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.. SG is signal ground, the outside of the RCA jack.
The L and R are signal, which is the center of the RCA jack. SG is signal ground, the outside of the RCA jack.
Thank you so much. This amp is so fun to built even though I have very little knowledge about electronics
Can I get a higher res photo of the amp board? Top and bottom.What voltage do you get off of one of the OsCON's?It is probably something simple. It happens.
notice the part I circled. I through hole filled with solder by accident.
I'll keep looking but I can't tell anything obvious from these photos atm, maybe there is... Knowing the voltage of the OSCON's will tell us more.
Just looked at the chip with my magnify glass. looks good, no solder is touching other legs. I do see that the middle pin on the first row (closest to the chip) is soldered on the bottom only. The top potion of the hole is not full of solder. What is that leg for? Maybe thats the isue? I will fix this tonight and see what happens. My Iron is a Weller Soldering station, its a fixed temp. not sure of the temperature.
Usually it involves looking at it forever ever and ever, thinking about it a lot... feeling insane. Doing something stupid like replacing the chip and it still not working. At this point you may want someone to take a look. But you already had that one engineer take a peak? Think he's up for soldering in a new chip? Before you do that, plz double check the codes on the resistors for mute/standby. You can find resistor code things online where you can put in the colors.
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