CD701: Mechanical controller flash ROM writing errorCD702: Mechanical controller flash ROM device errorCD703: FW download communication fault
Rank
C
Trouble detection condition
CD701: A mechanical controller flash ROM writing sequence is interrupted in its mid-operation due to, for example, power being shut off.
CD702: An erase error or other device fault occurs during mechanical controller flash ROM writing.
CD703:Irregular data is received during FW downloading.Places are changed in the order of write completion pulses.A write completion pulse is received for a memory for which binary writing is not permitted.Final checksum mismatch in FW downloadTwo-minute timeout (no response from CTL, the number of transfer data items less than the specified)
Trouble isolation
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Relevant electrical parts
CPU board (CPUB)Base board (BASEB)
Procedure
Turn OFF the main power switch and unplug the power cord. Connect the power cord after 15 sec. or more, and turn ON the main power switch.
Check CPUB for proper installation and correct as necessary.
