PURPOSE: To display a plurality of self-diagnostic results by one alarm means by mounting an abnormality monitor means sending the abnormality data corresponding to the kind of abnormality, a generating means of the corresponding cycle pulse and an alarm means emitting an alarm according to the cycle pulse.
CONSTITUTION: The printing mechanism 1 of a printer is collectively controlled by a printing control means 2 while the printing control means 2 is monitored by an abnormality monitor means 3 and, immediately after a power supply is closed, the abnormality monitor apparatus 3 monitors whether there is abnormality at various places of hardware 2. When abnormality is generated, the abnormality monitor apparatus 3 sends abnormality data 6 showing where is an abnormal place in the hardware 2 to a pulse generator 4 which in turn generates the cycle pulse 7 corresponding to the abnormality data 6 to send the same to a lamp 5 and the lamp 5 lights and goes out repeatedly according to the cycle pulse 7. Therefore, by reading the flashing cycle of the lamp 5, it can be easily known where is abnormal in the hardware 2 and the printing mechanism 1 of the printer and, even in an apparatus equipped with only one lamp, two or more kinds of abnormalities can be displayed.
SUZUKI TETSUYA
SHIRANE HIROAKI
KOYAMA KEIGO
HITACHI VIDEO ENG