| 摘要 |
PURPOSE:To reduce the number of relaying base plates so as to reduce the time required for making wiring works shorter, by providing holes in the axial direction of a rotary drum so that a printed wiring can be checked through the holes. CONSTITUTION:When the magnetic head coil 56 of an upper drum and the rotary coil 18 of a rotary transformer are connected with each other, opening sections 58 are provided in a rotary drum 60 and soldering is performed to terminals of a printed wiring on relaying base plates 54 through the openings 58. When the assembling and wiring works of the rotary drum 60 are carried out in such way, the 1st and 2nd relaying base plates become unnecessary. |
