R1,R2,R3,R4 are all small value resistors so you should have about 10V (little more than 10V) there. So as 6L6 mentioned......you may have a bad solder connection there.......
Then it must be a bad connection else you would have a voltage drop of 6V over the R4.....then it will be hot......
R4 is probably cold at the non working amp and a little bit warmer at the working amp.....
I respectfully disagree, maybe this is going a bit offtopic (and I’ll drop it after this post) but I love the precision of small speakers and simple 2 way systems. Big speakers are often suffering from unwanted resonances.
Anyway, love my George!
we are obviously talking/thinking of different things 🙂
though , don't bother with that , enjoy in your system
though , don't bother with that , enjoy in your system
Soldering station with temp control, helping hands/alligator clips, shaky hands and I think I need bifocals now. Lol
It’s not clear to see from your pics but everything sticking through the board seems pretty long, especially top left two points. Are you sure you’re not shorting anything to the heatsink?
Dan
I thought of that....last couple of tests have been a quick flip on of the amp without being attached to heatsinks to eliminate that being the issue. So, that isn't the issue.
I have a bunch of small speakers i really like, but they are all 1-way. Definitely something to be said for no XO to get in the way.
dave
This one looks suspect need some proper rework.
Maybe the solder tip temperature is too low or too high?
Remember to give first some heat for a few seconds and apply solder after for short ~2 s
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This one on the left is OK try all soldering point look like this be ideal.
PCB always in flat horizontal position if You work on components soldering.
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Read your voltages at Q1 pin 1,2,3 and Q2 pin 1,2,3
Compare left to right
The light coming on means the LED works, nothing more. We already know the PSU works because the other channel is good. 🙂
Compare left to right
The light coming on means the LED works, nothing more. We already know the PSU works because the other channel is good. 🙂
Could You show on the photo(s) what the PCB's looks now ?
Do You reflowed all mosfets as well ?
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