Printer repair Kyocera ECOSYS M8124cidn

No Response When Powering On

Description: Potential causes of power failure in Kyocera ECOSYS M8124cidn MFP:

• Failed power supply board (capacitors, diodes, fuses)
• Damaged power cable or plug
• Sticky/oxidized power button contacts
• Short circuit in the formatter board
• High Voltage Unit (HVU) malfunction
• Internal wiring break (e.g., after cleaning)
• Power management firmware failure
• Burnt thermistor in the fuser unit
• Burnt heating element in the fuser unit
• Defective power connector on the main board
• DC controller damage
• Main board (formatter) failure

Dirty Prints, Background Stains, or Artifacts

Description: Causes of print defects in Kyocera ECOSYS M8124cidn MFP:

• Worn drum unit (scratches, abrasions)
• Contaminated developer roller
• Worn cleaning blade
• Defective doctor blade (uneven toner distribution)
• Damaged teflon roller (cracks, coating peeling, surface grooves)
• Dust on laser unit lenses/mirrors
• Toner leakage (cartridge seal failure)
• Worn transfer roller
• Damaged transfer belt
• Full waste toner container
• Dirty main charge roller (MC)
• Incorrect print density calibration (requires service menu adjustment)
• Deformed fuser pressure roller
• Use of low-quality toner
• Degraded developer properties
• Dirty scanner glass (smudges/black lines during scanning/copying)
• Contaminated or failed scanner CCD
• Malfunctioning waste toner augers
• Electrical component issues (incorrect voltage supply)

Frequent Paper Jams or Creasing

Description: Common causes of paper jams in Kyocera ECOSYS M8124cidn MFP:

• Worn feed rollers
• Paper dust buildup on rollers
• Misaligned paper sensors
• Bent paper tray guides
• Fuser unit overheating (paper sticking)
• Dull separation claw
• Loose springs in feed mechanism
• Foreign objects in paper path
• Faulty paper pickup solenoids
• Worn electromagnetic clutches
• Worn gearbox gears
• Incorrect timing settings (requires service menu adjustment)
• Worn fuser roller bearings
• Use of low-quality paper
• Incorrect paper type selection

C0030: FAX PWB system error

Problem description: The FAX processing cannot be continued due to the FAX firmware error

C0070: FAX PWB incompatible detection error

Problem description: Abnormal detection of FAX control PWB incompatibility in the initial communication with the FAX control PWB, any normal communication command is not transmitted

C0100: Backup memory device error

Problem description: An abnormal status is output from the flash memory

C0120: MAC address data error

Problem description: The MAC address data is incorrect.

C0130: Backup memory reading/writing error

Problem description: The reading or writing into the flash memory is unavailable

C0140: Backup memory data error

Problem description: The flash memory data read at the initial start-up is faulty

C0150: Engine EEPROM reading / writing error

Problem description:
1. Continuous five times detection of no response from the device for 5ms or more on reading / writing
2. Data read twice do not match continuous 8 times
3. Writing data and reading data do not match continuous 8 times

C0160: EEPROM data error

Problem description: The data read from the EEPROM is judged as abnormal

C0170: Charger count error

Problem description:
1. Errors are detected in both backup memory of the engine PWB charge counter and main PWB charge counter.
2. Main PWB counter data and engine PWB counter date are faulty

C0180: Machine serial number mismatch

Problem description: The machine serial Nos. in the main PWB and the EEPROM on the engine PWB mismatch when turning the power on

C0190: Backup memory device error (Engine)

Problem description: Data from the main unit IC cannot be read out at power-up

C0500: Drive lock detected by the engine firmware

Problem description: During the engine steady state control, the main motor drive continued 60 minutes or more (except during the maintenance mode)

C0510: Main charger control error

Problem description: The main charger bias turns on while the drum stops

C0520: Developer control error

Problem description: The developer bias off is detected during the main charge bias off

C0530: Backup task error

Problem description: No operation 30s or more when monitoring the backup task operation

C0800: Image processing error

Problem description: The print sequence jam (J010x) is detected 2 times continuously

C0830: FAX PWB flash program area checksum error

Problem description: The program stored in the flash memory on the FAX PWB is broken so it cannot perform

C0840: RTC error

Problem description:
• Not communicated with RTC correctly
• RTC data is inconsistent with empty battery

C0870: PC FAX Image data transmission error

Problem description: Data was not properly transmitted even if the specified times of retry were made when the large volume data is transmitted between the FAX PWB and the main PWB

C0920: FAX file system error

Problem description: The backup data could not be stored since the file system of the flash memory is faulty

C0980: 24V power interruption detection

Problem description:
• 24V power shutoff signal is detected 1s continuously.
• Other service call error occurs after 24V power shutoff signal is lowered, and then 24V power is recovered

