JPS5688148A - Operation checking method of recorder - Google Patents

Operation checking method of recorder

Info

Publication number
JPS5688148A
JPS5688148A JP16554979A JP16554979A JPS5688148A JP S5688148 A JPS5688148 A JP S5688148A JP 16554979 A JP16554979 A JP 16554979A JP 16554979 A JP16554979 A JP 16554979A JP S5688148 A JPS5688148 A JP S5688148A
Authority
JP
Japan
Prior art keywords
circuit
output
voltage
detecting
input signals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP16554979A
Other languages
Japanese (ja)
Inventor
Takashi Ezaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP16554979A priority Critical patent/JPS5688148A/en
Publication of JPS5688148A publication Critical patent/JPS5688148A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To discover the abnormality of a driver circuit before recording by transmitting a detection signal to the driver circuit of a recording head and detecting the change in the current flowing in this driver circuit and the voltage change thereof. CONSTITUTION:The output signal of a voltage detecting circuit 5 detecting the voltage across a resistance R and the output signal of an OR circuit 6 inputted with the signals S'1, S'2, S'3 of input signals S1, S2, S3 are inputted to the input side of an AND circuit 4, and the output side of the AND circuit 4 is connected to the set input terminal of an FF circuit 7. If the input signals of respective switching circuits SW1-SW3 are made L while not in recording, the input signals S'1-S'3 of the OR circuit 6 all go to H, and if there is a trouble of ON in any of the switching circuits SW1-SW3, H is outputted from the voltage detecting circuit as well, and the output of the AND circuit 4 goes H, thereby setting the FF7. An LED etc. are then lighted by the output Q of the FF7 and the trouble is thereby displayed.
JP16554979A 1979-12-21 1979-12-21 Operation checking method of recorder Pending JPS5688148A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16554979A JPS5688148A (en) 1979-12-21 1979-12-21 Operation checking method of recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16554979A JPS5688148A (en) 1979-12-21 1979-12-21 Operation checking method of recorder

Publications (1)

Publication Number Publication Date
JPS5688148A true JPS5688148A (en) 1981-07-17

Family

ID=15814480

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16554979A Pending JPS5688148A (en) 1979-12-21 1979-12-21 Operation checking method of recorder

Country Status (1)

Country Link
JP (1) JPS5688148A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59109381A (en) * 1982-12-14 1984-06-25 Citizen Watch Co Ltd Detecting circuit of abnormalities of impact printer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59109381A (en) * 1982-12-14 1984-06-25 Citizen Watch Co Ltd Detecting circuit of abnormalities of impact printer
JPH0424236B2 (en) * 1982-12-14 1992-04-24 Citizen Watch Co Ltd

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