Board; Rs-485 Communication Circuit; Function Selection Switches; Ct-221 Board - Sony SSC-DC593 Service Manual

2-3. FC-92 Board

2-3-1. RS-485 Communication Circuit

The RS-485 communication circuit mainly consists of IC701.

2-3-2. Function Selection Switches

An address DIP switch (S706) for RS-485 communication and menu tactile switches (S701 to S705) are
provided.
2-3-3. I/O Circuit
The I/O circuit sends the external I/O signal of CN701, connected with the CT-221 board on the rear
panel, through a floating circuit (around PH703).

2-3-4. CT-221 Board

The CT-221 board mounts a terminal board, connector board, and fuse. (The fuse is mounted only on the
SSC-DC690.)
2-3
SSC-DC593/DC593P/DC598P (E)