C1010: Lift motor 1 error

Problem description:
• Cassette 1 lift motor over-current is detected 5 times continuously.
• Lift sensor on is not detected 5 times continuously when passing 15s after cassette 1 is loaded

C1020: PF lift motor 1 error

Object: 500-sheet paper feeder, 500-sheet x2 paper feeder

Problem description: The PF lift sensor 1 on is not detected 5 times continuously when passing 15s after loading cassette 2

C1030: PF lift motor 2 error

Object: 500-sheet x2 paper feeder

Problem description: The PF lift sensor 2 on is not detected 5 times continuously when passing 15s after loading cassette 3

C1800: Paper Feeder communication error

Object: 500-sheet paper feeder, 500-sheet x2 paper feeder

Problem description: The communication error was detected 10 times continuously

C1900: Paper Feeder EEPROM error

Object: 500-sheet paper feeder, 500-sheet x2 paper feeder
For internal count

Problem description: The writing data and the reading data mismatch 4 times continuously when writing

C2101: Developer motor K steady-state error

Problem description: Developer motor K steady state off is detected for 1s continuously after becoming the steady state

C2102: Developer motor CMY steady-state error

Problem description: Developer motor CMY steady state off is detected 1s continuously after becoming the steady state

C2201: Drum motor K steady-state error

Problem description: Drum motor K steady state off is detected for 1s continuously after becoming the steady state

C2202: Drum motor CMY steady-state error

Problem description: Drum motor CMY steady state off is detected 1s continuously after becoming the steady state

C2300: Fuser motor steady state error

Problem description: The fuser motor steady state off is detected 1s continuously after becoming steady state

C2310: Fuser motor start-up error

Problem description: The fuser motor is not in the steady state within 1.5s after start-up

C2550: Conveying motor steady-state error

Problem description: The conveying motor steady state off is detected 1s continuously after becoming the steady state

C2550: Conveying motor startup error

Problem description: The conveying motor is not in the steady state within 2s after start-up

C2600: PF motor error

Object: 500-sheet paper feeder, 500-sheet x2 paper feeder

Problem description: An error signal was detected 2s continuously during the PF motor drive

C2700: Belt release motor error

Problem description: The error signal is detected for 3s continuously after the belt release motor starts up

C3100: Carriage error

Object: CCD model

Problem description: The home position sensor is off and does not turn on when passing the specified time at initialization and it does not turn on at retry once

C3100: Carriage error

Object: CIS model

Problem description: The home position sensor is off and does not turn on when passing the specified time at initialization and it does not turn on at retry once

C3200: LED error

Object: CCD model

Problem description: The white reference data retrieved by lighting the lamp at the initial operation is at the specified value or less

C3200: CIS error

Object: CIS model

Problem description:
• The white reference data retrieved by lighting the lamp at the initial operation is lower than the specified value.
• The white reference data retrieved by lighting the lamp at the auto table adjustment is lower than the specified value.

C3300: CCD AGC error

Object: CCD model
For internal count

Problem description: The white reference data after adjustment is not within the target range

C3300: CIS AGC error

Object: CIS model
For internal count

Problem description: The white reference data after adjustment is not within the target range

C3500: Scanner AISC communication error

Problem description: Readback values are different 4 times continuously during communication between the scanner and ASIC

C3600: Scanner sequence error

Problem description:
• Mail box buffer overflow is detected.
• Software sequence error is detected.

C4001: Polygon motor K startup error

Problem description: Polygon motor K is not in the steady state within 10s after becoming steady state

C4002: Polygon motor C startup error

Problem description: Polygon motor C is not in the steady state within 10s after becoming steady state

C4003: Polygon motor M startup error

Problem description: Polygon motor M is not in the steady state within 10s after becoming steady state

C4004: Polygon motor Y startup error

Problem description: Polygon motor Y is not in the steady state within 10s after becoming steady state

C4011: Polygon motor K steady-state error

Problem description: Polygon motor K is off from the steady state for 1s continuously after becoming the steady state

C4012: Polygon motor C steady-state error

Problem description: Polygon motor C is off from the steady state for 1s continuously after becoming the steady state

C4013: Polygon motor M steady-state error

Problem description: Polygon motor M is off from the steady state for 1s continuously after becoming the steady state

C4014: Polygon motor Y steady-state error

Problem description: Polygon motor Y is off from the steady state for 1s continuously after becoming the steady state

C4101: BD initialization error (Black)

Problem description: BD is not detected within 1s after polygon motor K is in the steady state

C4102: BD initialization error (Cyan)

Problem description: BD is not detected within 1s after polygon motor C is in the steady state

C4103: BD initialization error (Magenta)

