I need to connect my old projector Epson EMP TW-700 to my laptop to figure out if there is an error message why it does not show images. I thought RS232 would do the job because it is possible to power on the projector via RS232 and it returns some diagnostic info during the process.
I need to connect the projector via RS232, the wiring is like this image
I wanted to connect it to RS232-to-USB that I had at home, that is a FTDI232 like this one in the image
The chip itself seems to have a DSR pin, but I do not find a pinhole or pin for it. Does it mean I cannot use this RS232-to-USB for my purpose? or maybe the DSR is not necessary? or it is just renamed to something else on the circuitboard for some funny reason?
Please help on how to connect the projector to this RS232-to-USB because as of now I do not get anything on the terminal when I power on the projector and I suspect this missing pin may be the reason.