xoxshop.de no sound (UPDATE)

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acidbuzz123
 
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Re: xoxshop.de no sound (UPDATE)

Post by acidbuzz123 »

on c3 i get 29,8AC/13,77DC
on c5 i get 30,9/14,23

j4- on PSU pin 1-2 11,2 AC/ 5,32 DC
pin 2-3 25,6 / 11,87

the resistance between the j4 cable is 0,3 ( same values when i touch the two probes)

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antto
 
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Re: xoxshop.de no sound (UPDATE)

Post by antto »

ah, so the previous measurement (11.14V) must has been faulty

all voltage seem normal then

i don't have any other ideas

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acidbuzz123
 
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Re: xoxshop.de no sound (UPDATE)

Post by acidbuzz123 »

hmmm sh*t...
what should i do now ?
maybe ill ask the xoxshop.de team or my local electronic store for help.
but first i will check the values and the orientation of all components on the io board...

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acidbuzz123
 
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Re: xoxshop.de no sound (UPDATE)

Post by acidbuzz123 »

IC 23 (op-amp) is getting much hotter than any other components...
is that a problem? is it damaged?

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antto
 
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Re: xoxshop.de no sound (UPDATE)

Post by antto »

mine is getting a bit hot too, but it's working
if it's terribly hot and/or it starts to smell funny - then i would be worried

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acidbuzz123
 
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Re: xoxshop.de no sound (UPDATE)

Post by acidbuzz123 »

UPDATE:
i have contacted the xoxshop.de team and got a new LM336 (Ic 22) and now the voltages of the pcu are correct.
5,33 V and 11,87 V. :)
but there is still no sound and the cv voltages are also weird.

so as next step i will check the io board.
maybe Q32,36,37,39,48; C44; 6110,7805 or 4060 are faulty.

im happy about all suggestions!

cheers

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acidbuzz123
 
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Re: xoxshop.de no sound (UPDATE)

Post by acidbuzz123 »

UPDATE:
I have compared the voltages of Q32,36,37,39 and C44,48 with the Analog Section Reference Voltages
( http://forums.adafruit.com/viewtopic.php?f=12&t=12453 ) and all values are similar to the values of the eagle file.
i think there is a problem with one of the ic chips.
here are the values:
IC 15B
pin1 - 5,33V
2 - 5,33V
3- 0V
4 - 0,2V
5 - 0V
6 - 5,29 V
7 - 5,29V
8 - 5,35V
5 - 11,91V

IC 12
1 - 3,26V
8 - 11,90V
2 - 0V
9 - 0,03V
3 - 0,05V
10 - 10,78V
4- 0,03V
11 - 4,58V
5 - 0V
12 - 4,58V
6- 0,05V
13 - 4,58V
7 - 0V
14 - 4,54V

IC 9
1 - 5,34V
9- 5,34V
2 - 5,34V
10- 5,34V
3- 5V
11 - 5V
4 - 0V
12- 5V
5- 0V
13 - 5,34V
6- 4,98V
14 - 4,98V
7 - 5,34V
15 - 5,34V
8 - 0V
16 - 0V

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