Fixing Kyocera FS7028M Printer Error Codes in details

Fixing Kyocera FS7028M Printer Error Codes in details

– Printer model: Kyocera FS7028M
– Fix Error codes on Kyocera FS7028M model and its description:

• Code: A1
• Description: Uninstalled waste toner conveyer
  The waste toner conveyer is not installed, or the conveyer is clogged inside with waste toner.
• Causes: • Waste toner converyer is not installed. • The belt is not rotating in the conveyer unit. • Connection failure between the CON1 board and the conveyer board • Engine gate arrays (U2/U6) failure • Defective LED driving circuit on the engine board. Defective LED on the conveyer board. Connection failure between the waste toner conveyer board and the photo transistor. Defective photo transistor. • Contaminated waste toner conveyer housing or photo receptor. • The waste toner driving system in the toner container is not working properly.

• Code: A2
• Description: Fuser overheating
  The fuser unit is overheating.
• Causes: • Defective photo-coupler (low voltage) for heaters • Defective engine gate array U2 • Defective heater control circuit (engine board) or heater temperature detector

• Code: A3
• Description: Fuser heater disconnection
  Either or both heater lamp(s) is blown out.
• Causes: • Blown-out heater lamp(s) • Defective connection between the engine board and the low voltage supply. • Malfunctioning engine CPU • Defective heater disconnection sensor circuit in the low voltage supply • Defective thermo-cut (Replace the fuser unit.)

• Code: A4
• Description: Developer unit life-fuse error
  The life fuse won’t cut in the developer unit.
• Causes: • Defective engine gate array • Defective fuse cut circuit on the engine board

• Code: B1 … B6
• Description: Feed cassette bottom plate motor error
  The feed cassette bottom plate motor won’t revolve.
• Causes: • Excessive torque on the motor (activating the current protection circuit) • Stuck motor • Defective feed board PU (U1) • Defective motor driver circuit (transistors) or over-current detector circuit

• Code: C1
• Description: Duplex communication error
  Communication error between the duplexer and the printer.
• Causes: • Defective engine gate array (U6) • Defective engine CPU (U1) • Duplexer CPU (U1) malfunction • Defective U2, U5, U6 on duplexer board • Defective connection between KP-544 (YC4) and KP-568 (YC1), KP-568 (YC3) and liaison connector, liaison connector and KP-587 (YC1), or defective liaison connector

• Code: C2
• Description: Duplex printing registration error
  The duplexer’s registration boards are not in the home position.
• Causes: • Defective registration motor • Defective home position sensor • Malfunctioning motor driving circuit (U2/U6/U7) on duplexer board • Defective duplxer CPU (U1) • Connection error between the registration motor and KP-587 (YC5), or home position sensor and KP-587 (YC7)

• Code: C4
• Description: DF-30 IPC communication error
  Communication error with the document finisher DF-30
• Causes: • Defective IPC (intelligent protocol controller) LSI (communication chip) • Defective interface connector/cable

• Code: C5
• Description: DF-30 backup RAM error
• Causes:

• Code: C6
• Description: DF-30 sensor error
• Causes: This error means any of the following sensors in the DF-30 is defective: • Input sensor • Exit path sensor • Inversion sensor • Printer connection sensor • Stack height limit sensor • Stack home position sensor • Offset sensor • Cover sensor • Stacker full sensor

• Code: C8
• Description: DF-30 staple unit movement motor error
  The staple unit movement motor does not rotate.
• Causes: • The driver circuit for the motor is defective. • The staple unit is defective. • The motor is defective.

• Code: C9
• Description: DF-30 staple motor error
• Causes:

• Code: CA
• Description: DF-30 alignment motor error
• Causes:

• Code: CB
• Description: DF-30 tray motor error
• Causes:

• Code: CC
• Description: DF-30 paper feed motor erroru
• Causes:

• Code: CD
• Description: DF-30 paper exit motor error/Sorter error
• Causes: The CD error also suggests that the sorter ST-30 is defective.

• Code: D0 … D4
• Description: Firmware program errorserroru
• Causes:

• Code: E0
• Description: Communication failure
  The engine controller does not respond to the main controller.
• Causes: • Error with CPU and gate arrays of either the engine or main controller • Connection error between the engine board and the main controller board • Program overrun in the engine or main controllere

• Code: E1
• Description: Main motor error
  The main motor won’t revolve, or will revolve too slow.
• Causes: • Error with CPU and gate arrays of either the engine or main controller • The motor brake circuit is activated because of an abnormal torque of the motor. • Overheating protection circuit is activated because of the overheating main motor IC • Defective engine gate array (U2) • Defective main motor driving circuit (transistor arrays, etc.) on the engine board • Defective buffer IC for FG signal detection on the engine board

• Code: E2
• Description: Laser scanner motor error
  The revolution of the polygon motor does not reach the predetermined revolution.ner mo
• Causes: • Defective scanner motor (e.g., at its axle holder) • Connection error between polygon motor and liaison connector, or liaison connector and KP- 570 (YC3) • Defective engine gate array (U2/U6) • Defective scanner motor driver transistor

• Code: E3
• Description: Laser beam detection error
  Beam detection is failed. The photo detector failed to detect laser beam.lutio
• Causes: • Laser diode does not emit. • Connectionerror between KP-578 (YC2) and KP-579 (YC101 [within scanner]), KP-578 (YC1) and KP-570 (YC2), KP-578 (YC1) and KP-564 (YC3), KP-570 (YC1) and KP-564 (YC3), or KP-572 (YC1) and KP-564 (YC3) • Defective or contaminated pin-photo IC • Malfunctioning interlock detection circuit on the ending board • Defective engine gate array U2

• Code: E4
• Description: Fuser heater error
  The fuser heater does not turn on. [E4 is indicated immediately after power is on.] The fuser heater does not turn on. [E4 is indicated several minutes after power is on.]
• Causes: • Connection error between the engine board and the fuser unit • Defective engine gate array U2 • Defective comparators on the engine board • Defective thermistor (cut) • Connection error between the fuser board and the thermistor • Connection error between the engine board and the low-voltage power supply • Defective engine gate array U2 • Defective transistors, logic gate ICs, comparators, etc. on the engine board • Defective thermistor (showing high resistance even at heating)

• Code: E5
• Description: Eraser error
  The eraser does not turn on.
• Causes: • Connector error between CON1 board and the drum liaison board • Defective connector between the drum liaison board and the drum board • Defective transistors and logic gate ICs in the eraser controller circuit on the engine board • Connection error between drum unit board and eraser lamp • Broken eraser lamp

• Code: E8
• Description: Fuser unit life fuse error
  The fuser unit life fuse won’t blow out.
• Causes: • Defective gate array U6 • Defective fuse cut circuit on the engine board

– Kyocera FS7028M printer Error Codes and quick guide to troubleshooting:

• Code: E9
• Description: Toner motor error
  The toner motor does not revolve, or the current protection circuit is activated.
• Causes: • Overcurrent in the toner motor circuitry due to an excessive torque • Toner motor locked • Defective gate array U2 • Defective toner motor driver transistor or overcurrent detector.

• Code: F0
• Description: Controller system lock error
  Main controller can not communicate with control panel [shown approx. 30 seconds since OS fails to continue operating.]
• Causes: Connection error between main controller board and engine controller board, engine board and CON1 board, or CON1 board and front panel board.

• Code: F1
• Description: Main controller ROM checksum error
  Checksum is failed with the system ROM
• Causes:

• Code: F2
• Description: RAM read/write error
  Checksum is failed with the RAM on the main controller board.
• Causes:

• Code: F3
• Description: Controller system error
• Causes:

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