Now we are on the same page. Those critters are circled in green and are the input differential pair. The two sets of wires circled in red are your input wires to the main amplifier section of the amp. We are interested in the voltages in mv-ac, thought is to measure the value of ac they are carrying referenced to ground. Cool place to use your scope probe and signal generator. Set the signal generator to 1khz and 750mv output, probe the output from the signal generator with your scope to verify the scope settings match the sig gen (neat way to learn scope grid markings too , then attach sig gen to aux input. You should be able to measure the ac voltage at those two white wire connection points with the receiver turned off, if not there are a few extra steps to add, let me know how you make out.
If the reading rises too quickly add a resistor to each white wire to reduce the voltage appearing at the input stage of the amp. Unusual to have to do this. This would be the same thing as turning down the gain knob on a stand alone power amplifier. Next to the input pair, see the orange cap, that is the dc coupling cap, as long as you are in that part of the circuit would not hurt to replace it value for value with a Nichicon muse series bipolar or if the value is 1uf or below a even nicer Wima film capacitor. A 22k resistor would be a good starting point, change one and try and then decide if the reduction in signal is too aggressive and adjust accordingly.
Finally, the other thread that has a new member discussing his G4500 replied and states his unit also has a rapid (sensitive) volume control rise curve so we might just be chasing our tails as mentioned earlier in the replies but hey why not tailor the volume control to your liking. Can't hurt a thing, maybe the Sansui engineer that designed the small G series was hard of hearing lol.
-Lee
If the reading rises too quickly add a resistor to each white wire to reduce the voltage appearing at the input stage of the amp. Unusual to have to do this. This would be the same thing as turning down the gain knob on a stand alone power amplifier. Next to the input pair, see the orange cap, that is the dc coupling cap, as long as you are in that part of the circuit would not hurt to replace it value for value with a Nichicon muse series bipolar or if the value is 1uf or below a even nicer Wima film capacitor. A 22k resistor would be a good starting point, change one and try and then decide if the reduction in signal is too aggressive and adjust accordingly.
Finally, the other thread that has a new member discussing his G4500 replied and states his unit also has a rapid (sensitive) volume control rise curve so we might just be chasing our tails as mentioned earlier in the replies but hey why not tailor the volume control to your liking. Can't hurt a thing, maybe the Sansui engineer that designed the small G series was hard of hearing lol.
-Lee