JLM AUDIO

Hi there, awhile back I bought a VU2 board and a pair of sew-160 meters. The purpose to build a case to match with my Technics. I built the board as per your instructions, everything seem to come on, the meters jump a little when power on, but no movement from audio input (tried multiple sources) I...

Alex1990 wrote: ↑

Thu Dec 14, 2023 7:34 am

Yep just desoldered meter so it’s all good.

Hope this helps.

Worth if you have any pot cleaner to give the inside of the pot a tiny spray and remeasure with pot fully CCW to see if it returns to 10k. Otherwise the pot will need to be removed from the pcb and replaced.

[quote=Alex1990 post_id=5212 time=<a href="tel:1701388593">1701388593</a> user_id=2368] Hi- So with both SC and/or BIO boards unplugged it’s still 300ohm Pull out the pot pcb out and if it measures 10k try measuring from the pot legs to the pot metal frame to see if there is a short internally in t...

slb1959 wrote: ↑

Tue Dec 05, 2023 11:03 pm

Hi Joe

The values for VTX or oep a262a3e componentes are the same?
I have caps 100uf 25V. Can i use it instead 35V?

Thanks, Luís

Yes transformer values are the same. Yes 100uF 25v is perfect.

slb1959 wrote: ↑

Sun Dec 03, 2023 4:25 am

Thanks Joe.
I sent to you one answer to your email.

I haven't seen your email?

Alex1990 wrote: ↑

Fri Dec 01, 2023 9:56 am

Hi- So with both SC and/or BIO boards unplugged it’s still 300ohm

Pull out the pot pcb out and if it measures 10k try measuring from the pot legs to the pot metal frame to see if there is a short internally in the pot.

Let me know what you find.

slb1959 wrote: ↑

Wed Nov 29, 2023 9:15 pm

Hi Joe.

Received and tested with power.
The idc 10 pins is a power connector for other pcb´s?
The idc 14 pins is for input/output connections?
Can i have the diagram of that?

Thanks, Luís

HI Luis
Added the info to first post above.

Here we go! I did try reflowing make up pot joints just in case but it didn’t help. If you measure the makeup pot outside pads with pot fully CCW and BIO unplugged do you read 10k? Hi Joe Do you mean these pads? Reading is 300ohm Best, Alex Yes unplug the BIO pcb ribbon cable and see if it changes ...

Hi Joe, I was wondering if you might be up for designing a companion board that had the logic to make this into a 4:1 stereo balanced source selector? Using momentary action pushbutton switches and including the LED drivers. I think others might find that useful as well. Thanks, Paul HI Paul Intere...

Hey Joe just bumping my message. I have a lengthier write up back a page. Still can’t get compression to act how I’d expect it to despite everything else working. Please get back to me when you get a chance, thanks so much. HI Ok doesn't make sense that you could cal the comp but then with audio no...

If it is assembled remove the BIO take a good couple of photos of the top of the sc pcb and bottom of pot pcb first and I will check it Here we go! I did try reflowing make up pot joints just in case but it didn’t help. If you measure the makeup pot outside pads with pot fully CCW and BIO unplugged...

If it is assembled remove the BIO take a good couple of photos of the top of the sc pcb and bottom of pot pcb first and I will check it

Hey Joe, Found the issue on the SC board (I think) after re-checking every component-I had the 79L12 and 78L12 line voltage regulators switched. (I am supposed to have the C18 .1U cap installed- correct?) Pretty sure I fried them in the process of getting them out so are these fine replacements? (f...

Hey Joe just bumping my message. I have a lengthier write up back a page. Still can’t get compression to act how I’d expect it to despite everything else working. Please get back to me when you get a chance, thanks so much. HI Ok doesn't make sense that you could cal the comp but then with audio no...

Yes brilliant as I suspected thank you. A dumb question - would you supply all components necessary to populate a double/quad board - the price doesn’t seem to change between single and quad so a bit confused. HI You need to order as many single-parts kits as you need and then pick how you want the...