contrast affecting synchronisation?
Posted: Sun May 27, 2007 12:40 am
I've noticed this problem show up now that I have a very bright image which requires me to turn down the contrast. Below about 1/2 setting on the contrast knob, I lose synchronisation on the motor control circuit.
I have measured the incoming synch pulses to the motor control circuit, and they are rock-solid 12V at 61ms wide. They do not vary even slightly when the contrast is adjusted.
Yet, my synchronisation fails based on the setting of contrast. I don't understand this at all, as AFAIK, there is no connection between the contrast of the image, and the synchronisation! I can only surmise some weird transient power fluctuation?
I have measured the incoming synch pulses to the motor control circuit, and they are rock-solid 12V at 61ms wide. They do not vary even slightly when the contrast is adjusted.
Yet, my synchronisation fails based on the setting of contrast. I don't understand this at all, as AFAIK, there is no connection between the contrast of the image, and the synchronisation! I can only surmise some weird transient power fluctuation?