Code :

Code: SC640
Description: BCU - Controller communicatio n error (check sum error) The check sum of the interface between the BCU and controller is not the same.
Causes: • Defective controller • Defective PCU
Remedy: 1. Turn the main switch off and on. 2. Replace the controller. 3. Replace the BCU.

Code: SC641
Description: BCU – Controller communicatio n error (no response) The controller does not receive any response from the BCU three consecutive times when sending a signal every 100ms.
Causes: • Loose connection • Defective controller • Defective BCU
Remedy: 1. Turn the main switch off and on. 2. Check the connection between the BCU and controller. 3. Replace the controller. 4. Replace the BCU.

Code: SC670
Description: No response from BCU at power on When the main power is turned on or the machine starts warming up from energy-saving mode, the controller does not receive a command signal from the BCU.
Causes: • Loose connection • Defective controller • Defective BCU
Remedy: 1. Turn the main switch off and on. 2. Check the connection between the BCU and controller. 3. Replace the controller. 4. Replace the BCU.

Code: SC680
Description: BCU/ MUSIC communicatio n error After the engine CPU sends a message, the Music CPU does not respond within five seconds three consecutive times.
Causes: • Toner cartridge memory chip loose connection • Memory chip problem • Memory chip cable wiring problem
Remedy: 1. Turn the main switch off and on. 2. Check if the toner cartridge is installed correctly. 3. Replace the toner cartridge. 4. Check if the harnesses are not damaged. 5. Replace the BCU.

Code: SC687
Description: Memory address command error The BCU does not receive a memory address command from the controller 60 seconds after paper is in the position for registration.
Causes: • Loose connection • Defective controller • Defective BCU
Remedy: 1. Turn the main switch off and on. 2. Check if the controller is firmly connected to the BCU. 3. Replace the controller. 4. Replace the BCU.

Code: SC722
Description: Finisher jogger motor error • The jogger fences of the finisher donot return to home position within a specific time. • The finisher jogger motor does not leave home position within a given time.
Causes: • Defective jogger H.P. sensor • Loose connection • Defective jogger motor
Remedy: 1. Turn the main switch off and on. 2. Check the connection of jogger H.P. sensor and jogger motor connectors 3. Replace the jogger H.P. sensor. 4. Replace the jogger motor.

Code: SC724
Description: Finisher staple hammer motor error Stapling does not finish within 150 ms after the staple hammer motor turns on.
Causes: • Staple jam • Loose connection • Overload caused by stapling too many pages • Defective staple hammer motor
Remedy: 1. Turn the main switch off and on. 2. Check if the staple hammer motor connector is properly connected. 3. Check if the staple jam occurs. 4. Replace the staple hammer motor.

Code: SC725
Description: Finisher stack feed-out motor error The stack feed-out belt H.P. sensor does not activate within a specified time after the stack feed-out motor turns on.
Causes: • Defective stack feedout H.P. sensor • Loose connection • Stack feed-out motor overload • Defective stack feedout motor
Remedy: 1. Turn the main switch off and on. 2. Check if the connectors of the stack feed-out H.P. sensor and motor are properly connected. 3. Replace the stack feed-out H.P. sensor. 4. Replace the stack feed-out motor.