Avalon VT 737 sp

[punkt]

Ok so pin 1 or pin 10 is not connected (or both). Check to see if 12V is reaching the diode above K12. Measure DC between the two points circled here.

View attachment 147965

i connected them with wires, look at my previous post

nope not reaching the diodes

when measuring with only one probe on 1 diode it gets the 12v
but measuring between there is 0dcv with the eq engaged

 

[TheseGoToEleven]

i connected them with wires, look at my previous post

nope not reaching the diodes

when measuring with only one probe on 1 diode it gets the 12v
but measuring between there is 0dcv with the eq engaged

Ok, when you measure between K12 pin 1 and some other ground somewhere, like T7, is there 12V?

 

[punkt]

Ok, when you measure between K12 pin 1 and some other ground somewhere, like T7, is there 12V?

exactly,yes
pin 10 too

 

[TheseGoToEleven]

exactly,yes
pin 10 too

Ok wait... so between K12 pin 1 and T7 is 12V? And between K12 pin 10 and T7 is also 12V?

With the unit off, what is the resistance between K12 pins 1 and 10?

 

[punkt]

Ok wait... so between K12 pin 1 and T7 is 12V? And between K12 pin 10 and T7 is also 12V?

With the unit off, what is the resistance between K12 pins 1and 10?

i didnt use t7, i just used the screwhole to ground

p1&10 1k ohms

pin 7&8 seem to have 100k ohms, i think that one is defect, but before i jump to a hasty conclusion again, and do more damage

 

[TheseGoToEleven]

i didnt use t7, i just used the screwhole to ground

1k ohms

Ok that's fine, and 1k ohms is good. I'm not sure the wires you already did on 1 & 10 are needed, but you can leave them there for now. So it looks like pin 1 is all good but pin 10 needs to be connected to ground. Pin 10 must not be making contact to a ground trace inside the PCB. You can try reflowing pin 10, but if that doesn't work, you can wire it to another ground location, such as pin 10 of any of the other relays (or the circular pad of its diode.)

Examples:

 

[TheseGoToEleven]

Ok that's fine, and 1k ohms is good. I'm not sure the wires you already did on 1 & 10 are needed, but you can leave them there for now. So it looks like pin 1 is all good but pin 10 needs to be connected to ground. Pin 10 must not be making contact to a ground trace inside the PCB. You can try reflowing pin 10, but if that doesn't work, you can wire it to another ground location, such as pin 10 of any of the other relays (or the circular pad of its diode.)

Sorry, I made typos there so I fixed it in edit. Reflow or wire pin 10, not pin 1. Pin 1 is all good.

 

[punkt]

Sorry, I made typos there so I fixed it in edit. Reflow or wire pin 10, not pin 1. Pin 1 is all good.

GREAT SUCCESS!

edit: hope you saw the video ^^

 

[TheseGoToEleven]

GREAT SUCCESS!

edit: hope you saw the video ^^

I just saw it! I got stuck a phone call for a while but it was still there when I came back. So glad everything is working now. Soldering and desoldering relays is not very easy with the tools that you had available, so not too surprising that there were some difficulties but I think you got it all fixed this time! I think I saw a hidden leaf tattoo in one of your vids? Now maybe you have Avalon healing powers like Granny Tsunade

 

[punkt]

I just saw it! I got stuck a phone call for a while but it was still there when I came back. So glad everything is working now. Soldering and desoldering relays is not very easy with the tools that you had available, so not too surprising that there were some difficulties but I think you got it all fixed this time! I think I saw a hidden leaf tattoo in one of your vids? Now maybe you have Avalon healing powers like Granny Tsunade

Yea, also a Akatsuki Tat ^^, one more Problem(maybe) seems like the compressor, istn quite as sensitive as it used to be, but maybe just because i havenet heard it in a while

your diagram was very helpful!

