1

LA502 Optical Compressor / Re: No compression

« on: March 02, 2022, 11:27:54 PM »

;D;D Cool !! It Works perfectly now ! It was just one bad solder in R33 … big big thanks JPK for your help! I hope i’ll don’t need help for the next kit!!! 

2

LA502 Optical Compressor / No compression

« on: February 27, 2022, 03:34:16 AM »

Hello,
I have no compression when i turn the peak button. The gain button works good, the leds and other knobs works good too, i can visualize on the leds the compression amount, but by ear, there is no difference. I test everything, the only issue was a little solder bridge near r2 and r3, and i fix it. 
I don't know how to fix this compressionr problem, thanks for your answer

3

LA502 Optical Compressor / Re: C5 or not c5

« on: January 31, 2022, 09:13:55 PM »

Ok! Thanks

4

LA502 Optical Compressor / C5 or not c5

« on: January 30, 2022, 11:48:40 AM »

I just quite finish my 502
Everything 's ok

But, i'm not sure i have to solder c5.
In the document "parts list" come in the box with my 502, on the lune c5 , it's writed "not connected"
But on the picture on the guide, the c5 is soldered
It's renovation 23

Should i solder it or not ?

Thanks

5

501 Single Host / Re: Strange noise

« on: January 28, 2022, 06:52:03 AM »

Ok, i'll send you an email to know how send it to you

6

501 Single Host / Re: Strange noise

« on: January 25, 2022, 08:25:02 PM »

Hi
I open the switcher and check all the solder joint, nothing move, i check especialy the inductances radiales and the electrolytic condenseur, because it's the higher component, so the pressure could crush'em, but nothing moves, solders look ok
Honnestly i don't now where is the problem. 
Everything works great before i put it in the box
Should i test each component? I don't really know how to do
Thanks!

7

501 Single Host / Re: Strange noise

« on: January 24, 2022, 11:08:00 PM »

Hi, i had to do a better solder for the LM317T
And after, i did all the test again : and it work great !!!

But, when i screw everything in the box , i had to press a little because it's a little narrow
I turn on : nothing:'(

I take everything off the box
And test again
The main pcb work ok
But the switcher don't work now
All the switcher test failed
And no little buzz too
No red ligh
i checked every solder, because i could destroy a solder with the pressure i made to put everything in the box
But a don't see any issue

It's strange
Any advices?
Thanks

8

501 Single Host / Re: Strange noise

« on: January 22, 2022, 11:15:21 PM »

Hello

I just test the switcher 
I don’t have -19V , i have -33V
I don’t have +19v, i have 17 to 26 V
I don’t have 55V, i have 86V

I test the whole 501 too :

I have 11,86v (not exactly 12v)
I have 38 to 51 V (for 48v test)
I have -16V
But i don’t have +16v (1 or 2 V)

Maybe i damaged some component with too much heat ??

Always a little buzz

CAN i do something?
Thanks!!

9

501 Single Host / Strange noise

« on: January 18, 2022, 10:11:58 PM »

Hi,
I have 2 issues :
- i don’t have -16V when i test V-
- when i turn on , i hear a little electric buzz, it come regulary, and stop, like a clock. This sound come from the switcher. For the moment i can’t test the switcher, because i don’t have 12V Electric device 

Big big thanks for your help !!!