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The Apple diyMod: My Take on the Famous iMod [56k killer] Featuring 3G, 4G, 5G and nano 1G! - Page 93

post #1381 of 2487
9/10/08 at 6:32pm
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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Gear mentioned in this thread:

Apple 30 GB iPod with Video Playback Black (5th Generation)
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iPod Nano Headset Music Player
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Apple iPod classic 160 GB Black (6th Generation) OLD MODEL
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post #1382 of 2487
9/10/08 at 8:07pm
Quote:
Originally Posted by mbarry View Post
Which side goes first? The Neg or Pos?
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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post #1383 of 2487
9/10/08 at 9:41pm
Thread Starter 
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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post #1384 of 2487
9/10/08 at 10:39pm
Thanks.
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post #1385 of 2487
9/15/08 at 2:29am
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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post #1386 of 2487
9/15/08 at 5:08pm
Thread Starter 
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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post #1387 of 2487
9/19/08 at 3:43pm
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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post #1388 of 2487
9/20/08 at 2:10am
Thread Starter 
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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post #1389 of 2487
9/20/08 at 8:41am
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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post #1390 of 2487
9/20/08 at 12:50pm
Thread Starter 
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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post #1391 of 2487
9/20/08 at 2:12pm
well, thats seems to be great!
I thought that the converter is dead!

Is it an electrolytic capacitor ?
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post #1392 of 2487
9/20/08 at 3:52pm
Thread Starter 
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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post #1393 of 2487
9/20/08 at 4:11pm
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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post #1394 of 2487
9/20/08 at 6:29pm
Thread Starter 
Looks like maybe it's time for a brain transplant.
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post #1395 of 2487
9/20/08 at 7:50pm
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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Gear mentioned in this thread:

Apple 30 GB iPod with Video Playback Black (5th Generation)
$509.22 at
See it »
iPod Nano Headset Music Player
$11.24 at
See it »
Apple iPod classic 160 GB Black (6th Generation) OLD MODEL
$309.99 at
See it »
Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › The Apple diyMod: My Take on the Famous iMod [56k killer] Featuring 3G, 4G, 5G and nano 1G!