Code :

Code: 672
Description: Controller-to-operation panel communication error at startup
Causes: • Controller stalled • Controller board installed incorrectly • Controller board defective • Operation panel connector loose or defective • The controller is not completely shutdown when you turn the main switch off.

Code: 680
Description: BCU/ MUSIC communication 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

Code: 685
Description: SBU-IPU communication error
• During data transfer, a checksum error occurs. • During any operation except initialization, the SBU sends a hardware-reset acknowledgement to the IPU.
Causes: • Loose connection between SBU and IPU • SBU board defective • IPU board defective • External noise

Code: 686
Description: BCU-IPU communication error
• After the machine is powered on or recovering from the power save mode, timeout occurs during BCU communication. • The break signal is received after the communication is normally established with the BCU. • Timeout occurs while the communication with the BCU is retried after a communication error
Causes: • Board connector between BCU and controller loose • Board connector between controller and motherboard loose • Board connector between motherboard and IPU loose • BCU board defective • IPU board defective • Controller board defective • Motherboard defective