Method for checking abnormal operations of video cassette recorder
US5604647A · kind A · utility
2Cited by
3References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1991 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Jul 8, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/36
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a video cassette recorder (VCR). The present invention decides the mode conversion of the VCR by checking the mode switch signal and displays the mode error data in the abnormal mode conversion, Also, the present invention decides the operation state corresponding to each mode by using the reel pulse and drum pulse and displays the error data if in an abnormal state, thereby informing the users whether the VCR is normal or not.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.