 

[punkt]

I just saw it! I got stuck a phone call for a while but it was still there when I came back. So glad everything is working now. Soldering and desoldering relays is not very easy with the tools that you had available, so not too surprising that there were some difficulties but I think you got it all fixed this time! I think I saw a hidden leaf tattoo in one of your vids? Now maybe you have Avalon healing powers like Granny Tsunade

The compressor is definitly not working right, mic is right next to my hands

resistance between t5 and k7 p4 is zero (while unit is on or off)

 

[TheseGoToEleven]

Is it working on the recorded audio and the VU just isn't showing it right?

Is it any different with the side chain turned off? (Edit: Oops I see it was off)

You have gain all the way up, threshold all the way down and compression all the way up so it should be crushing that clap.

 

[punkt]

Is it working on the recorded audio and the VU just isn't showing it right?

Is it any different with the side chain turned off?

You have gain all the way up, threshold all the way down and compression all the way up so it should be crushing that clap.

i cranked it up in the videdo to the max, yea it should be definitly adding aton of compressor, it is also not reall working in the audio
sidechain was off
any idea what to check

edit: just made sure doesnt matter which button is on, only comp and sc, or only comp, or eq>comp, it doesnt respond diffenrtly

 

[TheseGoToEleven]

i cranked it up in the videdo to the max, yea it should be definitly adding aton of compressor, it is also not reall working in the audio
sidechain was off
any idea what to check?

Does it work better with slower release? I wonder if this could be related to changing out the caps on the compressor board. I have to step out for a bit now, but if you have before/after pics of the compressor caps, post them. Nothing else was changed on the compressor board, right?

 

[punkt]

Does it work better with slower release? I wonder if this could be related to changing out the caps on the compressor board. I have to step out for a bit now, but if you have before/after pics of the compressor caps, post them. Nothing else was changed on the compressor board, right?

no it doesnt really do much, all right maybe @pucho812 has a idea, i need to take a look at my phone, deleted lots of picture.

no, but it maybehave to do with the broken solder pad, i will look into it

 

[punkt]

Does it work better with slower release? I wonder if this could be related to changing out the caps on the compressor board. I have to step out for a bit now, but if you have before/after pics of the compressor caps, post them. Nothing else was changed on the compressor board, right?

I think I found the reason, its the cap where i lifted the pad, the pad doesnt make contact, will fix now, hope its the solution to this problem

edit:
nope no luck, wired it, but no difference in compression

resistance between t5 and 64 is about 100k

 

[TheseGoToEleven]

I think I found the reason, its the cap where i lifted the pad, the pad doesnt make contact, will fix now, hope its the solution to this problem

edit:
nope no luck, wired it, but no difference in compression

resistance between t5 and 64 is about 100k

That cap is C1 on the compressor. On the positive side of the cap, it connects to a DC power supply coming from pin 10 of the J1 connector (J1 written on the compressor card, not the motherboard). On the negative side it should connect to ground. But here is the thing... the through hole on the positive side of the cap doesn't just connect the DC power supply to the cap; it also has to connect the trace on the top of the board all the way through the hole and connect it to the trace on the bottom of the board.

 

[punkt]

That cap is C1 on the compressor. On the positive side of the cap, it connects to a DC power supply coming from pin 10 of the J1 connector (J1 written on the compressor card, not the motherboard). On the negative side it should connect to ground. But here is the thing... the through hole on the positive side of the cap doesn't just connect the DC power supply to the cap; it also has to connect the trace on the top of the board all the way through the hole and connect it to the trace on the bottom of the board.

yea i knew, after soldering it on, i checked the cap with the multimeter and it has infinite resistance, its dead.
gotta wait for new caps ._:

 

[punkt]

here is a picture of the 7374, if someone needs to trace something in the future

 

[TheseGoToEleven]

i checked the cap with the multimeter and it has infinite resistance, its dead.

For caps that can be just fine. Zero can be just fine too. They don’t test the same as other things. Here’s what to check:

On the compressor board, what is DC voltage of pin 10 of the J1 connector? (black probe on any ground)

What is DC voltage on the top of R3? (It should be the same)

This is to see whether the traces on the top and bottom of the card are both getting DC.