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Kyocera FS-2020D, 3920DN, 4020DN
0100 Backup memory device error Defective flash memory. Replace main PWB
    Defective main PWB. Replace main PWB
0110 Backup memory data error Defective flash memory. Replace main PWB
    Defective main PWB. Replace main PWB
0120 MAC address data error Defective flash memory. Replace the engine PWB
    Defective engine PWB. Replace the engine PWB
0150 Engine PWB EEPROM error Detecting engine PWB EEPROM communication error. Improper installation engine PWB EEPROM. Check the engine PWB EEPROM installation, Remedy.
    Defective engine PWB. Replace the engine PWB
0170 Billing counting error Defective main PWB. Replace main PWB
0420 Paper feeder communication error Communication error between engine PWB and optional paper feeder. Improper installation paper feeder. Follow installation instruction carefully again.
  Defective harness between connect-L PWB (YC2) and paper feeder interface connector, or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
    Defective harness between connect-L PWB (YC6) and engine PWB (YC504), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
    Defective engine PWB. Replace the engine PWB
    Defective paper feeder. Replace the paper feeder.
1010 Lift motor lock error *40/42 and 45/47 ppm printers (EUR/ USA model) only A motor over-current signal is detected continuously for 5 seconds since the lift motor is activated. Defective bottom plate elevation mechanism in the paper cassette. Check to see if the bottom plate can move smoothly and repair it if any problem is found.
  Defective lift motor drive transmission system. Check if the gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
    Defective lift motor. Replace the lift motor.
    Defective engine PWB. Replace the engine PWB
1140 Lift motor ascent error *40/42 and 45/47 ppm printers (EUR/ USA model) only Defective bulk paper feeders tray top position sensor. Replace the bulk paper feeders tray top position sensor.
  Optional bulk paper feeders tray top position sensor does not turn on. Lift motor lock error occurred 3 times. Defective harness between bulk paper feeders tray top position sensor and main PWB (YC6), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
    Defective bulk paper feeders main PWB. Replace the bulk paper feeders main PWB. (Refer to bulk paper feeders service manual)
1150 Lift motor descent error *40/42 and 45/47 ppm printers (EUR/ USA model) only Optional bulk paper feeders tray bottom position sensor does not turn on. Lift motor lock error occurred 3 times. Defective bulk paper feeders tray bottom position sensor. Replace the bulk paper feeders tray bottom position sensor.
  Defective harness between bulk paper feeders tray bottom position sensor and main PWB (YC8), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness. (Refer to bulk paper feeders service manual)
    Defective bulk paper feeders main PWB. Replace the bulk paper feeders main PWB. (Refer to bulk paper feeders service manual)
2000 Main motor error MMOTRDYN signal does not go low within 2 s after MMOTONN signal goes low. Defective harness between main motor and engine PWB (YC501), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
    Defective main motor drive transmission system. Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
    Defective main motor. Replace the main motor.
    Defective engine PWB. Replace the engine PWB
2200 Drum motor error DMOTRDYN signal does not go low within 2 s after DMOTONN signal goes low. Defective harness between drum motor and engine PWB (YC11), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
    Defective drum motor drive transmission system. Check if the gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.
    Defective drum motor. Replace the drum motor.
    Defective engine PWB. Replace the engine PWB
4000 Polygon motor (laser scanner unit) error POLRDYN signal does not go low within 10 s after POLONN signal goes low. Defective harness between polygon motor and main PWB (YC11), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
    Defective harness between main PWB (YC12) and engine PWB (YC12), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
    Defective laser scanner unit. Replace the laser scanner unit
    Defective engine PWB. Replace the engine PWB
    Defective main PWB. Replace the main PWB
4200 Laser output (pin photo sensor) error The pin photo signal (PDN) is not output within a specified time after the polygon motor ready signal (POLRDYN) becomes ready (L level). Defective harness between PD PWB (YC1) and main PWB (YC16), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
    Defective APC PWB. Replace the laser scanner unit
    Defective PD PWB. Replace the laser scanner unit
    Defective main PWB. Replace the main PWB
5100 Short-circuited main charger output Five pages have been printed with the main charger output short-circuited. Drum unit installed incorrectly. Verify harness is not pinched in the drum unit.
  Engine PWB installed incorrectly. Verify harness is not pinched in the engine PWB.
