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The Apple diyMod: My Take on the Famous iMod [56k killer] Featuring 3G, 4G, 5G and nano 1G! - Page 199

post #2971 of 2981

I get this from Fiio

 

 

Quote:
 

Dear Duy Dang ,

Thanks for your mail and support to FiiO!

Kindly inform you that, our amps E17, E12 and E11 have no ability to block DC offset from being amped.

We think if you connect your mod ipod to E11, E17 or E12, you will face the risk of damaging amplifier and your headphone. We don't suggest to do so.


If you have any other question, please feel free to contact us!
Have a nice day! ^_^

Best Regards,
FiiO Customer Service

 

 

post #2972 of 2981
Hmm, that's odd. Never had a problem with my iMod and E17 with no caps.

On the other hand, here is my setup lately due to the long drives.

jatameja.jpg

Sent from my SGH-I897 using Tapatalk
post #2973 of 2981

Actually I'm confused too. I think may be the DC offset is not existed the output but maybe the Fiio customer service does not recommend for some dc offset existed in the input. If the DC offset is too large, maybe the amp cannot block the DC offset and make harm on the amp or the headphone.

 

Finally I will order Leckerton UHA-6S.MKII amp. It seems to be a great amp and it offers opamp rolling ability, which is very interesting.

post #2974 of 2981

Hi all

i have nawbie question 

all is in that ilustration (this link)

i know whats parts i must desolder from logic board, but i dont now one thing

Caps is polar. have negative and positive side and where is + and - on the logic board of my ipod

Thanks for all response and sory for my bad english xD
 

post #2975 of 2981

what place of ipod is psoitive and what place is negative

when i want solder the caps i need taht info xD

thanks for all response

post #2976 of 2981
Quote:
Originally Posted by DziwnyAdam View Post
 

Hi all

i have nawbie question 

all is in that ilustration (this link)

i know whats parts i must desolder from logic board, but i dont now one thing

Caps is polar. have negative and positive side and where is + and - on the logic board of my ipod

Thanks for all response and sory for my bad english xD
 

 

 

Quote:
Originally Posted by DziwnyAdam View Post
 

what place of ipod is psoitive and what place is negative

when i want solder the caps i need taht info xD

thanks for all response

 

Hi There,

Welcome to Head-Fi. Sorry about your wallet. :D

 

The positive (longer) lead goes to the DAC, negative to the output. 

post #2977 of 2981

Working on the 5.5 G

I lifted the caps on one of the Zcaps spot. I was wondering what Pin outs on the Wolfson Dac these two connect to.

I have seen a sloppy picture of the dac with 2 wires connected, but I can't tell wich pins to connect to.

post #2978 of 2981
Quote:
Originally Posted by Alterlvian View Post

Working on the 5.5 G
I lifted the caps on one of the Zcaps spot. I was wondering what Pin outs on the Wolfson Dac these two connect to.
I have seen a sloppy picture of the dac with 2 wires connected, but I can't tell wich pins to connect to.

Here's a download link to the WM8758 data sheet. See page 4 for a pin out. If I recall, it's LOUT2 and ROUT2. I don't have an iPod board in front of me, but I'm preeeeety sure that's correct. Verify with a multimeter though. I'll double check and update this post shortly

http://www.wolfsonmicro.com/documents/uploads/data_sheets/en/WM8758B_1.pdf
post #2979 of 2981

Thanks for the Info. I find the right channel is Right Pad. That is the one I lifted.


Edited by Alterlvian - 4/17/14 at 4:55am
post #2980 of 2981
Quote:
Originally Posted by Alterlvian View Post

Thanks for the Info. I find the right channel is Right Pad. That is the one I lifted.

I just double checked this morning. Verified ROUT2 you need for the right pad. It's the second pin from left, on the side of the chip facing the "z" cap pads. Very small spot to solder but not impossible. Good luck!
post #2981 of 2981

Impressed with the sound of my Ipod video after this mod, I am currently using a Epiphany Acoustics EHP-O2 with it. No caps are needed with this great little amp. 

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