DHC-MD555 (serv.man2) - Sony Audio Service Manual (repair manual). Page 3

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CONTROL I

The CONTROL I terminal has been adopted from system stereos DHC-MD555, DHC-MD777, and JMD-7. Connecting by the PC

connection kit PCLK-PX1 and bi-directional remote commander RM-IA10K (J model only) to the CONTROL I terminal facilitates basic
operations of the system stereo, music editing from CD to MD, and title inputs to MDs.

The terminals connecting the optional cassette decks TC-PX100 and TC-SD1 of the above system stereo have different connector shapes,

but adopt the same communication format as CONTROL I.

CONTROL I has no compatibility with the conventionally used AU BUS in terms of both connector shape and communication format.
CONTROL I also has no compatibility with the CONTROL-A1 adopted for the component stereo in terms of connector shape and

communication format.

Although CONTROL I has a similar name with i-LINK using the IEEE1394 terminal which thus may cause them to be confused for one

another, these two have no compatibility.

Communication is carried out by the I2C bus between the microprocessors inside the system stereo. In CONTROL I, a special terminal is

equipped to enable communication by this I2C bus with the microprocessor of an external equipment, and at the same time, a terminal for
turning ON the power of the system stereo from an external equipment has also been added.