Problem description: BD is not detected within 1s after polygon motor M is in the steady state

C4104: BD initialization error (Yellow)

Problem description: BD is not detected within 1s after polygon motor Y is in the steady state

C4600: LSU cleaning motor error

Problem description: The error signal is detected for 2s continuously after the motor starts up

C4700: Video ASIC device error

Problem description: Writing data and reading data does not match 8 consecutive times

C6000: IH heating error

Problem description:
1. The fuser center thermistor does not detect 100°C / 212°F or more within 25s after warm-up is started
2. During the warm-up, the fuser center thermistor does not detect the ready temperature within 20s after it detects 100°C / 212°F

C6020: Fuser center thermistor high temperature error

Problem description: The fuser center thermistor detected 230°C / 446°F or more for 1s

C6030: Broken fuser center thermistor

Problem description:
1. During warm-up, the fuser center thermistor detects 41°C / 105°F for 1s continuously while the fuser edge thermistor detects 100°C / 212°F or more
2. The fuser center thermistor does not detect 25°C / 77°F within 12s after start-up

C6050: Fuser center thermistor low temperature error

Problem description: The fuser center thermistor detects less than 80°C / 176°F for 1s during printing

C6120: Fuser press roller thermistor high temperature error

Problem description: The fuser press roller thermistor detected 210°C / 410°F or more for 1s

C6130: Broken fuser press roller thermistor

Problem description:
1. During warm-up, the fuser press roller thermistor detects less than 35°C / 95°F for 60s continuously
2. After finishing warm-up, the fuser press roller thermistor detects less than 35°C / 95°F for 30s continuously

C6200: IH heating error 2

Problem description: After warm-up is started, the fuser edge thermistor does not detect 80°C / 176°F within 25s. Or, during the warm-up, specified temperature (Ready display temperature) is not detected even 420s passed after center thermistor reached 100°C / 212°F

C6220: Fuser edge thermistor high temperature error

Problem description: The fuser edge thermistor detects 245°C / 473°F or more for 1s

C6230: Fuser edge thermistor high temperature error

Problem description:
1. During warm-up, the fuser edge thermistor detects less than 41°C / 105°F for 1s continuously while the fuser center thermistor detects 100°C / 212°F or more
2. The fuser edge thermistor does not detect 25°C / 77°F within 12s after start-up

C6250: Fuser edge thermistor low temperature error

Problem description: The fuser edge thermistor detected less than 80°C / 176°F for 1s during printing

C6320: Fuser middle thermistor high temperature error

Problem description: The fuser middle thermistor detected 245°C / 473°F or more for 1s

C6330: Broken fuser middle thermistor

Problem description: The fuser middle thermistor detects less than 41 °C / 105°F for 1s continuously while the fuser center thermistor or the fuser edge thermistor detects 100°C / 212°F or more during warm-up

C6600: Fuser heat belt rotation error

Problem description: The belt rotation pulse is not input for 1.8s continuously

C6610: Fuser pressure release sensor error

Problem description:
1. The fuser pressure release sensor does not turn off even after 10s passed from instructing to reduce the fuser pressure
2. The fuser pressure release sensor does not turn on even after 10s passed from instructing to increase the fuser pressure
3. The lock signal of the fuser pressure release motor became error for 300ms

C6740: IH PWB high temperature error (IGBT2)

Problem description: The IGBT temperature acquired from the power microprocessor detects 115°C / 239°F or more for 1s continuously

C6760: Fuser IH input excessive electric current error

Problem description: The input current obtained from the power microcomputer was 20A (100/120V) or 10A (200V) or more continued for 200ms

C6770: IH low power error

Problem description: After fuser heating starts,the electric power detection on the IH PWB detected a set electric power value of 30% or less for a predetermined time

C6940: IH fan motor error

Problem description: Lock-up is detected for 20s continuously when the fan motor drives

C6950: IH-CPU communication error

Problem description:
1. Communication between the IH PWB and the engine PWB is not established in the initial communication. (150ms interval x 10 times retries and then 3 times retries of the relay remote)
2. After the initial communication is established, communication between the IH PWB and the engine PWB is not established at the operation except for printing. (If communication fails for 500ms, 3 times retries or the relay remote are performed)
3. After the initial communication is established, communication between the IH PWB and the engine PWB is not established durint printing. (If communication fails for 500ms, 150ms interval x 10 times retries are performed)

C6990: Fuser power source destination error

Problem description: The engine backup data does not match the IH PWB power supply destination. (0, 5 or more)

C7101: T/C sensor K error

Problem description: The sensor input voltage is less than 0.3V, or 3.2V or more. Also, that state continues for 5s or more

C7102: T/C sensor C error

Problem description: The sensor input voltage is less than 0.3V, or 3.2V or more. Also, that state continues for 5s or more

