Yes those voltages are with remote applied.
Without remote and amp still powered up:
1= 3.02v
2= 1.71v
3= 17.00v
4= 0v
5= 4.96v
6= 4.96v
7= 0.00
8= 2.40v
9= 2.70v
10= 1.40v
11= 1.40v
12= 0.0
13= Goes up and down between 0.66v to 1.11v
14= 1.2v
I just noticed the thermal light lights up along with the power and protect. In both scenarios with and without remote.
Without remote and amp still powered up:
1= 3.02v
2= 1.71v
3= 17.00v
4= 0v
5= 4.96v
6= 4.96v
7= 0.00
8= 2.40v
9= 2.70v
10= 1.40v
11= 1.40v
12= 0.0
13= Goes up and down between 0.66v to 1.11v
14= 1.2v
I just noticed the thermal light lights up along with the power and protect. In both scenarios with and without remote.
Arite, 95% of the demons were beat out when I replaced the 339. Remote worked again, thermal light went out, came out of protect. I stopped here for today, I have some work to complete on the thermistors as I had these jumpered to the board (seemingly I don’t have the originals on the MESHA thermal pads) and a couple other ends to tie up due to the troubleshooting process, hopefully I can have this done tomorrow and I get to test it out. Will let you know how it goes.
Arite, I got the back together powered up and did some audio tracing with the scope as I didn’t have audio on the output. I replaced all op amps TL072s, in the pre amp section and I got some progress. I have audio at the output with the master/slave switch set to slave. With the switch in either master or single I don’t get any audio output.
With no signal connected I have a 25hz signal at the output.
I rechecked the PWM A+B and the triangle wave, all are present.
I cleaned the switches but this didn’t help.
Any of you guys ever saw this? And/or could help me proceed?
With no signal connected I have a 25hz signal at the output.
I rechecked the PWM A+B and the triangle wave, all are present.
I cleaned the switches but this didn’t help.
Any of you guys ever saw this? And/or could help me proceed?
That's odd. This is a 'state variable' filter. Most use 3 variable resistors. I'm not familiar enough with them to know if the 4th (higher rolloff) is a different value. If you ask on the following forum, maybe they could tell you definitively.
https://www.diyaudio.com/forums/analog-line-level/
What do the sections in the one you have read?
https://www.diyaudio.com/forums/analog-line-level/
What do the sections in the one you have read?
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