KR920013264A - VC automatic head washing method - Google Patents

VC automatic head washing method Download PDF

Info

Publication number
KR920013264A
KR920013264A KR1019900022466A KR900022466A KR920013264A KR 920013264 A KR920013264 A KR 920013264A KR 1019900022466 A KR1019900022466 A KR 1019900022466A KR 900022466 A KR900022466 A KR 900022466A KR 920013264 A KR920013264 A KR 920013264A
Authority
KR
South Korea
Prior art keywords
counter
head
predetermined number
count value
value
Prior art date
Application number
KR1019900022466A
Other languages
Korean (ko)
Inventor
박만식
Original Assignee
이헌조
주식회사 금성사
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 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR1019900022466A priority Critical patent/KR920013264A/en
Priority to GB9124749A priority patent/GB2250627B/en
Priority to DE4138474A priority patent/DE4138474C2/en
Priority to JP3332790A priority patent/JPH0777013B2/en
Publication of KR920013264A publication Critical patent/KR920013264A/en
Priority to US08/291,726 priority patent/US5420729A/en

Links

Abstract

내용 없음No content

Description

브이씨알 자동헤드 세척방법V-Cell automatic head cleaning method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명 브이씨알의 자동헤드세척방법을 실현하기 위한 블럭도, 제2도는 본 발명 브이씨알의 자동헤드 세척방법의 신호 흐름도, 제3도는 (가)는 헤드스위칭신호의 파형도이고, (나)는 엔벨로프의 예시 파형도.1 is a block diagram for realizing the automatic head washing method of the VRC of the present invention, FIG. 2 is a signal flow chart of the automatic head cleaning method of the VLC of the present invention, and FIG. 3 is a waveform diagram of the head switching signal. (B) is an exemplary waveform diagram of an envelope.

Claims (1)

마이콤(30)이 영상엔벨로프 검출부(20)를 통해 A, B채널의 영상재생신호에 대한 엔벨로프를 헤드스위칭신호의 반주기씩 누적하면서 받아들인 후, 그 헤드스위칭신호의 1주기마다 상기 A, B채널의 엔벨로프를 각각 기준치(Verf)와 비교하여 크면 일단, 채터링카운터(CCT)의 카운터 값을 1증가시키고, 그 채터링카운터(CCT)의 카운트 값이 소정횟수(n)를 상회할때 그를 클리어시키는 동시에 헤드클리어카운터(HCT)의 카운트 값이 소정횟수(x)보다 작으면 모터구동부(40)를 통해 로딩모터(M1)를 구동시킴으로써 헤드클리어(51)가 드럼(10)에 밀착되게 하며, 상기 헤드클리어카운터(HCT)의 카운트 값이 소정횟수(x)이상이면 카세트테이프를 이젝트시키는 것을 특징으로 하는 브이씨알의 자동헤드세척방법.The microcomputer 30 receives the envelopes of the video reproduction signals of the A and B channels through the video envelope detector 20 while accumulating half the periods of the head switching signals, and the A and B channels every one period of the head switching signals. When the envelope of each is larger than the reference value Verf, the counter value of the chattering counter (CCT) is increased by 1, and the counter value of the chattering counter (CCT) is cleared when the count value exceeds the predetermined number (n). At the same time, if the count value of the head clear counter (HCT) is less than the predetermined number (x), the head clear 51 is in close contact with the drum 10 by driving the loading motor M1 through the motor driving unit 40, And a cassette tape is ejected when the count value of the head clear counter (HCT) is greater than or equal to a predetermined number (x). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019900022466A 1990-11-22 1990-12-29 VC automatic head washing method KR920013264A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1019900022466A KR920013264A (en) 1990-12-29 1990-12-29 VC automatic head washing method
GB9124749A GB2250627B (en) 1990-11-22 1991-11-21 Head cleaner for VCR and automatic head cleaning apparatus and method
DE4138474A DE4138474C2 (en) 1990-11-22 1991-11-22 Head cleaning device for a video cassette tape recorder and an automatic head cleaning device and a method therefor
JP3332790A JPH0777013B2 (en) 1990-11-22 1991-11-22 VCR head cleaner and automatic head cleaning method and apparatus
US08/291,726 US5420729A (en) 1990-11-22 1994-08-16 Head cleaner for VCR and automatic head cleaning apparatus and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019900022466A KR920013264A (en) 1990-12-29 1990-12-29 VC automatic head washing method

Publications (1)

Publication Number Publication Date
KR920013264A true KR920013264A (en) 1992-07-28

Family

ID=67538228

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019900022466A KR920013264A (en) 1990-11-22 1990-12-29 VC automatic head washing method

Country Status (1)

Country Link
KR (1) KR920013264A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100226355B1 (en) * 1996-11-29 1999-10-15 전주범 Head pollution detecting circuit of vcr

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100226355B1 (en) * 1996-11-29 1999-10-15 전주범 Head pollution detecting circuit of vcr

Similar Documents

Publication Publication Date Title
CA2202738A1 (en) Apparatus for detecting and responding to series arcs in ac electrical systems
ATE120875T1 (en) IMAGE AND/OR SOUND SIGNAL RECEIVING AND RECORDING ARRANGEMENT.
JPS57186239A (en) Disc reproducing device
KR920009192A (en) Anti-shake control method of camcorder
KR920013264A (en) VC automatic head washing method
US4017895A (en) Method of detecting defects in read out signals, and apparatus for implementing the same
KR900018957A (en) Information signal recording device
KR910020657A (en) Automatic track locking status check circuit
KR960025554A (en) NTSC / PAL-M discrimination circuit and broadcasting method discrimination method
JPS55153182A (en) Tape recorder
JPS56124177A (en) Tape counter device
JPS57193873A (en) Detection for picture position on screen
KR980004561A (en) How to determine the tape-speed playback mode of a video cassette recorder
KR870011593A (en) Drive Mode Selector for Video Tapes
JPS56105380A (en) Electronic counter device of tape recorder
SU917209A1 (en) Device for control of magnetic tape reversing
KR920005133A (en) Forced recording mode switching and automatic ejection method by detecting remaining recording tape
JPS55135346A (en) Signal detection system
SU1223288A1 (en) Device for reproducing digital information from magnetic record medium
KR900000884A (en) Control signal duty ratio determination method of video cassette recorder
JPS5678281A (en) Signal processing circuit
KR930014512A (en) Hi-Fi normal automatic switching device of Hi-Fi VCR
JPS57100639A (en) Automatic switching device for playback speed of vtr
KR920020449A (en) How to record tape silently on a logic recording / playback deck
KR930015878A (en) NTSC / PAL type discrimination device

Legal Events

Date Code Title Description
WITN Withdrawal due to no request for examination