Patent ID: 7599608

Claim:
An information recording apparatus comprising: a plurality of signal processing units connected in series, wherein each signal processing unit comprises one or more mode-setting registers, receives an input signal, and processes the input signal in accordance with a value of the mode-setting registers to generate an output signal, a first signal processing unit receives the output signal generated by a second signal processing unit, information recording units, the information recording units recording on a recording medium the output signal generated by the first signal processing unit; and a microcomputer, the microcomputer judging if the signal processing units are subject to recording abnormality or already undergoing the recording abnormality, and the microcomputer further recording information relating to the recording abnormality on an abnormality information recording medium together with actual time information in response to the judgment for the recording abnormality, the microcomputer has internal registers and sets first mode setting signals with respect to the mode-setting registers of the signal processing units while retaining second mode setting signals identical to the first mode setting signals in the internal registers, and the microcomputer further judges if the signal processing units are subject to the recording abnormality or already undergoing the recording abnormality by comparing the first and second mode setting signals and records the information relating to the recording abnormality on the abnormality information recording medium together with the actual time information when the recording abnormality is judged to occur.