Anyone know what it means when the voltage regulator outputs 5V when breadboarded, but NOT when installed into the power modulator? Needless to say, my nes won’t power on. I already did a full cap replacement on power modulator and nes mobo, same result.
I do have Tim Worthington’s NESRGB board installed and the console was working well for weeks. Then all of a sudden, the modulator has become finicky. Tested everything, pin 1 of the regulator receives 12V, pin 3 outputs nothing. I know it’s not the regulators as I’ve tried multiple, and have also pulled out and tested hooked up to a 9V battery separately, and they output fine 5V there!
There’s two NPN transistors in the power regulator labeled C1740, that I’ve pulled to test. Although I think those are related to the stock A/V outs. Those shouldn’t have to be installed for the regulator to output 5V should they? I think they’re bad: black probe on middle pin and red probe on pin 1, I get 0. Move red probe to pin 3, then I get 0.68V-ish.
I do have Tim Worthington’s NESRGB board installed and the console was working well for weeks. Then all of a sudden, the modulator has become finicky. Tested everything, pin 1 of the regulator receives 12V, pin 3 outputs nothing. I know it’s not the regulators as I’ve tried multiple, and have also pulled out and tested hooked up to a 9V battery separately, and they output fine 5V there!
There’s two NPN transistors in the power regulator labeled C1740, that I’ve pulled to test. Although I think those are related to the stock A/V outs. Those shouldn’t have to be installed for the regulator to output 5V should they? I think they’re bad: black probe on middle pin and red probe on pin 1, I get 0. Move red probe to pin 3, then I get 0.68V-ish.