Code :

Code: C-2816
Description: Drum charger capacity deterioration. When the charger grid/ developing bias is in excess of the limit of correction, lower the developing potential/ fogging margin potential in steps of 50V. As a result, less than 50V of the difference with the target charger potential is detected 10 times in succession.
Causes: • Drum potential sensor (DPS) • Drum potential sensor board (DPSB) • Charging corona • High voltage unit /1 (HV1)
Remedy: 1. Clean the power feed section for the charger. 2. Check the DPS, and clean/replace it if any abnormality or dirt on sensor (Wiring diagram: Main body (3/4): 19-J) 3. Check the charger (charging wire and the grid), and clean/repair it if there is any dirt or abnormality. 4. Check the drum, and clean/repair it if there is any dirt or abnormality. 5. Check the connector connection and the wiring between HV1 and the charger, and repair it if any abnormality. (Wiring diagram: Main body (3/4): 22-K). 6. Replace DPS. 7. Replace DPSB. 8. Replace the drum. 9. Replace HV1.

Code: C-2821
Description: The toner supply prohibition status is not released 1. Even though the TCR sensor (TCRS) output increases, the number of the toner supply prohibition status continuity is detected 30 times, and more than 2.5V of the TCRS output value is detected.
Causes: • Developing unit • TCR sensor (TCRS) • Printer control board (PRCB)
Remedy: 1. Check the developing section, and clean/repair it if there is any dirt or abnormality. 2. Check the connector connection and the wiring between PRCB and TCRS, and repair it if any abnormality. 3. Replacing the developing unit 4. Replace PRCB.

Code: C-2822
Description: The toner supply prohibition status is not released 2. The number of the toner supply prohibition status continuity becomes 100 times.
Causes: • Developing unit • TCR sensor (TCRS) • Printer control board (PRCB)
Remedy: 1. Check the developing section, and clean/repair it if there is any dirt or abnormality. 2. Check the connector connection and the wiring between PRCB and TCRS, and repair it if any abnormality. 3. Replacing the developing unit 4. Replace PRCB.

Code: C-3102
Description: Fusing pressure release motor (M33) operation time abnormality 1. When M33 moves from the release position to the pressure position, the fusing pressure home sensor (PS58) does not turn ON within a specified period of time.(PRO 951 is unimplemented) The same abnormality occurs when the fusing unit exclusively for PRO 951 is set to PRESS 1250/1250P/1052.
Causes: • Fusing unit • Fusing pressure position sensor (PS58) • Fusing pressure release motor (M33) • Printer control board (PRCB)
Remedy: 1. Check that the proper fusing unit is installed, and replace it if the wrong one is installed 2. Check the fusing pressure release section, and clean/repair it if any abnormality. 3. Check the connector connection and the wiring between PRCB and motor/sensor, and repair it if any abnormality. 4. Check I/O and the operation of the sensor, and repair/replace it if any abnormality. (Wiring diagram: Main body (3/4): 7-I). 5. Check the I/O drive of the motor and the coupling of the gear, and repair/replace it if any abnormality. (Wiring diagram: Main body (3/4):7-I) 6. Replace PS58. 7. Replace M33. 8. Replace PRCB.

Code: C-3103
Description: Fusing pressure release motor (M33) operation time abnormality 2. The fusing pressure home sensor (PS58) ON is not detected within a specified period of time after the main power turns ON. When M33 moves from the pressure position to the release position, PS58 does not turn ON within a specified period of time. (PRO 951 is unimplemented) The same abnormality occurs when the fusing unit exclusively for PRO 951 is set to PRESS 1250/1250P/1052.
Causes: • Fusing unit • Fusing pressure position sensor (PS58) • Fusing pressure release motor (M33) • Printer control board (PRCB)
Remedy: 1. Check that the proper fusing unit is installed, and replace it if the wrong one is installed 2. Check the fusing pressure release section, and clean/repair it if any abnormality. 3. Check the connector connection and the wiring between PRCB and motor/sensor, and repair it if any abnormality. 4. Check I/O and the operation of the sensor, and repair/replace it if any abnormality. (Wiring diagram: Main body (3/4): 7-I) 5. Check the I/O drive of the motor and the coupling of the gear, and repair/replace it if any abnormality. (Wiring diagram: Main body (3/4):7-I) 6. Replace PS58. 7. Replace M33. 8. Replace PRCB.

Code: C-3104
Description: Abnormality when the fusing unit used exclusively for PRESS1250/1250P/1052 or EF-120 is set to PRO 951. An error is detected in the following conditions with the fusing unit used exclusively for PRESS1250/1250P/1052 or EF-102 is set to PRO 951. In case that either of the fusing pressure home sensor (PS58), fusing pressure position sensor /1 (PS59), fusing pressure position sensor /2 (PS60) and fusing pressure position sensor /3 (PS61) turns ON when both the ADU knob set and the fusing unit set are detected.
Causes: • Fusing unit • Printer control board (PRCB)
Remedy: 1. Check that the proper fusing unit is installed, and replace it if the wrong one is installed 2. Check the connector connection and the wiring between PRCB and motor/sensor, and repair it if any abnormality 3. Replace PRCB.

Code: C-3201
Description: Drum motor (M24) power abnormality + 24V power abnormality. When M24 turns ON, error detection signals (blowout of ICP and the 24V cut off) are detected.
Causes: DC power supply /2 (DCPS /2)
Remedy: 1. Check the connector connection and the wiring between ACDB and DCPS /2, and repair it if any abnormality. 2. Replace DCPS /2

Code: C-3202
Description: Web motor (M24) power abnormality. An error detection signal (blowout of ICP) is detected when M24 turns ON. At this time, an error detection signal (24V cut off) is not detected.
Causes: • Web motor (M24) • Charger cleaning motor (M23) • Printer control board (PRCB)
Remedy: 1. Check the connector connection and the wiring between PRCB and the motor, and repair it if any abnormality. 2. Check the I/O drive of the motor and the coupling of the gear, and repair/replace it if any abnormality. (Wiring diagram:Main body (2/4): 3-A, Main body (3/4): 16-I) 3. Replace M24, M23 and PRCB at a time.