Bugg daydream

[preserves]

It powers on all works well but is has super low volume I need solutions.

 

[jwin615]

That opamp looks shot and did you sand through the solder mask below it?
If both dry and fx are low, Id check the inputs of the summing stage onward with an audio probe.

 

[jwin615]

Transistor pin orientation checked? Are ICs good, not fake?

I know this isn’t what it looks like, but still cannot unsee cracked IC here.
View attachment 104686

Zoom in

 

[preserves]

I thought that to when I saw that so I went and checked it was just undried alcohol

 

[preserves]

And no sanding took place on that board . Hahaha

 

[jimilee]

Voltage and audio probe time.

 

[preserves]

Your right after futher inspection the chip looks toasty.

 

[preserves]

@jwin615

 

[preserves]

I will switch out that chip and retest. Boy you get so much more help on this site than guitar pcb. Takes like 24 hrs for a reply on there makes trouble shooting next to impossible the same day for a beginner.

 

[preserves]

Thanks to all for the help so far.

 

[chongmagic]

Transistor pin orientation checked? Are ICs good, not fake?

I know this isn’t what it looks like, but still cannot unsee cracked IC here.
View attachment 104686

He dun let the tone out!

 

[preserves]

Got it removed just in time for the wife to yell its time for dinner. So I guess the rest is for tomorrow

 

[falco_femoralis]

There are 3 ground solder pads on the board but it's ok to consolidate your grounds in the wiring and only use one or two of the pads.

Take your meter and put the neg probe on any main ground and use the pos probe to touch all the pins of each IC except the FV-1 and report back what voltage you get at each pin.

IDK if your TL072 looks legit. The ones I use have the black dot on the top left rather than the half moon cutout at the top. Definitely socket the new one to make it easier to swap out

 

[preserves]

I usually do socket them I don't know what I was thinking on this build. I do have some with the black dot as well I will use them

 

[jimilee]

I will switch out that chip and retest. Boy you get so much more help on this site than guitar pcb. Takes like 24 hrs for a reply on there makes trouble shooting next to impossible the same day for a beginner.

We got a good group here, lots of experience.

 

[preserves]

It seems pretty friendly for sure

 

[pettert]

I'm no pro and never worked with the fv-1 makes me want to back out, but my feeling is that it's audio probe time?

I usually start at both ends, make sure there's a decent signal in to the board, and then first step after that is if bypassing the last pontentiometer does anything for the signal level. After that it's divide and conquer time, at suitable spots chosen by reading the schematic.

 

[mybud]

Those MDSHY 072s are problematic by many accounts here and elsewhere. If not fake, badly specced. These may or may not be contributing to the problems you’re experiencing.

 

[preserves]

Thanks for the info and knowledge I will get back after it after work today.

 

[Robert]

Turn the Mix control all the way down so the output is 100% clean, no effect.

Is the clean volume low?

If so, you can ignore the FV-1, EEPROM, and regulator for now.


Are you sure you got those TL072's from Tayda? Those don't look like genuine TL072's and I've never known Tayda to sell fake parts...

 

[preserves]

Yes everything is low still when mix is off. I will switch out the 072s today