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JPS649597A - Electronic equipment having theft preventing device with line mode - Google Patents

Electronic equipment having theft preventing device with line mode

Info

Publication number
JPS649597A
JPS649597A JP16477987A JP16477987A JPS649597A JP S649597 A JPS649597 A JP S649597A JP 16477987 A JP16477987 A JP 16477987A JP 16477987 A JP16477987 A JP 16477987A JP S649597 A JPS649597 A JP S649597A
Authority
JP
Japan
Prior art keywords
line mode
theft preventing
count
timer
mute
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
JP16477987A
Other languages
Japanese (ja)
Inventor
Kengo Ozaki
Nagatoshi Uehara
Tomosue Hashimoto
Noritsugu Anzai
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.)
Faurecia Clarion Electronics Co Ltd
Original Assignee
Clarion 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 Clarion Co Ltd filed Critical Clarion Co Ltd
Priority to JP16477987A priority Critical patent/JPS649597A/en
Publication of JPS649597A publication Critical patent/JPS649597A/en
Pending legal-status Critical Current

Links

Landscapes

  • Burglar Alarm Systems (AREA)

Abstract

PURPOSE:To predict the end of line mode without new provision of a line mode signal generating circuit by operating intermittently a mute means so as to interrupt a voice output when prescribed elapsed time is detected by a count of a timer means. CONSTITUTION:When a line mode is selected by a line mode selector 5, a CPU 1 releases the theft preventing mechanism in response to the line mode selection signal to start the count by a timer 6. Till a prescribed time elapses, normal operation is applied and when the elapsed time is detected by the count of the timer 6, for example a mute signal of 2sec period is given to a mute circuit 3 to interrupt thrice the audio output of an audio circuit 2 thereby predicting the end of line mode. Then the audio output is muted and the theft preventing mode is selected. Thus, the end of the Kerr line mode is predicated without addition of a new special device.
JP16477987A 1987-07-01 1987-07-01 Electronic equipment having theft preventing device with line mode Pending JPS649597A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16477987A JPS649597A (en) 1987-07-01 1987-07-01 Electronic equipment having theft preventing device with line mode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16477987A JPS649597A (en) 1987-07-01 1987-07-01 Electronic equipment having theft preventing device with line mode

Publications (1)

Publication Number Publication Date
JPS649597A true JPS649597A (en) 1989-01-12

Family

ID=15799783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16477987A Pending JPS649597A (en) 1987-07-01 1987-07-01 Electronic equipment having theft preventing device with line mode

Country Status (1)

Country Link
JP (1) JPS649597A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0336688A (en) * 1989-07-03 1991-02-18 Clarion Co Ltd Theft preventing device for on-vehicle electronic apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0336688A (en) * 1989-07-03 1991-02-18 Clarion Co Ltd Theft preventing device for on-vehicle electronic apparatus

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