Stage 3
Section 3: back to control pod, for headphone or subwoofer functionality
a common negative signal comes back out of pin 3
common negative is again grounded to pcb/chassis
common negative signal is connected to a 3.5mm plug-switch's common negative in-post
• STX3100-334726
left positive signal is sent to the headphone switch's positive left positive in-post
right positive signal is sent to the headphone switch's positive right positive in-post
Path 1 section 3A: If the switch is set to headphone, the headphone story
from the 3.5mm audio switch
the common(shared) negative signal is tied to a shared common negative post of the jack's headphone section
left positive signal is run to a 33ohm resistor
right positive signal is run to a 33ohm resistor
left postive signal is set to the left positive terminal of the jack's headphone section
right postive signal is set to the right positive terminal of the jack's headphone section
this is the end of the headphone story
Section 3A Questions
1.
Why is negative signal not also run to 33ohm resistors, to mirror positive signal handling?
Section 3B: if the switch is not set to headphones, subwoofer attenuation story
The common negative signal is sent to a 4k resistor
left positive signal is sent to a 2.85k resistor
right positive signal is sent to a 2.85k resistor
negative signal is tied to the negative post(s) of a dual unit linear 10k potentiometer
• Alps RK09712200MC
positive signals are joined together to common-common positive
common positive signals are split
positive common signal is connected to positive post of dual unit left linear
a negative signale is tied from potentiometer negative line out to the pcb ground
a positive common signal enters a 3.62kohm resistor
negative signal set to a 591ohm resistor
positive and negative are joined together before exiting to pin 1 to amp` power amp section??
negative is connected back to pin 3 signal negative
Section 3B Questions
1.
does negative connect to positive, or how is the diagram correctly read?
2.
is the ALPS 10k(total) potentiometer 5k total per channel?) or 10k total per per channel
i dont understand their meaning of total.
∘ **broken link removed**
∘ RK09712200MC
3.
is positive common mode made before entering the dual gang potentiometer, or by way of the potentiometer (in it)?
4.
is this dual-unit a 6 pin, two channel potentiometer, or a single channel potentiometer?
https://www.alps.com/prod/info/E/HTML/Potentiometer/RotaryPotentiometers/RK097/RK09712200MC.html
for example if this is a 6 pin potentiometer, then the comon positive is split before connecting to the left and right channels of the potentiometer
and then common positive is rejoined afterÉ
or by the unit itself