DHC-MD555 (serv.man2) - Sony Audio Service Manual (repair manual). Page 4

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The CONTROL I terminal uses a MINI DIN 6-pin connector.
This connector is used for DOS/V PC keyboards and PS/2 mouse, but it has no compatibility with the communication format.
However, taking into account connection to this connector by mistake, power and GND pin positions are made the same to prevent

incorrect operations.

Table 1-1. Function of CONTROL I Terminal

Serial data input/output terminal
No Connect (OPEN)
Grounding terminal
+5V terminal
Serial clock input/output
Power on signal input terminal
Grounding terminal

No

I/O

Terminal Name

Function

1
2
3
4
5
6
7

I/O

–
–
–

I/O

I

–

SDA
NC
GND
VDD
SCL
POWER ON
FRAME GND