Hi,
I have come into the problem may be this is the cause of Tv Tuner Malfunctioning that when i apply +5v to tuner for band selection(BH, BL, BU and BM pins) then the voltage drops to 4.1v , i think that's the reason i am not getting IF signal out from Tuner, My tuner is TDQ-37-5v but i dont know how much current it requires, can't get it's datasheet, 7805 can deliver maximun 1A. Does any one know the current rating for tv tuners (Is it standard ? mine is analog not digital)
Also can anybody confirm that 4.1v instead of 5v is ok (in case of analog tv tuner) for band selection pins , i don't know if these are TTL or CMOS, if it's TTL then 4.1v should be ok but in my case i ca't get any output from tuner also for AGC(4v recommended) i have attached potentiometer for adjustment but no luck.
A prompt reply would be helpful
Masood