| 摘要 |
A magnetic reproducing apparatus (1) has an MR head (2) for each recording surface of a recording medium (3). The apparatus is capable of supplying a proper sense current to each MR head (2) even if a control board of the apparatus is replaced, thereby improving the durability and reliability of the MR heads (2). Each MR head (2) reads information from a recording surface of a recording medium (3) in response to a sense current supplied to the MR head (2). The read information is decoded through a decoder (29). Whenever a power source of the apparatus is turned on, a resistance value of a magnetoresistive element of each MR head (2) is measured. The measured resistance value is converted into a proper sense current value with the use of a conversion table (26). Based on the proper sense current value, a sense current is supplied to the MR head (2) until the power source of the apparatus is turned off. As a result, the sense current supplied to the MR head (2) is correct even if the control board is replaced. <IMAGE> |
