It is a router that have a function to create an WiFi streaming server for music , have 2V rms output , it has an 3.5mm output , it is analog and also optical.it is useful because i have it modded for car and I also have for home.
So, you're feeding that signal into the RCA input, correct?
Then the OEM mid. Are you using this to try to find audio? A standard speaker?
Then the OEM mid. Are you using this to try to find audio? A standard speaker?
Yes on both. I just wire a speaker to be able to hear it and be able to connect to amplifier output.
Are you using the speaker on the preamp level signals on the board?
Do you have a cheapo set of earbuds?
Do you have a cheapo set of earbuds?
I used the speaker on channel output of the amp ,I have a some pairs of earbuds , but I also don’t care about that midbass. I touched the probe(rca) on different location in the signal chain , so if I touch the bad channel on the rca hot of the bad channel then I have sound because I closed the circuit and the signal goes to a good channel.
The earbuds (with a capacitor in series with them, will be less likely to load the circuit.
You have the diagram, you need to drive signal into the amplifier's bad channel and note whether you have signal at every op-amp output in the channel being tested. You can use a test tone and measure the ACV at each point for each channel and map each channel to see where the signal is lost.
You have the diagram, you need to drive signal into the amplifier's bad channel and note whether you have signal at every op-amp output in the channel being tested. You can use a test tone and measure the ACV at each point for each channel and map each channel to see where the signal is lost.
the speaker connected , with no input signal or with signal attached makes like an radioactive testing device all the time, if I touch on the rca connector the corresponding pin for the rca hot side on bad channel it gets louder but “broken” noise , if I touch on the other side of rca “hot” , I had sound,on ic output it just makes a little pop and all the sound stops. The rca board have 2 connectors , a 4 pin one and a 3 pin and have 2 caps, I think ceramic.
You may need to connect the RCA shield to the ground terminal of the amp. I don't know what the ground is in your router and it could be causing a problem.
So my signal is lost on the rca board, seems illogical to me , on the solder of the rca hot I have signal, then at the connector , being just an simple wire, I don’t have the same signal. Resolder everything on rca board yesterday and test for continuity from rca hot to the motherboard rca connector,and all was allright. I tough it is a bad solder joint on the rca board, put it back , pun the midbass to test , power on , 2 seconds (no input signal) and the midbass goes like crazy, loud and makes plenty of movement.
If you operate all pots and switches through their entire range, do you ever get audio passing through the bad channel?
Did you try grounding the RCA shields?
Did you try grounding the RCA shields?
Nothing, just when I switch , like acoustic compensation or bridge /mono, it makes a little pop. On the gain if I turn in down at minimum yesterday the buzzing got louder and worse , if turned from like 5% the buzzing got low on volume and had music but very very low. The gain pot was working perfect before, no skipping, no nothing.
We're back to tracing the signal to every op-amp output and finding the last point where you have signal. Then you can troubleshoot from that point. Before you can do that you need to get some consistency.
Did you try grounding the RCA shields?
Did you try grounding the RCA shields?
I grounded also , I cannot trace the signal because it stops on the first “checkpoint” , my logic is that the problem is on the voltage side not on the acoustic part. If I turn it on , as soon as it passes 3 seconds it starts to send dc like crazy on the speakers output.
I din’t touch it , in the morning I connect the multimeter to read if I had dc on channel 1, on channel 3 and 4 I had the midranges , I started the amp and the midranges start to go crazy , on channel one was 0,2 then 2V after that I turn it off to don’t kill the good speakers.so the problem migrates from one channel to all other channels.
So the plan is to resolder the voltage regulator parts nicely then power on the amp and see if it outputs dc voltage, I also connect a speaker to see if I have noise . I will do that tonight when I go home.
Those are likely OK but I've never seen the brands. What are you using to desolder? You need to remove all of the old solder before you resolder the connections.
Rework the solder connections on the regulator components and see if anything changes.
Rework the solder connections on the regulator components and see if anything changes.