Trutech TV support is at www.alcosupport.com - read the manual guys.
However, the Daewoo codes did NOT work on my model PLV1615T bought at Target. So am waiting for response from their support website. Someone posted five digit codes also and my Comcast remote unit only uses 4 digit codes.
Try a direct email at the alco website to tech support to wake them up - they should explain which manufacturer codes they use for the remote in the manual, but they don't. Or, complain to Target, who sells them, like I will.