I would like to connect my phone via jack cable (aux in) to my car stereo, which has no aux input (brand: JVC KD-G151). It is a CD player, so i wrote a silent disk to operate the cd player, and tried to figure out the connection points for the input signal.
Here the datasheet logic: (sorry for the shortcomings, I'm just a hobbyst wiht very limited knowledge)
- From DSP_DAC RO and LO signals go on a 1.5V channel (AC or DC i dont know)
- Next is the CD low pass filter, the output voltage 4.5V (AC or DC i dont know)
- Last is the E.VOLUME block where the input voltage 4.4V (AC or DC i dont know) I connected the signals after the R595 and R585 resistors, and it works great. But one problem: first i had to connect the jack to the phone, start the music, and connect the aux to the resistors (i am using a switch now) In case of other order, it not works, signal not go through to E.VOLUME.
I can measure the 4.4V on E.volume input, so direct connection not sound good to my phone jack(can it damage my phone?) Does anybody knows, where should i connect it without to damage the input source? Before the CD low pass filter? With capacitor to block the DC voltage? Thanks. David