| 摘要 |
PURPOSE:To decrease troubles in the control of a production process and maintenance service and to reduce the cost of a device by stopping individually and separately providing a fixing heater and making the fixing heater of an AC 200V system serve a double purpose. CONSTITUTION:In a voltage doubler changeover switch SW, both switches have the same constitution and a voltage detection part 18a provided in a voltage doubler changeover switch 18A and a transistor 18b which acts in the case of a 100V system detected by the voltage detection part are provided, then capacitors 19B and 19B' change the DC voltage of a full-wave rectification circuit 17A to voltage doubler when a triode AC switch 18c, etc., is turned on. In the case of the AC 100V system, it is converted into the AC 200V system by changing the voltage to the voltage doubler, so that corresponding DC voltage is obtained and the fixing heater of the identical rated 200V system is made to serve a double purpose. Thus, manpower required for the troubles in the attachment of the fixing heater, the production process and the maintenance service is saved and the cost of the device is reduced. |
