• Code: C-4307
• Description: Charger suction fan (FM3) rotation abnormality 1. The FM3 EM error detection signal is detected twice in succession within a specified period of time after FM3 was turned ON. However, error detection signal (24V cut off) is not detected.
• Causes: • Charger suction fan (FM3) • Printer control board (PRCB)
• Remedy: 1. Check the connector connection and the wiring between PRCB and the fan, and repair it if any abnormality. 2. Rotate the fan or I/O by hand, and repair it if any abnormality. (Wiring diagram: Main body (2/4): 10-A) 3. Replace FM3. 4. Replace PRCB.

• Code: C-4314
• Description: Front cooling fan (FM18) rotation abnormality + 24V power abnormality. The abnormal status is detected twice in succession after FM18 was turned ON. At this time, an error detection signal (24V cut off) is 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-4316
• Description: Front cooling fan (FM18) rotation abnormality. The FM26 EM error detection signal is detected twice in succession within a specified period of time after FM18 was turned ON. However, error detection signal (24V cut off) is not detected.
• Causes: • Front cooling fan (FM18) • Printer control board (PRCB)
• Remedy: 1. Check the connector connection and the wiring between PRCB and the fan, and repair it if any abnormality. 2. Rotate the fan or I/O by hand, and repair it if any abnormality. (Wiring diagram: Main body (2/4): 8-A) 3. Replace FM18. 4. Replace PRCB.

• Code: C-4701
• Description: FIFO address abnormality for the printer. While in the image write, the expansion processing of image data that is read in is not correctly terminated.
• Causes: Image processing board (IPB)
• Remedy: 1. Check the connector connection and the wiring on IPB, and repair it if any abnormality. 2. Replace IPB.

• Code: C-4702
• Description: Compression input FIFO abnormality. An error interrupt occurs with the compression/ expansion chip FIFO.
• Causes: Image processing board (IPB)
• Remedy: 1. Check the connector connection and the wiring on IPB, and repair it if any abnormality. 2. Replace IPB.

• Code: C-4703
• Description: Elongation abnormality. Due to the elongation of data the compression of which is not completed, the destruction of the compressed data and the abnormal length of data, an elongation abnormality is detected.
• Causes: Image processing board (IPB)
• Remedy: 1. Check the connector connection and the wiring on IPB, and repair it if any abnormality. 2. Replace IPB.

• Code: C-4705
• Description: Printer time out.
• Causes: • Printer control board (PRCB) • Image processing board (IPB)
• Remedy: 1. Check the connector connection and the wiring on IPB, and repair it if any abnormality. 2. Check the connector connection and the wiring on PRCB, and repair it if any abnormality. 3. Check the connector connection and the wiring between IPB and PRCB, and repair it if any abnormality. 4. Replace IPB. 5. Replace PRCB.

• Code: C-4706
• Description: Expansion device access abnormality. While in the image write, despite of no resource provided, an inappropriate processing such as accessing to the elongation device is made.
• Causes: Image processing board (IPB)
• Remedy: 1. Check the connector connection and the wiring on IPB, and repair it if any abnormality. 2. Rewrite the firmware for image control. 3. Replace IPB.