There is described a printer with a mechanism for detecting abnormality in the printing mechanism such as a type font wheel. The detection at the start of power supply is effected with a criterion different from that in the course of printing operation, in order to simplify the operation for the initial errors encountered at the start of power supply.
This application is a continuation of application Ser. No. 07/622,277 filed Dec. 6, 1990, which is a continuation of application Ser. No. 07/436,131 filed Nov. 14, 1989, which is a continuation of application Ser. No. 07/165,397 filed Feb. 29, 1988, which is a continuation of application Ser. No. 07/085,246 filed Aug. 11, 1987, which is a continuation application of Ser. No. 07/791,398 filed Oct. 25, 1985, all now abandoned.
Priority Data
Dec 11, 1984 [JP] 59-236822 Dec 11, 1984 [JP] 59-236823
A printing apparatus which shuts off the power supply to the apparatus, if a state in which the power supply to the apparatus is meaningless continues for a predetermined period, to prevent wasteful electricity consumption. When a LBP has an abnormality, an error processor detects the abnormality, executes a predetermined processing such as notification of the occurrence of error, and outputs error information to a power controller. The power controller determines whether or not the abnormal state has continued for a predetermined period. If the power controller determines the continuation of the abnormality for the predetermined period, it outputs a power-off instruction to a power. The power shuts off the power supply to the respective elements of the LBP.
