I have a TRS jack mic and I connected it to the mixer following all the instructions yet the peak indicator never flashed nor any sound had been recognized its basically not working for some reason and I have only head phones for right now.
SOURCE: I am using the Yamaha
Unfortunately, I do not have a solution for you. However, I recommend calling Yamaha, as they should be able to help you troubleshoot the problem.
SOURCE: I have a yamaha Emx312sc
Hi lholton,
This symptom indicated that you have a faulty OpAmp IC in the Mix circuit board. The IC's involved is the NJM2068M-D and NJM4558M-D. If I'm not mistaken you have more than 15pcs of this IC's in the circuit board that control the mics inputs. This is a 8-pin IC in D package. You must have at least 2 good IC's spare if you are going to DIY to swap or compare the reading of each IC's in the board.
Also, bad solder joints must be consider in that board and in the power supply feeding this board. Check it first, this is hard to spot, I would advice you to work in the brightest area or used table/portable lamp and magnifying glass. Re-solder as much as possible.
Let me know if you need further assistance.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.
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A TRS jack is commonly used for insert in/out channels. The pinout is as follows: tip hot(+ve) ring cold (-ve) sleeve ground/shield.
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