ak4524vf, need help to repair AD/DA

lagoausente · 6th June 2006, 06:45 PM

I have 3 audio interface just the same, they are 3 Seasound Solo EX.
In the rack, they have a separate board for AD/DA wich is conected to the mainboard. It has the chip ak4524vf. I have the Schematic, but need knowlegde and experience for anyone of you.
I know that the problem is on that board, because one of the three one, works ok in all three interfaces, so I have two boards damaged.
I would need help to find if the problem is the chip, and where I can find it, and what tools need to can replace, because it has very small legs.
Replies here, or in my email: Jose_ferreira_coira@hotmail.com

rfbrw · 7th June 2006, 04:11 PM

What is the fault ?

lagoausente · 7th June 2006, 07:57 PM

what do you mean?
I´m not sure if is only this chip what is wrong. I would need some help to understand the schematic, to find out the problem. If it is this chip, don´n know where to buy it, and if there is any equivalent con current electronic stores. Can you help?

rfbrw · 7th June 2006, 09:30 PM

If it does not work, then it is either doing something it should not do or it is not doing something it should do. Either way some description of what is wrong would be useful.

lagoausente · 8th June 2006, 09:05 PM

It does not do what would must to do. When insert the damaged board, there is no comunication to/from the pc. There is no AD/DA signal. When insert another board that is ok, the hole interface work ok, and comunication to/from the pc, is ok, the AD/DA occurs ok.

rfbrw · 8th June 2006, 09:38 PM

Have you checked the connectors between the board and the interface? Are you able to test the boards without using the interface ? Have you checked the power supply voltages on the boards? What tools do you have ? Can we see the schematic?

lagoausente · 9th June 2006, 09:20 PM

Q: Have you checked the connectors between the board and the interface?
R: They seem fit ok, it´s a multipin conector male/female, it´s a stable conection, the soldering also looks ok.

Q: Are you able to test the boards without using the interface ?
R: I think could be done, would must take the correct voltages from the mainboard to the codec board. When the codec board is fixed on the mainboard, the components are backside, son there is no way to have access to all of them, so.. seems must soldering some cables to can separate the codec board form the mainboard maitaining the Voltages.

Q:Have you checked the power supply voltages on the boards?
R: On the input of the board, there are the main voltages, are ok, have no tested individual voltages on components and on chip, because need help to understand the shematic
Q: What tools do you have ?
R:Basics, polymeter, tin, soldering iron (I´m spanish trastaling with dictionary..)

Q: Can we see the schematic?
R: Of course, it´s here: http://www.musickatz.com/seasound/so...s/codec25x.PDF

rfbrw · 10th June 2006, 07:09 PM

Check JP1/con2 on the board that works and see if it is the same as the boards that do not. And also check the Module ID code on the working board and compare that with other two.
If the above does not work, you will need to make an extension cable so that you can test the board while it is plugged in.

You could also try putting out a call to the Spanish speakers in this forum and here

lagoausente · 10th June 2006, 08:10 PM

Thanks for your colaboration:

Module ID code gives the same resistance on all.
Jp1 gives different. On the board the is ok, gives more than 1kohm,
on the damaged gives 48k, what seems the value of R1, so seems pin 1 of JP1 is grounded.
I think you have now more info, can you tell me the next test must i do?

rfbrw · 10th June 2006, 08:25 PM

On the good board is JP1 open or closed?

6th June 2006, 06:45 PM	#1
lagoausente diyAudio Member Join Date: Feb 2002	ak4524vf, need help to repair AD/DA I have 3 audio interface just the same, they are 3 Seasound Solo EX. In the rack, they have a separate board for AD/DA wich is conected to the mainboard. It has the chip ak4524vf. I have the Schematic, but need knowlegde and experience for anyone of you. I know that the problem is on that board, because one of the three one, works ok in all three interfaces, so I have two boards damaged. I would need help to find if the problem is the chip, and where I can find it, and what tools need to can replace, because it has very small legs. Replies here, or in my email: Jose_ferreira_coira@hotmail.com

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7th June 2006, 04:11 PM	#2
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	What is the fault ?

7th June 2006, 07:57 PM	#3
lagoausente diyAudio Member Join Date: Feb 2002	what do you mean? I´m not sure if is only this chip what is wrong. I would need some help to understand the schematic, to find out the problem. If it is this chip, don´n know where to buy it, and if there is any equivalent con current electronic stores. Can you help?

7th June 2006, 09:30 PM	#4
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	If it does not work, then it is either doing something it should not do or it is not doing something it should do. Either way some description of what is wrong would be useful.

8th June 2006, 09:05 PM	#5
lagoausente diyAudio Member Join Date: Feb 2002	It does not do what would must to do. When insert the damaged board, there is no comunication to/from the pc. There is no AD/DA signal. When insert another board that is ok, the hole interface work ok, and comunication to/from the pc, is ok, the AD/DA occurs ok.

8th June 2006, 09:38 PM	#6
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	Have you checked the connectors between the board and the interface? Are you able to test the boards without using the interface ? Have you checked the power supply voltages on the boards? What tools do you have ? Can we see the schematic?

9th June 2006, 09:20 PM	#7
lagoausente diyAudio Member Join Date: Feb 2002	Q: Have you checked the connectors between the board and the interface? R: They seem fit ok, it´s a multipin conector male/female, it´s a stable conection, the soldering also looks ok. Q: Are you able to test the boards without using the interface ? R: I think could be done, would must take the correct voltages from the mainboard to the codec board. When the codec board is fixed on the mainboard, the components are backside, son there is no way to have access to all of them, so.. seems must soldering some cables to can separate the codec board form the mainboard maitaining the Voltages. Q:Have you checked the power supply voltages on the boards? R: On the input of the board, there are the main voltages, are ok, have no tested individual voltages on components and on chip, because need help to understand the shematic Q: What tools do you have ? R:Basics, polymeter, tin, soldering iron (I´m spanish trastaling with dictionary..) Q: Can we see the schematic? R: Of course, it´s here: http://www.musickatz.com/seasound/so...s/codec25x.PDF

10th June 2006, 07:09 PM	#8
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	Check JP1/con2 on the board that works and see if it is the same as the boards that do not. And also check the Module ID code on the working board and compare that with other two. If the above does not work, you will need to make an extension cable so that you can test the board while it is plugged in. You could also try putting out a call to the Spanish speakers in this forum and here

10th June 2006, 08:10 PM	#9
lagoausente diyAudio Member Join Date: Feb 2002	Thanks for your colaboration: Module ID code gives the same resistance on all. Jp1 gives different. On the board the is ok, gives more than 1kohm, on the damaged gives 48k, what seems the value of R1, so seems pin 1 of JP1 is grounded. I think you have now more info, can you tell me the next test must i do?

10th June 2006, 08:25 PM	#10
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	On the good board is JP1 open or closed?

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