SONY 9-pin

The Sony 9-pin protocol is based on the EIA RS-422-A signal standard. The data rate is usually 38.4 kbps.

Cable Pinout:

Pin Master Slave
1 Ground Ground
2 Receive A Transmit A
3 Transmit B Receive B
4 Transmit Common Receive Common
5 Spare Spare
6 Receive Common Transmit Common
7 Receive B Transmit B
8 Transmit A Receive A
9 Ground Ground

Please see the very good 'Sony 9-Pin' Page of Rick and Myriam's Big World of Computers: Sony 9-Pin Remote Protocol

or see the 'Technik-Tipps: Sony 9-Pin Remote Protocol