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09-10-2008, 10:32 PM
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Head-Fi'er
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Join Date: Jul 2008
Posts: 52
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OK, say if I had all the insides of my iPod wired up (DAC directly to Ports 14 and 17). Then how would the caps go? Do I just snip the wire in two and solder one lead of the Cap to one half of the wire, and the other lead to the other half, and wire that to a iPod dock connector, and everything should work out right? Which side goes first? The Neg or Pos?
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09-11-2008, 12:07 AM
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500+ Head-Fi'er
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Join Date: Jul 2008
Location: Sydney, Australia
Posts: 665
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Quote:
Originally Posted by mbarry
Which side goes first? The Neg or Pos?
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I asked the same thing 7 posts above. Drew a little diagram too.
This is how it goes:
Code:
R )-----+|(-----(
iPod G )-------------( Line Out
L )-----+|(-----(
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09-11-2008, 01:41 AM
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Headphoneus Supremus
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Join Date: Jul 2006
Location: Edmonton, Alberta
Posts: 1,720
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You may want to replace the wires entirely as they may need to be a bit longer to accommodate for the caps. Also, hot glue is highly recommended to secure wires which prevents the often unnecessary and expensive replacement of the logic board. I've learned to not glue directly over the pads because there may come a time that you want to replace the wire, and ripping the glue off usually takes the pad with it. Maybe I don't even need to be directing this to you, but I will offer it to whoever is reading.
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09-11-2008, 02:39 AM
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Head-Fi'er
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Join Date: Jul 2008
Posts: 52
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Thanks.
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09-15-2008, 06:29 AM
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100+ Head-Fi'er
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Join Date: Jan 2008
Location: Costa Rica
Posts: 490
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It would be great to see this mod applied to the iPod Touch... I wonder wich one would be better for this, the 1st or the 2nd gen one... do you think that this mod is possible for any of these?
__________________
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Thanks for reading!!
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09-15-2008, 09:08 PM
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Headphoneus Supremus
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Join Date: Jul 2006
Location: Edmonton, Alberta
Posts: 1,720
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Ideally, it would be both, but I wouldn't hold my breath on either of them. Remember that this thread is mostly a community effort, so if anyone can help out, that'd be good for everyone.
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09-19-2008, 07:43 PM
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Junior Head-Fi'er
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Join Date: Sep 2008
Location: Austria
Posts: 4
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Hi everybody! 
I have a problem. 
My headphone output of my Ipod Video G5 is damaged. One Chanel seems to be ok, on the other i can't hear anything.
But the Line out at the dock-connector works. I mean that the both channels of the Line-Out work as they should.
But they are very loud and it is no solution for the future. I use rockbox.
I thought that there is an AMP after the DAC, and of this AMP one CH is dead. But i don't know where i find it on the PCB. Is it integrated in the Wolfson?
A big device, i think it is an capacitor or resistor burned.
Does an pic helps you?
Greets from Austria,
Martin
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09-20-2008, 06:10 AM
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Headphoneus Supremus
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Join Date: Jul 2006
Location: Edmonton, Alberta
Posts: 1,720
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The datasheet for all the Wolfsons in the iPods usually recommend a capacitor after the DAC. I haven't seen an amp after the DAC in the 5G, so I think you're wasting your time looking for it. A picture would definitely help, but I think you might need to be replacing some SMD caps. I imagine there would be some form of output current limiting such that the short circuits that happen when you remove the headphone jack would not kill the elements, but maybe there's something else at play here. We had one guy replace the SMD caps on his mini, so maybe that's what you might be looking to do.
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09-20-2008, 12:41 PM
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Junior Head-Fi'er
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Join Date: Sep 2008
Location: Austria
Posts: 4
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Hello and thanks!
Well it was no short circuit with the jack. 12V from an Computer Power Supply damaged following device (don't ask why. I know, i'm an idiot!  ):
 
Is it C146?
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09-20-2008, 04:50 PM
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Headphoneus Supremus
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Join Date: Jul 2006
Location: Edmonton, Alberta
Posts: 1,720
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Yikes, that is pretty nasty. I guess it's time for you to replace both of those capacitors. I suggest getting a few values for those caps partly so you can experiment with the sound, but mainly because in case the situation repeats itself, you can replace it with another. The datasheet lists 220uF, but depending on what the impedance of your headphones are, you may want to tweak that value.
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09-20-2008, 06:12 PM
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Junior Head-Fi'er
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Join Date: Sep 2008
Location: Austria
Posts: 4
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well, thats seems to be great!
I thought that the converter is dead!
Is it an electrolytic capacitor ?
Last edited by zeiner-rider; 09-20-2008 at 06:17 PM.
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09-20-2008, 07:52 PM
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Headphoneus Supremus
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Join Date: Jul 2006
Location: Edmonton, Alberta
Posts: 1,720
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It's not electrolytic; maybe polyester or tantalum. If you're able to listen to music through the line out, then the DAC still works. The headphone jack and line out have the same signal but are processed differently, so the DAC still works if the signal is present in the line out. I wonder how the cap blew up though. Were you listening to especially loud music? 
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09-20-2008, 08:11 PM
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Junior Head-Fi'er
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Join Date: Sep 2008
Location: Austria
Posts: 4
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i was checking a car-amp with the headphone output as signal. Unfortunately i connected the output with Supply Voltage of the amp.
I think there is more dead. I cheked several caps, no one helped.
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09-20-2008, 10:29 PM
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Headphoneus Supremus
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Join Date: Jul 2006
Location: Edmonton, Alberta
Posts: 1,720
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Looks like maybe it's time for a brain transplant.
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09-20-2008, 11:50 PM
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100+ Head-Fi'er
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Join Date: Jan 2008
Location: Costa Rica
Posts: 490
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Hi Joneeboi,
I was watching some pics and it seems that the DAC in the iPod Touch is a WM8758BG, the same one as the 5G iPods.
I wonder if the diyMod would improve the sound as it does with a 5G iPod... If only I could be able to do this... =D
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