SERVICE CALL CONDITIONS
B132/B200 4-56 SM
BCU-MUSIC communication error
SC680 D
The main CPU fails to
communicate with the MUSIC
CPU within 5 sec. and three
attempts failed.
• Toner cartridge ID chip harness
disconnected, defective
• Toner cartridge ID chip defective
• Toner cartridge installed incorrectly
• Toner cartridge defective
• UART communication failure; replace the
BCU
Memory address command error
SC687 D
The BCU does not receive a
memory address command from
the controller 120 seconds after
paper is in the position for
registration.
• BCU-Controller connection loose,
defective
• BCU defective
• Controller defective
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