Optical disc apparatus and disc apparatus

A disc apparatus, comprising:

• a recording and/or reproduction part, which carries out at least one of recording and reproduction of data on a disc;
• a rotation driving part, which rotates the disc;
• a driving part, which shifts the recording or reproduction part in radial direction of the disc;
• a driving circuit, which drives at least either the rotation driving part or the driving part;
• a servo processor, which controls the driving circuit;
• and
• a conversion circuit, which changes the signal voltage of the servo processor and transmits the signal voltage to the driving circuit.

A power diagnosis method of a connection device, wherein:

• a cable for acquiring power from an electronic device and for inputting/outputting a signal connects the electronic device and the connection device;
• the connection device is test operated by a control program that is executed in the electronic device;
• and
• the power consumption of the connection device is evaluated by the test operation.

A connection device to which power is supplied from the outside and which allows for a test operation by an instruction from the outside, wherein:

• the conditions for allowing the operation by power that can be supplied from the outside are determined from the outside by means of a test operation;
• the data that corresponds to the conditions for allowing the operation that have been inputted from the outside is stored in a memory part;
• and
• a control part controls respective parts on the basis of the data stored in the memory part.

An optical disc apparatus comprising:

• a rotation driving part, which rotates an optical disc;
• a recording and/or reproduction part, which carries out at least either recording or reproduction of data by irradiating the optical disc with light;
• a guide part, which supports the recording or reproduction part so that the recording or reproduction part can be shifted in a predetermined range in the directions towards and away from the rotation driving part;
• a feed part, which shifts the recording or reproduction part along the guide part;
• a control part, which controls the entirety and a memory part, wherein power is supplied from the outside and it is possible to carry out a test operation by means of an instruction from the outside, wherein:
• each part such as the rotation driving part, the recording or reproduction part, or the feed part is operated in the test operation, and thereby the conditions for allowing the operation are determined from the outside by means of the power that can be supplied from the outside;
• the data that corresponds to the conditions for allowing the operation and that has been inputted from the outside is stored in the memory part;
• and
• the control part controls each part on the basis of the data stored in the memory part.