    Defective engine PWB. Replace the engine PWB
6000 Broken fuser heater lamp wire The temperature does not reach 100C/ 212F after the fuser heater lamp has been turned on continuously for 30 s. Poor contact in the fuser thermistor 1 connector terminals. Reinsert the connector
  35/37 ppm printer (EUR/USA model): The temperature does not rise by 1C/ 1,8F after the fuser heater lamp has been turned on continuously for 5 s during printing. Fuser thermistor 1 installed incorrectly. Check and reinstall if necessary
  Thermal cutout triggered. Check for continuity. If none, replace the thermal cutout
  40/42 and 45/47 ppm printers (EUR/USA model): The temperature does not rise by 1C/ 1,8F after the fuser heater lamp has been turned on continuously for 10 s during warm-up or at standby. Fuser heater lamp installed incorrectly. Check and reinstall if necessary
  Broken fuser heater lamp wire. Check for continuity. If none, replace the fuser heater lamp
6020 Abnormally high fuser thermistor 2 temperature The temperature of the fuser thermistor 2 detects 240C/464F or more continuously for 3 s. Shorted fuser thermistor 2. Measure the resistance. If it is 0 Q, replace the fuser thermistor 2
  Defective engine PWB. Replace the engine PWB
6030 Broken fuser thermistor 2 wire Input from fuser thermistor 2 is less than 1 (A/D value) for more than 1 s. Poor contact in the fuser thermistor 2 connector terminals. Reinsert the connector
    Broken fuser thermistor 2 wire. Measure the resistance. If it is 0 Om, replace the fuser thermistor 2
    Fuser thermistor 2 installed incorrectly. Check and reinstall if necessary
    Thermal cutout triggered. Check for continuity. If none, replace the thermal cutout
    Fuser heater lamp installed incorrectly. Check and reinstall if necessary
    Broken fuser heater lamp wire. Check for continuity. If none, replace the fuser heater lamp
6120 Abnormally high fuser thermistor 1 temperature The temperature of the fuser thermistor 1 detects 240C/464F or more continuously for 3 s. Shorted fuser thermistor 1. Measure the resistance. If it is 0 Om, replace the fuser thermistor 1
  Defective engine PWB. Replace the engine PWB
6130 Broken fuser thermistor 1 wire Input from fuser thermistor 1 is less than 1 (A/D value) for more than 1 s. Poor contact in the fuser thermistor 1 connector terminals. Reinsert the connector
    Broken fuser thermistor 1 wire. Measure the resistance. If it is open replace the fuser thermistor 1
    Fuser thermistor 1 installed incorrectly. Check and reinstall if necessary
6220 Abnormally high fuser thermistor 3 temperature The temperature of the fuser thermistor 3 detects 250C/482F or more continuously for 3 s. Shorted fuser thermistor 3. Measure the resistance. If it is 0 Om replace the fuser thermistor 3
  Defective engine PWB. Replace the engine PWB
6230 Broken fuser thermistor 3 wire Input from fuser thermistor 3 is less than 1 (A/D value) for more than 1 s. Poor contact in the fuser thermistor 3 connector terminals. Reinsert the connector
    Broken fuser thermistor 3 wire. Measure the resistance. If it is open, replace the fuser thermistor 3
    Fuser thermistor 3 installed incorrectly. Check and reinstall if necessary
6400 Zero cross signal error The ZCROSS signal does not reach the engine PWB for more than 2 s. Defective harness between connect-L PWB (YC8) and engine PWB (YC3), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
    Defective connection between power source unit (YC103) and connect-L PWB (YC1). Reinsert the connector.
    Defective power source unit. Replace the power source unit
    Defective engine PWB. Replace the engine PWB
7000 Toner motor lock error A motor over-current signal is detected continuously for 5 seconds since the toner motor is activated. Lump of toner inside toner container. Replace the toner container.
  Defective toner replenishment drive system. Replace the developing unit
    Defective toner motor. Replace the developing unit
    Defective engine PWB. Replace the engine PWB
7410 Drum unit non- installing error The drum unit is not installed or not installed properly. The drum PWB EEPROM does not communicate normally. The drum unit is not installed. Install the drum unit
  Defective connection drum PWB (YC1) and connect-L PWB (YC3). Check the connection of connectors drum PWB (YC1) and connect-L PWB (YC3).
    Defective drum PWB EEPROM. Replace the drum unit
    Defective engine PWB. Replace the engine PWB
FO F000 Communication problem between the main PWB and operation panel PWB Communication is failed between the operation panel PWB and the main PWB. Defective main PWB. Turn the power switch off/on to restart the printer.lf the error is not resolved, replace main PWB
  Defective operation panel PWB. Replace the operation panel PWB.
F010 Main PWB checksum error Defective main PWB. Turn the power switch off/on to restart the printer.lf the error is not resolved, replace main PWB
F020 Main or expanded memory error Checksum failed with main memory (RAM) on the main PWB or expanded memory (DIMM). Defective system main memory (RAM) on the main PWB. Turn the power switch off/on to restart the printer.lf the error is not resolved, replace main PWB
    Defective expanded memory (DIMM). Replace the expanded memory (DIMM)
F030 General failure Miscellaneous failure with the main PWB. Defective main-PWB. Turn the power switch off/on to restart the printer.lf the error is not resolved, replace main PWB
F040 Main PWB - engine PWB communication error Communication between main PWB and engine PWB is failed. Defective harness between engine PWB (YC12) and main PWB (YC12), or improper connector insertion. Reinsert the connector. Also check for continuity within the connector harness. If none, remedy or replace the harness.
    Defective main PWB. Turn the power switch off/on to restart the printer.lf the error is not resolved, replace main PWB
    Defective engine PWB. Replace the engine PWB
F050 Engine PWB ROM checksum error A checksum error occurred with ROM on the engine PWB. Some error may have occurred when downloading the firmware of the engine PWB. Download the firmware of the engine PWB again using the memory card
    Defective engine PWB. Turn the power switch off/on to restart the printer. If the error is not resolved, replace the EEPROM on the engine PWB or engine PWB
F186 Main PWB video data control error Defective main-PWB. Turn the power switch off/on to restart the printer.lf the error is not resolved, replace main PWB

, , : 0100, 0110, 0120, 0150, 0170, 0420, 1010, 1140, 1150, 2000, 2200, 4000, 4200, 5100,
6000, 6020, 6030, 6120, 6130, 6220, 6230, 6400, 7000, 7410, FO F000, F010, F020, F030, F040, F050, F186.
Kyocera FS-2020 D, FS-3920 DN, FS-4020 DN



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