I finally sucessfully by pass my lamp check circuit. By connecting the Lamp_Lit signal to Ground. I connect Lamp_Lit and Lamp_Enable at the first time, I couldn't verify it works since it also has a light sensor to synchonise the color wheel; I thought it was my DIY halogen lamp was not bright enough to activate the light sensor. Last night, I tried to ground the Lamp_lit, and it works without the original lamp; I use a $1.25 50W halogen spot light, with a 240v - 12v tranformer. The image isn't as bright as the original lamp, it is only 50w halogen; but the DMD and color wheel works perfectly, it is now a fully functional XGA DLP projector without using the original lamp, now I don't have to worry about the Lamp life. The next step is to build up my LED light engine; Today I received my 2.8A 5V SSC P7 LED driver board, i am still waiting for my SSC P7 LED (DealExtreme has delay my order as they were out of supply). And I am planning to use the PSP power adaptor (5V 2A) to work with the light engine combination.
Changed Power supply to be PC PSU, gain more current, around 3A, more light output from the P7. But the down side is that the PC PSU produces noise for the TV RCA signal, the output picture of the projector has annoying strike and noise.
I bought a Lux meter from ebay to enhance my experiment project. I am now having 7 lux output of the 1.5m*1.125m pictutre, that is 7*1.5*1.125 = 11.81 Lumen.