Various problems with A1200

[meega]

The little black switch is a level adjust for the UHF, low or high output strength. Low is usually fine.

As rkauer says, if you get nothing from the composite output it means the fault is not only in the UHF modulator.

[meega]

KThunder wrote:

black switch for ntsc is channel 3 or 4 it is different than that for pal switch is always ch36 i believe

Then that is a difference that I was not aware of, and thank you for pointing that out. :-)

There is also a small potentiometer on the UHF output of my A1200, which allows tuning of the output channel by some amount, and allows you to avoid interference with other channels received by your TV.