VCR head cleaning system that automatically detects head cloggin

Details VCR head cleaning system that automatically detects head cloggin VCR head cleaning system that automatically detects head cloggin

1996-01-30

1997-12-02

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

360 31, 360128, G11B 1518, G11B 541

Patent

active

056942630

ABSTRACT:
An ATF error signal is formed from a reproduction RF signal and supplied to an ATF discriminating unit 4 through an A/D converter by an ATF error arithmetic operation unit 1. The presence or absence of an ATF component is discriminated and supplied to a clog discrimination processing unit 5 by the ATF discriminating unit 4. The ATF discrimination processing unit 5 determines that a head clog has occurred in the case where the ATF component exists and the RF signal which is supplied from an RF discriminating unit 9 doesn't exist. A head cleaning is executed by controlling a loading motor 16 by a motor driver 14 on the basis of a cleaning process control 11 and making a head cleaning mechanism 17 operative.

REFERENCES:
patent: 4827361 (1989-05-01), Yoshioka
patent: 4970612 (1990-11-01), Renders et al.
patent: 5193033 (1993-03-01), Shimoi et al.
patent: 5420729 (1995-05-01), Lee et al.

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