Image formation apparatus having a diagnosing function

Details Image formation apparatus having a diagnosing function Image formation apparatus having a diagnosing function

1983-10-07

1986-02-18

Atkinson, Charles E.

Excavating

371 20, 371 29, G01R 3128

Patent

active

045717257

ABSTRACT:
An image formation apparatus has detection signal generator for generating an analog detection signal, reference signal generator for generating an analog reference signal of a reference level, A/D converter for converting the analog signal into a digital signal, and controller for causing the detection signal to be input to the A/D converter and putting out a desired control signal and for causing the reference signal to be input to the A/D converter and determining the then magnitude of the digital signal to thereby detect abnormality of the A/D converter.

REFERENCES:
patent: 3866171 (1975-02-01), Losbough
patent: 3892955 (1975-07-01), Maejima
patent: 4266292 (1981-05-01), Regan et al.
patent: 4309767 (1982-01-01), Andow et al.
patent: 4310893 (1982-01-01), Loshbough
patent: 4328584 (1982-05-01), Samuelson et al.
Pierce & Stoppenhagen, Fault-Isolation Technique for Optical Scanner, IBM Tech. Disclosure Bulletin, vol. 21, No. 12, May 1979, pp. 4949-4950.

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