jc penney 981-6247

I have a strange issue. This radio has perfect receive on AM, perfect transmit on AM,lsb, and usb, but no receive at all on usb, or lsb. Radio goes dead quiet on usb and lsb but transmits clearly. All voltages and frequencies are fine around the synthesizer and audio circuits. I also recapped the radio and no change.
Does anyone have any ideas?
More importantly, does anyone have the sams photofacts for this radio, or a ge 3-5825a or hygain 2705, or ANY radio using the cybernet ptmb048aox board?