C7103: T/C sensor M error

Problem description: The sensor input voltage is less than 0.3V, or 3.2V or more. Also, that state continues for 5s or more

C7104: T/C sensor Y error

Problem description: The sensor input voltage is less than 0.3V, or 3.2V or more. Also, that state continues for 5s or more

C7200: Inner thermistor broken (developer)

Problem description: The sensor input data is 0.3V or less

C7210: Inner thermistor short-circuited (developer)

Problem description: The sensor input data is 3.0V or more

C7221: Broken LSU thermistor K

Problem description: The sensor input data is 0.3V or less

C7224: Broken LSU thermistor Y

Problem description: The sensor input data is 0.3V or less

C7231: LSU thermistor K short-circuited

Problem description: The sensor input data is 3.0V or more

C7234: LSU thermistor Y short-circuited

Problem description: The sensor input data is 3.0V or more

C7240: Broken container thermistor

Problem description: The sensor input data is 0.3V or less

C7250: Container thermistor short-circuited

Problem description: The sensor input data is 3.0V or more

C7601: Front ID sensor error

Problem description:
• The sensor output value of the dark potential is 0.15V or less, or 0.80V or more
• Bright potential is lower than the dark potential, or the gap is 0.5V or less

C7602: Rear ID sensor error

Problem description:
• The sensor output value of the dark potential is 0.15V or less, or 0.80V or more.
• Bright potential is lower than the dark potential, or the gap is 0.5V or less

C7611: ID sensor density error K

Problem description: The density of the BK-patch on the primary transfer belt is faulty at the Calibration or Color Adjustment

C7612: ID sensor density error C

Problem description: The density of the C-patch on the primary transfer belt is faulty at the Calibration or Color Adjustment

C7613: ID sensor density error M

Problem description: The density of the M-patch on the primary transfer belt is faulty at the Calibration or Color Adjustment

C7614: ID sensor density error Y

Problem description: The density of the Y-patch on the primary transfer belt is faulty at the Calibration or Color Adjustment

C7620: ID sensor timing error

Problem description: The color registration fails

C7800: Outer thermistor broken

Problem description: The sensor input data is 0.3V or less

C7810: Outer thermistor short-circuited

Problem description: The sensor input data is 0.3V or less

C8030: DF tray upper limit detection error

Object: 500-sheet document finisher

Problem description: The DF tray upper limit sensor on is detected when the DF tray motor is in ascending operation

C8040: DF belt error

Object: 500-sheet document finisher

Problem description: The DF belt sensor on or off cannot be detected when passing the specified time after the DF belt solenoid turns on

C8140: Dr tray motor error

Object: 500-sheet document finisher

Problem description: During the DF tray motor drive, the DF tray lower limit sensor, paper level sensor 1 and 2 on is not detected within 10s

C8210: DF staple error

Object: 500-sheet document finisher

Problem description: JAM7013 and 7023 was detected twice

C8320: DF adjuster motor 2 error

Object: 500-sheet document finisher

Problem description: The DF adjustor sensor 2 on or off cannot be detected when passing the specified time after the DF adjustor motor 2 turns on

C8330: DF adjuster motor 1 error

Object: 500-sheet document finisher

Problem description: The DF adjustor sensor 1 on or off cannot be detected when passing the specified time after the DF adjustor motor 1 turns on

C8350: DF roller motor error

Object: 500-sheet document finisher

Problem description: The DF roller sensor on or off cannot be detected when passing the specified time after the DF roller motor turns on

C8360: DF slide motor error

Object: 500-sheet document finisher

Problem description: The DF slide sensor on or off cannot be detected when passing the specified time after the DF slide motor turns on

C8460: EEPROM error

Object: 500-sheet document finisher

Problem description: EEPROM read/write is not available

C8800: Document finisher communication error

Object: 500-sheet document finisher

Problem description: The communication error was detected 10 times continuously

C8830: Relay conveying unit communication error

Object: 500-sheet document finisher + relay conveying unit

Problem description: The communication error was detected 10 times continuously

C8990: Finisher setup error

Object: 500-sheet document finisher + relay conveying unit

Problem description:
1. Communication error occurs with either the finisher or relay conveying unit.
2. Communication error occurs while installation of the relay conveying unit is detected

C9000: DP communication error

Object: Document processor

Problem description: The communication error was detected 10 times continuously

C9060: DP EEPROM error

Object: Document processor

Problem description: The writing data and the reading data into the EEPROM mismatch

C9180: DP feed-shift motor error

Object: Document processor

Problem description:
1. The DP feed-shift motor home position cannot be detected even driving it for one round.
2. The DP feed-shift motor home position cannot be detected even after retrying the detection for 3 times