Here's the CP2103 schematic:
The J2 connector plugs into the JP7 connector of my clone:
One thing to note here is that the 3.3v output from the CP2103 board is not connected to the arduino clone, I only use a 5 pin header on the CP2103 board.
There could very well be an error on the CP2103 board. There also could be an error in my building of the CP2103 board, as it is my first attempt at SMD assembly. I had a solder stencil made for the board, applied solder paste, placed components, and re-flow with a clothes iron. I have examined the solder connections and they appear fine, but I don't have a good magnification device. I have a cheap helper hands thing with a magnifying glass on it. I also don't have meter probes for this kind of work, so I can't check for continuity.
95% sure the clone board is up to par. I can use my UNO to program it, and it just works.
Thanks for any help,
Randy