Hi all. 🙂
I have a cd player that uses the pcm1716 dac and I thought that maybe it could use a better chip to achieve better sound. I found the wolfson wm8717 and wm8740 as a pin by pin replacements, and I would like to know if it is a good idea to replace the pcm1716 with the wm8740.
Here is a link to the wm8740 specs -> http://www.wolfsonmicro.com/product.asp?pid=7
And this links to the pcm1716 .. -> http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=PCM1716
if anyone has a better replacement chip idea… let me know…
thanks
m.
I have a cd player that uses the pcm1716 dac and I thought that maybe it could use a better chip to achieve better sound. I found the wolfson wm8717 and wm8740 as a pin by pin replacements, and I would like to know if it is a good idea to replace the pcm1716 with the wm8740.
Here is a link to the wm8740 specs -> http://www.wolfsonmicro.com/product.asp?pid=7
And this links to the pcm1716 .. -> http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=PCM1716
if anyone has a better replacement chip idea… let me know…
thanks
m.
actually...I made a typo or two ... 😱
the replacement would be the wm8716 replacing the pcm1716....
wn7816 info -> http://www.wolfsonmicro.com/product.asp?pid=3
m. 🙂
the replacement would be the wm8716 replacing the pcm1716....
wn7816 info -> http://www.wolfsonmicro.com/product.asp?pid=3
m. 🙂
Hi mekanoplastik
did you manage to swap the 1716 for the 8716.?Was thinking of trying it in my Pioneer 717 dvd player
Smiffy
did you manage to swap the 1716 for the 8716.?Was thinking of trying it in my Pioneer 717 dvd player
Smiffy
Haven't got the bits yet,specs look better than 1716 but i think i may be pushing my luck a bit on the soldering skills.should be able to put them on,its getting the old 1716s off thats worrying me.seems a bit more complicated than swapping the 5532s for AD8620s was.
Smiffy
Smiffy
There is a WIKI page for SMD soldering and desoldering where it is described how you could do it. Seems like it is not impossible at least. Please report the results i have a PDS507 that sounds like crap and i want to fix it, have replaced opamps and fiddled with the supply with good results but still not really enjoyable.
Does anyone have a feel for if the wolfson DAC's sound good?
Does anyone have a feel for if the wolfson DAC's sound good?
Does anyone know how high much dc on the output i can get away with.The amp has an input cap,(MF F16)At the mo i am measuring 3-6mv at the input of the final caps.If poss i would like to pull them out as even the best cap in the world isn't as good as no cap at all.
Ta for any help
Smiffy
Ta for any help
Smiffy
Should be fine i think.
Depends a bit on where the input cap on the amp is located. If it is after the input selector you could get a bang when switching source, especially at high volume.
Do remember that you might have offset on the output if you ever change amp later.
Depends a bit on where the input cap on the amp is located. If it is after the input selector you could get a bang when switching source, especially at high volume.
Do remember that you might have offset on the output if you ever change amp later.
Hi Hjelm
Ta for assistance
not quite sure about some of these things so better safe than sorry
No input selector as straight power amp(although 2 way selector in me pot in a box so maybe same thing),first thing on input of amp is a 1uf cap which seems a low value.
Smiffy
Ta for assistance
not quite sure about some of these things so better safe than sorry
No input selector as straight power amp(although 2 way selector in me pot in a box so maybe same thing),first thing on input of amp is a 1uf cap which seems a low value.
Smiffy
Yes if you switch that one to another source it could make a noise, could be ok but sometimes you forget to lower the volume and get a suprise.
It is not the voltage that decides if a 1uf cap is enough, not too unusual that they are rated some hundred volts so that way it is fine.
If the amp has a too low input impedance though then it might be a problem with bas reproduction but since the manufacturer has placed it there it should be sufficient.
Smiffy,
I have replied to your pm and I would be happy to provide some phone support (to lazy to type), or better still if you can get here (south of Doncaster) I would be happy to spare you a beer and a go with various professional smt rework toys.
You may find the following finds useful.
http://www.diyaudio.com/wiki/index.php?page=SurfaceMountDeviceRework
http://www.usbmicro.com/odn/documents/46.html
Or if you are interested in investment (it will be necessary in time)
search the common online auctions for example “rework”.
I have replied to your pm and I would be happy to provide some phone support (to lazy to type), or better still if you can get here (south of Doncaster) I would be happy to spare you a beer and a go with various professional smt rework toys.
You may find the following finds useful.
http://www.diyaudio.com/wiki/index.php?page=SurfaceMountDeviceRework
http://www.usbmicro.com/odn/documents/46.html
Or if you are interested in investment (it will be necessary in time)
search the common online auctions for example “rework”.I can confirm wm8716 working nicely inside CDJ1000mk3. Remove the passives around it first maybe and then put em back after replacing the chip.