Hello. A friend gave me an electronic organ Series 251S - 252S . I have the schematic diagram 1st edition. It's not working : The oscillator ICa1 SN 29730 (board PA-633) doesn't work, but probably because the voltage regulator SN72723N gives 0V on pins 2 3 4 10. I don't know the voltage to put in pin3 of oscillator : I have try to put a 3,3 kohm resistor between 12V and the potentiometre of 100 ohm but the voltage stays too low (0.9V). Could you help me because I don't find the data shets of theses CI, or tell me where boy a SN 72723 or a board PA-633 (6729*1124661).
I have tried to cut out the output of the regulator and put 5V (with USB Power) at the Oscillator, without result. I don't find an equivalent IC from the SN 29730 with same pins. Thanks to help me !
I have tried to cut out the output of the regulator and put 5V (with USB Power) at the Oscillator, without result. I don't find an equivalent IC from the SN 29730 with same pins. Thanks to help me !