• Code: SC557
• Description: Pressure roller temperature does not increase - Timing - at every 1 second, 2minutes after the main switch turned on and before the hot roller temperature does not reach to the ready condition - Condition - The pressure roller temperature does not increase by no more than 3°C for a minutes during warm-up.
• Causes: • Poor connection of connectors • Pressure roller fusing lamp brown • Pressure roller thermofuse opened • Defective main control board • Defective I/O control board • Defective AC drive board
• Remedy: 1. Check if the following connectors are properly connected; • Hot roller fusing lamp connectors • CN303 on the main control board • CN212 and CN229 on the I/O control board • CN7 on the AC drive board 2. Replace the hot roller fusing lamp if it is opened. 3. Replace the hot roller thermofuse if it is opened. 4. Replace the main control board, I/O control board, or AC drive board by checking the trigger signal at each pin. [ Signal Check ] • Pressure roller fusing trigger: CN303-B7 on main control board / CN212-B5, TP240, or CNCN229-4 on I/O control board / CN7-7 on AC drive board.

• Code: SC558
• Description: Zero cross signal abnormal - Timing & Condition - Zero cross signals generated within certain period does not reach a predetermined number.
• Causes: • Poor connection of connectors • Blown fuse • Defective AC drive board • Defective main control board • Defective I/O control board
• Remedy: 1. Check if the following connectors are properly connected; • CN212 and CN229 on the I/O control board • CN303 on the main control board • CN7 on the AC drive board 2. Check the continuity of the signal lines of the above harnesses. 3. Replace the fuse (FU101) if it is blown. 4. Replace the AC drive boar, I/O control board, or main control board by checking the signal line at each pin. [ Signal Check ] • Zero cross: CN7-5 on AC drive board / CN229-6, TP216, or CN212-B8 on I/O control board / CN303-B4 or TP120 on main control board

• Code: SC601
• Description: Scanner IPU communication error - Timing & Condition - After the main control board communicate successfully with the scanner IPU board once, communication error is detected.
• Causes: • Poor connection of connectors • Defective sub/main scanner IPU board • Defective main control board
• Remedy: 1. Check if the connectors (CN355 and CN407) are properly connected on the sub control board and scanner IPU board. 2. Replace the sub and/or main scanner IPU board. 3. Replace the main control board.

• Code: SC604
• Description: IDU communication error - Timing & Condition - No response is received from the IDU within 200 ms after the scanner IP board sends a command signal and this error is detected 3 times in total.
• Causes: • Poor connection between the IDU and scanner control boards • Defective IDU board • Defective sub/main scanner IPU board
• Remedy: 1. Check if the IDU board is properly connected to the sub scanner IPU board is p. 2. Replace the IDU board. 3. Replace the scanner sub and/or main IPU board.

• Code: SC620
• Description: ADF communication error - Timing & Condition - After the main control board communicate successfully with the ARDF once, communication error is detected
• Causes: • Poor connection of optical-fiber cable or damaged • Defective ARDF main board • Defective main control board
• Remedy: 1. Check the connector of the optical-fiber cable is properly set on the ADF main board and main control board or check if it is damaged. 2. Replace the ARDF main board. 3. Replace the main control board.

• Code: SC621
• Description: Sorter communication error - Timing - When the main switch is turned on or while Sorter is running - Condition - The main control board detected a communication error with the Sorter main board.
• Causes: • Poor connection of optical-fiber cable or damaged • Defective Sorter main board • Defective main control board
• Remedy: 1. Check the connector of the optical-fiber cable is properly set on the Sorter main board and main control board or check if it is damaged. 2. Replace the sorter main board. 3. Replace the main control board.

• Code: SC625
• Description: FPU communication error - Timing & Condition - The scanner IPU board detected a communication error with FPU during the FPU is operating or after the FPU completes the operation.
• Causes: • Poor connection of optical-fiber cable or damaged • Defective FPU main board • Defective scanner IPU board
• Remedy: 1. Check the connector of the optical-fiber cable is properly set on the FPU main board and main control board or check if it is damaged. 2. Replace the FPU main board. 3. Replace the scanner IPU board.

• Code: SC626
• Description: LCT communication error - Timing - When the main switch is turned on or while LCT is running - Condition - The main control board detected a communication error with the LCT main board.
• Causes: • Poor connection of harnesses or damaged • Defective I/F board RDS/LCT • Defective LCT main board • Defective main control board
• Remedy: 1. Check the connectors of harnesses are properly set on the main control board, I/F board RDS/LCT, and LCT main board or check if it is damaged. 2. Replace I/F board RDS/LCT board. 3. Replace the LCT main board. 4. Replace the main control board