| 摘要 |
When a PWB is returned to the unit producing factory, the history of the past failure information can be grasped with reliability. An information processing unit with a failure information management function under a host unit to send/receive information to/from the host unit and having a plurality of PWBs, includes: the PWBs each provided with rewritable ROM; wherein at least one of the PWBs has a CPU for controlling sending/receiving of information to/from the host unit and input/output of information of the rewritable ROM; the rewritable ROM stores the identification code and the failure information of the PWB.
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