| 摘要 |
<p>PURPOSE:To move a cartridge even when a cartridge is fixed and to improve maintainability by providing a break releasing switch in a break solenoid drive circuit. CONSTITUTION:When a break releasing switch 11 of a break solenoid drive circuit 10' is opened, the output of an OR gate becomes '1' regardless of the logic of a signal from a CPU 7, a transistor turns ON and the base potential of a transistor 14 becomes low enough for the transistor 14 to turn ON. When the transistor 14 turns ON, a current to drive a break solenoid flows, a break is released, when the movement of a maintenance mechanism is needed, the break releasing switch 11 is operated and the break can be released at any time.</p> |
