Hiya,
The 4035 is only a remote control for the 4030 synchronisers. It won't work with anything else. The 4050 is an autolocator for B and E series machines, it will generate and read SMPTE, it also converts SMPTE to Midi Time Code for syncing recorded trackes with computers running midi enabled software, like Cubase, Cool Edit, Adobe Audition etc. It has a 200bar memory, and multiple memory banks. The data in these memories can also be dumped to tape, and then read back into the machine later. Records as biphase modulated binary. Pretty flash for its time.
4035/4030 also catered for pro VTRs like Sony's BVO, BVH, BVU series, and JVC pro machines. Needed dedicated transport control interfaces.
I have manuals for 4030, 4035, 4050, 4010, 4020. Can assist with DIP switch setting but not much else unfortunately - don't know what else the fault could be cept for maybe a damaged cable. Also make sure your recorder enable button is pressed and light is lit on the 4050...
Cheers Bryan