Thanks a lot for helping, It would be a success if my problem were the setting of the IF. Although tuning to get the difference is not critical, I've already tried adding and subtracting, but no success. I tried the setting with an analog tuner and different resonance, glimmer of hope and promise are dazzling no mater how far is the tuning, but these digital tuners are either yes or no! 
I think it's the I2C bus not carrying out commands or distorted. I managed to trace the I2C bus to the tuner it's shiny and new or nice and clean. There's no IF signal coming out of the tuner, or may be it's too weak to come out of the SAW filter. I don't have datasheet for it and the TV monitor schematics I get suggested have different tuners. So, hopefully getting IF signal will solve the problem.