JPS57123073A - Fault detecting device of thermal head - Google Patents

Fault detecting device of thermal head

Info

Publication number
JPS57123073A
JPS57123073A JP56008681A JP868181A JPS57123073A JP S57123073 A JPS57123073 A JP S57123073A JP 56008681 A JP56008681 A JP 56008681A JP 868181 A JP868181 A JP 868181A JP S57123073 A JPS57123073 A JP S57123073A
Authority
JP
Japan
Prior art keywords
voltage
thermal head
resistor
voltage drop
cpu10
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
JP56008681A
Other languages
Japanese (ja)
Inventor
Yoshinobu Kitada
Takao Ishida
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.)
Omron Corp
Original Assignee
Tateisi Electronics Co
Omron Tateisi Electronics Co
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 Tateisi Electronics Co, Omron Tateisi Electronics Co filed Critical Tateisi Electronics Co
Priority to JP56008681A priority Critical patent/JPS57123073A/en
Publication of JPS57123073A publication Critical patent/JPS57123073A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
    • B41J2/35—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads providing current or voltage to the thermal head
    • B41J2/355—Control circuits for heating-element selection

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To detect fault without decreasing the working ratio in a thermal head comprising a plurality of heating elements in a row, by a method wherein voltage value depending on voltage drop produced on a resistor is compared with reference voltage while a switch circuit is opened. CONSTITUTION:During inspection, a switch circuit 5 is opened according to command of CPU10 and voltage of + electrode of DC power source 3 is applied to a thermal head group 1 through a resistor 4. Transistors 21...2n are turned ON in sequence and the address information is detected. In a comparator 8, reference voltage produced by voltage division of the power source 3 at resistors 6 and 7 is compared with voltage depending on voltage drop value caused by current flowing through a resistor to the head 1. If any element 1 is broken, the voltage drop value decreases. This output enters through an output control unit 9 into the CPU10 and fault is indicated in an indicator 13 based upon the address information.
JP56008681A 1981-01-23 1981-01-23 Fault detecting device of thermal head Pending JPS57123073A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56008681A JPS57123073A (en) 1981-01-23 1981-01-23 Fault detecting device of thermal head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56008681A JPS57123073A (en) 1981-01-23 1981-01-23 Fault detecting device of thermal head

Publications (1)

Publication Number Publication Date
JPS57123073A true JPS57123073A (en) 1982-07-31

Family

ID=11699660

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56008681A Pending JPS57123073A (en) 1981-01-23 1981-01-23 Fault detecting device of thermal head

Country Status (1)

Country Link
JP (1) JPS57123073A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59184644U (en) * 1983-05-26 1984-12-08 富士通株式会社 printing device
JPS6242861A (en) * 1985-08-21 1987-02-24 Tokyo Electric Co Ltd Apparatus for detecting trouble of thermal printer
JPS62175932U (en) * 1986-04-28 1987-11-09
US5951175A (en) * 1998-03-05 1999-09-14 Nec Corporation Thermal printer
WO2000051819A1 (en) * 1999-03-02 2000-09-08 Ricoh Company, Ltd. Image recording body and image forming device using the image recording body

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59184644U (en) * 1983-05-26 1984-12-08 富士通株式会社 printing device
JPH0312529Y2 (en) * 1983-05-26 1991-03-25
JPS6242861A (en) * 1985-08-21 1987-02-24 Tokyo Electric Co Ltd Apparatus for detecting trouble of thermal printer
JPS62175932U (en) * 1986-04-28 1987-11-09
US5951175A (en) * 1998-03-05 1999-09-14 Nec Corporation Thermal printer
WO2000051819A1 (en) * 1999-03-02 2000-09-08 Ricoh Company, Ltd. Image recording body and image forming device using the image recording body
US6589708B1 (en) 1999-03-02 2003-07-08 Ricoh Company, Ltd. Image recording body and image forming device using the image recording body
US6961074B2 (en) 1999-03-02 2005-11-01 Ricoh Company, Ltd. Image recording body and image forming apparatus by use of the same
US7061513B2 (en) 1999-03-02 2006-06-13 Ricoh Company, Ltd. Image recording body and image forming apparatus by use of the same

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