CS4397 dac

Hi Iain,

Hold on a mo, it is the pads nearest where its mark U1 on the PCB that has lifted? for the left channel?

If so you can run small wire from the SMD pins on that chip which will do the same job, give me ten minutes and I'll edit the pic to show you which pins to link on that chip for the left channel.

What you then need to do is set your multi meter to continuity and measure from the output socket Left to the linked C6 to be sure it measures continuity.
Does that make sense?

Quote:

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Originally Posted by iihay

Should be ok removing that if I pick up some more braid tomorrow, depends if there is much danger of removing more pads which are then needed! Will I need to link some when it's off?

Actually would cutting the legs be an option here or does the thing need to go back on after?

Cheers

Iain

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Got a pic coming, hold on;) should make it easier for you.
Just as long as its the left channel

This is incase the pads for the left channel are lifted
http://i273.photobucket.com/albums/j...untitled-2.jpg

Splendid that's easy, I'll give that a go. On inspection it looks like my blob on the R channel has linked to a pin as well which I'll have to sort out, bit of a large blob!

Appreciate the help.

Iain

No probs, of course you can easily just cut this chip out and link the appropriate pads, its not needed anyway once the linkings been done

Also if your blob of solder for the right channel touches pin3 or 4 then don't worry about it, the pads go to those pins anyway

Quote:

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Originally Posted by leo

Also if your blob of solder for the right channel touches pin3 or 4 then don't worry about it, the pads go to those pins anyway

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Left it as it is then :) Not having a good day soldering wise, I just lifted the a pad from C6 as well. Fortunately it was still connected so I have linked it out and hope all is ok. The soldering iron is turned off now as I obviously have lost the knack today!

Ordered up some others bits from RS so hopefully will have the DC mod completely by tomorrow.

Thanks for the help

Iain

BTW, are those cap values for the DC mod crtitical, the ones around the chip, or can they be a little higher? I know I have nothing quite that low but I may have a few spare caps in that sort of range.

Iain

150pf is the values that gives best measurements for that particular filter with the 30k's etc, I guess you can try 100pf, I'm not sure how it would sound, may not make a huge difference.
main thing is getting those 4 resistors the same where as in the standard circuit they are way out and don't make sense, I've no idea why they even fitted such values:lol:

Oh 180pf should be ok too

Hi leo , thanks for all the explanations :) sorry for not being able to receive messages, i hope i will soon.