Hi, I had the same problem you described regarding the Remote Control for a Trutech DVD/VCR Model # DRT-S810. After trying several "universal" R/Cs I ended ordering the original one from Daewoo Electronics America @ 1-888-6TRUTECH. I've just got it today and works perfect. I paid for it $6.00 + S & H.
I didn't ask, but I bet they have the User Manual as well.
Good luck