The schematics are way too complicated for me to fully understand. Could you guys tell me what "VCCD2" in the schematic is , and where does it come from (origin)..?
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"VCCD2" is a 5V DC bias voltage (10V/2) supplied by U201-2 on the bottom of sheet 3. It is a signal "ground" rather than having a bipolar supply.
Hey! thank you very much for the help!!
Also there is a thermistor circuit on the power supply PCB which is connected through the pin 3 of connector J301 to the base of transistors Q304 , Q306 and Q307, what is the purpose of this circuitry? , is it for protection or for automatic gain adjustment in the NJM13700 OTAs (Operational Transconductance Amplifiers)..?
Also there is a thermistor circuit on the power supply PCB which is connected through the pin 3 of connector J301 to the base of transistors Q304 , Q306 and Q307, what is the purpose of this circuitry? , is it for protection or for automatic gain adjustment in the NJM13700 OTAs (Operational Transconductance Amplifiers)..?
