No sound on outputs (x0xsh0p.de kit)

[guest]

can you post a clean picture of the vca section
it might be that the solder joints need to be reworked

im suprised to hear that the original ba6110 is working now
which makes me think that the solder joints might be bad

can you list all the voltages on the ba6110
for note off and note on conditions

[exagonal]

Ok i made some pics of VCA section, hope you can see clear the joint points...I also thought that I could depend on some welding, when the BA6110 are out of work, and after some welding pass again I noticed that i felt a low gain sound, and the VCA is always open.
As far as the voltages of the BA6110, they do not change in the least to the pressure of the note key, in keyboard mode, and these are:

1. 5.31 v
2. 5.31 v
3. 0 v
4. 0.94 v
5. 0 v
6. 5.04 v
7. 5.04 v
8. 5.33 v
9. 11.82 v

[exagonal]

Sorry, i forgot the pictures

See that at this links :

http:\\www.exagonal-rooms.com\images\CIMG0508.jpg
http:\\www.exagonal-rooms.com\images\CIMG0510.jpg
http:\\www.exagonal-rooms.com\images\CIMG0512.jpg
http:\\www.exagonal-rooms.com\images\CIMG0513.jpg
http:\\www.exagonal-rooms.com\images\CIMG0514.jpg

[guest]

the solder joints look great
but there might be some bits between pins 2 and 3
on the vca
that are getting in the way

the voltages look ok

what are the datecodes on both ba6110 you have
are they the same

is it constantly making sound now
if yes
does it sound ok except for lack of envelope

[exagonal]

In fact, I even think about this ... could be something in the envelope section? The datecode of the chip that better work is 029 147 while the other is marked 402 155

[guest]

its possible its in the envelope section

is the x0x always making sound now?

[MMM]

its possible its in the envelope section

I'm a bit unsure about this one:

4. 0.94 v

Shouldn't pin 4 be on 0v normally? If it's always on nearly 1v this could explain why there's always sound.

[exagonal]

yes, just for this, could it be the envelope the malfunctioning section ?

[MMM]

yes, just for this, could it be the envelope the malfunctioning section ?

I think up to Q4 everything looked ok. If that indeed is the case it would leave Q1 and Q2 as the "suspects". But I'm not completely sure about this - it still could be the BA6110.

[guest]

if it is making constant tone now
check that q1 through q4 are all the right type
a bad or wrong transistor in one of those places
could pull down the 12v rail when the ba6110 is inserted

then check the voltage on d35
both for note on and note off
it should go from 12v to 0v
if thats good
check the voltage at the q31 and r131 juncture
it should go to around 1v when a key is pressed
and then float back up to 12v over the next few seconds

[exagonal]

In the cathode of D35 there's a constant voltage of 1.03 V. When do short press note (like a pulse) this drops to 0 for a few seconds and then slowly up to 1.03 V.
Something different if you hold down the button ... the voltage rises up to 11.80 V.
Such behavior occurs in the junction of Q31 and R131, we have a constant voltage of 1.13 V at rest, with brief pressure drops to 0 before increasing again to 1.13 V, with a long press takes you directly to 11.80 V

[exagonal]

I think I can completely exonerate the BA6110. Today I received the new one, replace the latter that I ordered, and works like the first, the original kit: low volume and VCA always open ... we begin to look elsewhere!

[guest]

i would reccomend
leaving the ba6110 out of the socket
until we figure out what the other problem is
that will prevent it from getting hurt

did you double check q1 through q4
that they are the right types

check the voltage on r146
the side that goes to the microcontroller
it should go from 0v to 5v
when you hold a key in keyboardmode

if that works
then check r143
the side that goes to q37
it should go from 12v to 0v
when you hold a key in keyboard mode

[exagonal]

I check the voltage on r146
the side that goes to the microcontroller
it going from 0.04 v to 4.85v
when i hold a key in keyboardmode

then i check R143 in
the side that goes to q37
it going from 11.60v to 0.02v
when i hold a key.

Apparently they are working well...

[guest]

check d35 again
it should go from 0v to 12v when a key is held down

then check pin4 of the vca socket
it should go from 0v to 12v when the ba6110 isnt inserted

are q1 through q4 the right types