• Code: SC171
• Description: Video processing error 2 - Timing - Same as SC170 - Condition - The corrected black level is not in the proper range.
• Causes: • Poor connection of CCD flat cable • Defective scanner IPU board • Defective CCD
• Remedy: 1. Check if the flat cable is firmly connected at CN421 and CN404 on the SBU and scanner IPU board. 2. Check the continuity of the flat cable. 3. Replace the scanner IPU board. 4. Replace the SBU unit.

• Code: SC172
• Description: Video processing error 3 - Timing - Same as SC170 - Condition - The corrected white level is not in the proper range.
• Causes: • Poor connection of CCD cable • Dirty optics • Defective lamp regulator • Defective scanner IPU board • Defective CCD
• Remedy: 1. Check SP 4-426-001 to 006 (RGB Gain). If their values are near “255”, clean the optics section (exposure glass, white plate, mirrors, and lens). 2. Visually check if the exposure lamp turns on during warming-up after the main switch is turned on. If not, replace the lamp regulator. 3. Check if the CCD flat cable is firmly connected at CN421 and CN404 on the SBU and scanner IPU board. 4. Check the continuity of the flat cable. 5. Replace the scanner IPU board. 6. Replace the SBU unit.

• Code: SC191
• Description: Bar code scan error - Timing - Just after the main switch is turned on - Condition - The scanner IPU board detects that the bar code pattern scanned in is not appropriate.
• Causes: • Non-standard bar code label • Improper location of bar code • Dirty bar code • Defective scanner IPU board • Defective main control board
• Remedy: 1. Check if the bar code is damaged or scratched. 2. Clean the optics section components, such as mirrors and lenses, and the bar code label. 3. Check if the mirrors are properly positioned on the 1st and 2nd scanners. If the spring plate which secures the mirrors is out of position, it causes the light axis to be changed. 4. Replace the scanner IPU board. 5. Replace the main control board.

• Code: SC192
• Description: Bar code number mismatch - Timing - Just after the main switch is turned on - Condition - The main control board detects that the bar code data scanned in does not match the machine identification number stored in the RAM.
• Causes: • Defective RAM board • Defective scanner IPU board • Defective main control board
• Remedy: 1. Check if the serial number stored in the RAM is correct. NOTE:. Contact your product specialist for the detailed procedure. 2. Check the copier's serial number and the number defined in SP mode. 3. Garbled ROM data: Replace the NV-RAM. 4. Replace the scanner IPU board. 5. Replace the main control board.

• Code: SC193
• Description: IDU error - Timing - Just after the main switch is turned on or during a hardware reset - Condition - The IDU starts self-diagnosis at power-on and a hardware error was detected during this.
• Causes: • Defective IDU • Defective scanner IPU board
• Remedy: 1. Test the scanner IPU board (SP 4-904-001 and 002). If not OK, replace the scanner IPU board. 2. Replace the IDU board.

• Code: SC195
• Description: Serial number error - Timing - Just after the main switch is turned on - Condition - The serial number entered or stored in RAM is not correct.
• Causes: • Incorrect serial number • RAM board is replaced. • Defective RAM
• Remedy: 1. Check and re-enter the serial number properly. NOTE: Contact your product specialist for the detailed procedure.

• Code: SC301
• Description: Charge current leak - Timing - When the charge corona unit is on during printing or process control - Condition - The current leak was detected for 2 seconds.
• Causes: • Charge corona unit not installed properly • Poor connection of cables • Defective high voltage supply board (C,G) • Defective I/O control board • Defective main control board.
• Remedy: 1. Reinstall the charge corona unit properly or replace the charge corona unit. 2. Reconnect the connectors on the high voltage supply board (C,G), I/O control board, and main control board, or check the cables. 3. Check and clean the charge corona unit receptacle. 4. Replace the high voltage supply board (C,G). 5. Replace the I/O control board. 6. Replace the main control board. - Signals to Check - • Leak detection: CN201-1 or TP224 on I/O control board or TP162 on main control board

• Code: SC302
• Description: Charge corona grid voltage error - Timing - When the charge corona unit grid is on during printing or process control - Condition - The feedback voltage is 4.8V or higher, or the PMW value is 50% or higher for 500 ms continuously.
• Causes: • Charge corona unit not installed properly • Poor connection of cables • Defective high voltage supply board (C,G) • Defective I/O control board • Defective main control board.
• Remedy: 1. Reinstall the charge corona unit properly or replace the charge corona unit. 2. Reconnect the connectors on the high voltage supply board (C,G), I/O control board, and main control board, or check the cables. 3. Check and clean the charge corona unit receptacle. 4. Replace the high voltage supply board (C,G). 5. Replace the I/O control board. 6. Replace the main control board. - Signals to Check - • Leak detection: CN201-1 or TP224 on I/O control board or TP162 on main control board Signals to Check - • Feedback signal: CN201-3 or TP226 on I/O control board or CN302-A4 or TP160 on main control board • PWM: CN201-4 or TP237 on I/O control board