)
Causes:
Contact trouble between the discharge lamp PWB (Y) and the PCU PWB. Discharge lamp PWB (Y) trouble. PCU PWB trouble.
Remedy:
Replace the discharge lamp PWB (Y). Check the harness and the connector. Replace the PCU PWB.
Code: F2-26
Description:
Auto toner density control level setting trouble (K)
Causes:
The toner density sample level is not in the specified range when the automatic toner density control level is set. (K) Toner density sensor trouble. Developing unit trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
When the power is turned OFF/ON, the automatic developer adjustment is executed again. Replace the developer cartridge. Replace the PCU PWB. Check connection of the connector and the harness.
Code: F2-27
Description:
Auto toner density control level setting trouble (C)
Causes:
The toner density sample level is not in the specified range when the automatic toner density control level is set. (C) Toner density sensor trouble. Developing unit trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
When the power is turned OFF/ON, the automatic developer adjustment is executed again. Replace the developer cartridge. Replace the PCU PWB. Check connection of the connector and the harness.
Code: F2-28
Description:
Auto toner density control level setting trouble (M)
Causes:
The toner density sample level is not in the specified range when the automatic toner density control level is set. (M) Toner density sensor trouble. Developing unit trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
When the power is turned OFF/ON, the automatic developer adjustment is executed again. Replace the developer cartridge. Replace the PCU PWB. Check connection of the connector and the harness.

Code: F2-29
Description:
Auto toner density control level setting trouble (Y)
Causes:
The toner density sample level is not in the specified range when the automatic toner density control level is set. (Y) Toner density sensor trouble. Developing unit trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
When the power is turned OFF/ON, the automatic developer adjustment is executed again. Replace the developer cartridge. Replace the PCU PWB. Check connection of the connector and the harness.
Code: F2-39
Description:
Process thermister trouble
Causes:
Process thermister trouble. Process thermister harness connection trouble. PCU PWB trouble
Remedy:
Replace the process thermister. Check connection of the harness and the connector. Replace the PCU PWB.
Code: F2-40
Description:
Toner density sensor trouble (BLACK)
Causes:
Toner density sensor output abnormality (Sample level 25 or less, or 231 or above) Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble
Remedy:
Replace the toner density sensor. Harness and connector connection trouble. Replace the developing unit. Replace the PCU PWB.
Code: F2-41
Description:
Toner density sensor trouble (CYAN)
Causes:
Toner density sensor output abnormality (Sample level 25 or less, or 231 or above) Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble
Remedy:
Replace the toner density sensor. Harness and connector connection trouble. Replace the developing unit. Replace the PCU PWB.
Code: F2-42
Description:
Toner density sensor trouble (MAGENTA)
Causes:
Toner density sensor output abnormality (Sample level 25 or less, or 231 or above) Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble
Remedy:
Replace the toner density sensor. Harness and connector connection trouble. Replace the developing unit. Replace the PCU PWB.
Code: F2-43
Description:
Toner density sensor trouble (YELLOW)
Causes:
Toner density sensor output abnormality (Sample level 25 or less, or 231 or above). Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble.
Remedy:
Replace the toner density sensor. Harness and connector connection trouble. Replace the developing unit. Replace the PCU PWB.
Code: F2-45
Description:
K image density sensor trouble
Causes:
K image density sensor sensitivity adjustment trouble. K image density sensor trouble. Harness and connector connection trouble. K image density sensor dirt. Calibration plate dirt. Calibration plate solenoid trouble. PCU PWB trouble.
Remedy:
Replace the K image density sensor. Check connection of the connectors and the harness. Clean the K image density sensor. Replace the calibration plate. Replace the calibration plate solenoid. Replace the PCU PWB. Use SIM44-2 to adjust the process control sensor sensitivity.
Code: F2-49
Description:
LSU thermister trouble
Causes:
The LSU detection temperature is outside of -28..C - 78..C. LSU thermister trouble. Harness and connector connection trouble. PCU PWB trouble LSU control PWB trouble
Remedy:
Replace the LSU thermister. Check connection of the connectors and the harness. Replace the PCU PWB. Replace the LSU control PWB. Replace the LSU.
Code: F2-50
Description:
K drum phase sensor trouble
Causes:
Drum phase sensor trouble. Harness and connector connection trouble. Drum drive section trouble. PCU PWB trouble
Remedy:
Use SIM30-1 to check the operation of "DhpD_K.". Replace the drum phase sensor. Check connection of the connectors and the harness. Repair the drum drive section. Replace the PCU PWB.
Code: F2-51
Description:
CL drum phase sensor trouble
Causes:
Drum phase sensor trouble. (DhpCL) Harness and connector connection trouble. Drum drive section trouble. PCU PWB trouble.
Remedy:
Use SIM30-1 to check the operation of "DhpD_CL". Replace the drum phase sensor. Check connection of the connectors and the harness. Repair the drum drive section. Replace the PCU PWB.
Code: F2-58
Description:
Process humidity sensor trouble
Causes:
Process humidity sensor trouble. Harness and connector connection trouble. PCU PWB trouble.
Remedy:
Replace the process humidity sensor. Check connection of the connectors and the harness. Replace the PCU PWB.
Code: F2-64
Description:
Toner supply operation trouble (BK)
Causes:
Toner motor trouble. Toner density sensor trouble. Connector/harness trouble. PCU PWB trouble. Toner cartridge trouble. Developing unit trouble.
Remedy:
Replace the toner motor. Replace the toner density sensor. Connector/harness trouble. Replace the PCU PWB. Replace the toner cartridge. Replace the developing unit.
Code: F2-65
Description:
Toner supply operation trouble (C)
Causes:
Toner motor trouble. Toner density sensor trouble. Connector/harness trouble. PCU PWB trouble Toner cartridge trouble. Developing unit trouble.
Remedy:
Replace the toner motor. Replace the toner density sensor. Connector/harness trouble. Replace the PCU PWB. Replace the toner cartridge. Replace the developing unit.
Code: F2-66
Description:
Toner supply operation trouble (M)
Causes:
Toner motor trouble. Toner density sensor trouble. Connector/harness trouble. PCU PWB trouble Toner cartridge trouble. Developing unit trouble.
Remedy:
Replace the toner motor. Replace the toner density sensor. Connector/harness trouble. Replace the PCU PWB. Replace the toner cartridge. Replace the developing unit.
Code: F2-67
Description:
Toner supply operation trouble (Y)
Causes:
Toner motor trouble. Toner density sensor trouble. Connector/harness trouble. PCU PWB trouble Toner cartridge trouble. Developing unit trouble.
Remedy:
Replace the toner motor. Replace the toner density sensor. Connector/harness trouble. Replace the PCU PWB. Replace the toner cartridge. Replace the developing unit.
Code: F2-70
Description:
Improper toner cartridge detection (BLACK)
Causes:
An improper toner cartridge is inserted. (The main unit detects a toner cartridge of a different specification.) Toner cartridge trouble. PCU PWB trouble
Remedy:
Replace the toner cartridge. Replace the PCU PWB.