Abstract: An electronic device capable of decreasing power consumption is provided. A multiple function apparatus including a power line communication function has a plurality of units such as a PLC board, a main control board, a printer control board, a printer, and a FAX control board. The multiple function apparatus also includes a device power supply unit for supplying power to the units independently. A power supply control unit of the PLC board outputs a power supply control signal in response to a state change of the multiple function apparatus and controls power supply to each unit.

Abstract: An electronic device capable of decreasing power consumption is provided. A multiple function apparatus including a power line communication function has a plurality of units such as a PLC board, a main control board, a printer control board, a printer, and a FAX control board. The multiple function apparatus also includes a device power supply unit for supplying power to the units independently. A power supply control unit of the PLC board outputs a power supply control signal in response to a state change of the multiple function apparatus and controls power supply to each unit.

Abstract: The present invention relates to a control apparatus for managing communications between a plurality of electric appliances connected to a household power line network. The apparatus transmits a plurality of types of modulation method control signals to each of the plurality of electric appliances, each type of control signal utilizing a different modulation method. When receiving a response from each electric appliance, the apparatus detects to which type of modulation method control signal the response was made and judges the type of the modulation method that is utilized in each electric appliance based on the detection.

Abstract: The present invention relates to a control apparatus for managing communications between a plurality of electric appliances connected to a household power line network. The apparatus transmits a plurality of types of modulation method control signals to each of the plurality of electric appliances, each type of control signal utilizing a different modulation method. When receiving a response from each electric appliance, the apparatus detects to which type of modulation method control signal the response was made and judges the type of the modulation method that is utilized in each electric appliance based on the detection.

Abstract: Provided is a process for preparing a diaryl or a mixture of diaryls represented by any or a combination of the following formulae (II), (III) and (V), characterized in that a diaryliodonium salt represented by the following formula (I) is reacted in a solvent in the presence of a transition metal catalyst and a reducing metal at a temperature in the range of room temperature to 100.degree. C.:[Ar.sub.1 -I.sup..sym. -Ar.sub.2 ]X.sup..crclbar. (I)Ar.sub.1 -Ar.sub.1 (II)Ar.sub.1 -Ar.sub.2 (III)Ar.sub.2 -Ar.sub.2 (IV)wherein Ar.sub.1 and Ar.sub.2, which may be alike or different, are each an aryl group which may have a substituent group or groups and X.sup..crclbar. is a counter ion which is inert to said reaction.