I have an older Marantz SR5500 and I’ve been trying to set up the RS-232 connection to my computer and I just can’t seem to get it work. Anyone have any success with this, or can help? The computer I’m using is a P-IV running Win XP home (SP3), using the standard serial port assigned to COM1 connected to the receiver using a straight through DB9 RS-232 serial cable. I’ve tried a number of different terminal/comm programs but prefer using my Eltima Advanced Serial Port Terminal 4.1. I have the specified protocols set, 9600,N,8,1, no handshake, and using the command set for my receiver. I’ve tried everything I can think of and nothing happens. The commands go out and that’s as far as it goes, I get no return signal or control / status of functions. I have the service manual, no help there. I also managed to get a copy of the Hardware Software Interface (HSI), RS232C controller interface SRx500 Specification. Not much help there either.