• Code: SC764
• Description: Cross folder fold plate HP sensor (U) error The state (on/off) of the upper fold plate HP sensor did not change within 1 sec. after the fold plate motor (U) switched on
• Causes: • Undetected paper or scraps have jammed the fold mechanism • HP sensor harness loose, broken, defective • Motor harness loose, broken defective • HP sensor defective • Motor defective • MCU defective
• Remedy:

• Code: SC765
• Description: Cross folder fold plate HP sensor (L) error The state (on/off) of the lower fold plate HP sensor did not change within 1 sec. after the fold plate motor (L) switched on
• Causes: • Undetected paper or scraps have jammed the fold mechanism • HP sensor harness loose, broken, defective • Motor harness loose, broken defective • HP sensor defective • Motor defective • MCU defective
• Remedy:

• Code: SC790
• Description: Fan folder PCB fan motor error A motor lock signal was detected at the PCB cooling fan for more than 20 sec. after the fan was switched on.
• Causes: • Fan overloaded due to physical obstruction • Fan motor harness loose, broken, defective • Fan motor defective • MCU defective
• Remedy:

• Code: SC816
• Description: Energy save I/O sub system error GW An error occurred in the energy save sub system. This error occurs only when energy sub system module such as ASIC Whistle is present.
• Causes: • Cycle the machine power off/on • If cycling the machine off/on does not restore normal operation, replace the IOB.
• Remedy:

• Code: SC818
• Description: Watchdog error While the system program is running, a bus hold or interrupt program goes into an endless loop, preventing any other programs from executing.
• Causes: • System program defective; switch off/on, or change the controller firmware if the problem cannot be solved • Controller board defective • Replace the peripheral device
• Remedy:

• Code: SC819
• Description: Fatal kernel error GW Due to a control error, a RAM overflow occurred during system processing. One of the following messages was displayed on the operation panel.
• Causes: • System program defective • Controller board defective • Optional board defective • Replace controller firmware For more details about this SC code error, execute SP5990 to print an SMC report so you can read the error code. The error code is not displayed on the operation panel.
• Remedy:

• Code: SC820
• Description: Sellf-diagnostic error 1: CPU
• Causes: An unexpected error occurred, or the boot monitor program or self-diagnostic program generated an interrupt. In either case, this is a fatal error.
• Remedy: • Replace the controller board • Update (upload again) all firmware modules to restore the boot program and the self-diagnostics. This SC displays up to approximately 50 number codes. These codes are used to find design problems and have no meaning for service technicians. The procedure for solving the problem is the same in every case.

• Code: SC821
• Description: Self-diagnostic error 2: ASIC GW The ASIC provides the central point for the control of bus arbitration for CPU access, for option bus and SDRAM access, for SDRAM refresh, and for management of the internal bus gate.
• Causes: 0B00 Error code 0xffff ffff is returned when the register Write & Verify check is executed on the ASIC mounted on the controller board. The ASIC controls the ROM and buses for other devices. • ASIC defective, replace the controller board 0D05 The interrupts of the ASIC and CPU are not timed correctly. • ASCI timing device defective, or CPU defective. Replace the controller board.
• Remedy: