• Code: SC558
• Description: Zero cross signal abnormal - Timing & Condition - Zero cross signals generated within a certain period do not reach a predetermined number.
• Causes: • Poor connection of connectors • Blown fuse • Defective PSU • Defective main control board • Defective I/O control board
• Remedy: 1. Check if the following connectors are properly connected; • CN205 and CN218 on the I/O control board • CN303 on the main control board • CN106 on the PSU 2. Check the continuity of the signal lines of the above cables. 3. Replace the PSU, I/O control board, or main control board by checking the signal line at each pin. - Signals to Check - • Zero cross: CN106-3 on PSU/ CN205-A6, TP250, or CN218-B8 on I/O control board / CN303-B4 or TP170 on main control board

• Code: SC601
• Description: Scanner IPU communication error - Timing & Condition - After the main control board communicates successfully with the scanner IPU board once, a communication error is detected.
• Causes: • Poor connection of connectors • Defective scanner IPU board • Defective main control board
• Remedy: 1. Turn the main power switch off/on. 2. Check if the connectors (CN412 and CN407) are properly connected on the sub control board and scanner IPU board. 3. Replace the scanner IPU board. 4. 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 IPU board sends a command and this error is detected 3 times in total.
• Causes: • Poor connection between the IDU and scanner IPU board • Defective IDU board • Defective scanner IPU board
• Remedy: 1. Check if the IDU board is properly connected to the scanner IPU board. 2. Replace the IDU board. 3. Replace the scanner IPU board.

• Code: SC620
• Description: ADF communication error - Timing & Condition - After the main control board communicates successfully with the ARDF once, a communication error is detected.
• Causes: • Poor connection or damaged cable • Defective ARDF main board • Defective main control board
• Remedy: 1. Check that the cable is properly connected 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 - Just after the main switch is turned on or while the sorter is running - Condition - The main control board detected a communication error with the sorter main board.
• Causes: • Poor connection or damaged fibreoptic cable • Defective sorter main board • Defective main control board
• Remedy: 1. Check that the fibre-optic cable is properly connected 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 the FPU while the FPU is operating or after the FPU completes the operation.
• Causes: • Poor connection or damaged fibreoptic cable • Defective FPU main board • Defective scanner IPU board
• Remedy: 1. Check that the fibre-optic cable is properly connected 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: Paper tray unit communication error - Timing - Just after the main switch is turned on or while the paper tray unit is running - Condition - The main control board detected a communication error with the paper tray unit.
• Causes: • Poor connection or damaged cables • Defective CSS/bank interface board • Defective paper tray unit control board • Defective main control board
• Remedy: 1. Check that the cables are properly connected on the main control board, CSS/bank interface board, and paper tray unit control board or check if the cables are is damaged. 2. Replace CSS/bank interface board. 3. Replace the paper tray unit control board. 4. Replace the main control board.

• Code: SC630
• Description: RDS communication error - Timing & Condition - The main control board receives no response from RDS when accessing it. Even when this error is detected, the copier does not show the SC code and this SC code is not logged. (Copier functions are still working.)
• Causes: • Poor connection or damaged cable • Defective line adapter • Defective CSS/bank interface board • Defective main control board
• Remedy: 1. Check that the cables are properly connected on the CSS/bank interface board and main control board or check if the cables are damaged. 2. Check and/or change the setting of the line adapter or replace it. 3. Replace the CSS/bank interface board. 4. Replace the scanner IPU board.