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CD701, CD702, CD703 (bizhub 950i/850i)
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Contents
| Trouble type | – CD701: Mechanical controller flash ROM writing error – CD702: Mechanical controller flash ROM device error – CD703: 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 download – Two-minute timeout (no response from CTL, the number of transfer data items less than the specified) | |
| Trouble isolation | – |
| 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.
- Rewrite the firmware.
- Replace CPUB.
- Replace BASEB.