Oh no, the place in Ireland has ran out of these chips, and the other place is selling them for £41 !!
Do you know of anywhere else.
Do you know of anywhere else.
That's a pity. I tried the usual suspects before Donberg.
Still think a donor machine is your best bet.
Is it worth a thread on here asking if anyone has one ?
Still think a donor machine is your best bet.
Is it worth a thread on here asking if anyone has one ?
Typical. isn't it ??
Go out of satellite coverage for a day or so and the thread skips on several pages !!!
If you don't have any luck by next Monday, list the chip numbers you require.
I am sure I have them in my piles of junk boards.
I can have a look on Tuesday / Wednesday.
Andy
.PS... currently at 81 deg 32min North, 06 deg 13 min West
Go out of satellite coverage for a day or so and the thread skips on several pages !!!
If you don't have any luck by next Monday, list the chip numbers you require.
I am sure I have them in my piles of junk boards.
I can have a look on Tuesday / Wednesday.
Andy
.PS... currently at 81 deg 32min North, 06 deg 13 min West
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Can I take you up on that offer anyway, I am in no hurry to be honest,
I would appreciate any help, which I am so humbled by how much I am getting with this problem. I have learnt so much in such a short space of time from you guys, and I am loving every minute of the testing and trial and error process, and how a cd player works, which I thought I knew, um no, I didnt 😱
The main chip I am after at the moment which might be suspect is the DRAM chip
The code on the chip is, to be exact: MN4264P-15 18pin DRAM chip
there is also the filter chip for this but suspect that this is okay, but incase its a: SAA7210P 40 pin chip
I presume that that the other filter and the DAC chip are fine as I ran the offboard DAC check.
If you can have a look next week that would be great, and let me know if you have any and how much you want etc.
Have a great evening, this thread WILL have a happy ending, and I cant wait to get the beauty working. In a few months time, I will back on here wanting to upgrade it, so look out.😀🙄
Andy is going to have a look for me (see thread) next week, which is fantastic 🙂 so hopefully he will have one.
That's brilliant... if you can get hold of the two SAA's as well even better as ultimately your (and anyones) only way "proving" these is by substitution.
So the next question... do you know how to unsolder them neatly using braid ?
So the next question... do you know how to unsolder them neatly using braid ?
So the signal goes through both SAAs before going through the external DAC outputs?
No I am unfamiliar with braid, but anything to make my life easier if I have to desolder a 40pin chip 😱
Mooly has recommended that, if possible, I get both SAA chips.
So the chip list is as follows to keep it clear:
MN4264P-15 18pin DRAM chip
SAA7210P 40 pin chip
SAA7220P/B
Thanks Andy 😀
This stuff,
CHEMTRONICS|40-3-5|SODER-WICK PB FREE SD 2.0MM | CPC
you need a good iron with paradoxically a largish tip that holds the heat.
Braid is pressed on the joint while heating and the solder flows into the braid... it's really quick and easy. Around 2 seconds per joint. The IC should come out undamaged like new.
Worth practicing on anything scrap if you can to get the hang of it. Secret is not to ram the iron in damaging the print... just light pressure and heat.
CHEMTRONICS|40-3-5|SODER-WICK PB FREE SD 2.0MM | CPC
you need a good iron with paradoxically a largish tip that holds the heat.
Braid is pressed on the joint while heating and the solder flows into the braid... it's really quick and easy. Around 2 seconds per joint. The IC should come out undamaged like new.
Worth practicing on anything scrap if you can to get the hang of it. Secret is not to ram the iron in damaging the print... just light pressure and heat.
The signal does "pass through" the SAA's but it's more complicated than that.
If you are really interested then getting some books on the subject is probably best, including how the data is made up and put on the disc.
I spent 3 days at Sony in Thatcham many years ago in the early days of CD where we pulled all the theory apart.
It's a huge subject, and although most of the theory isn't needed to repair the players, it does give a great insight into how it all comes together... and helps with trying to figure where problems may be.
If you are really interested then getting some books on the subject is probably best, including how the data is made up and put on the disc.
I spent 3 days at Sony in Thatcham many years ago in the early days of CD where we pulled all the theory apart.
It's a huge subject, and although most of the theory isn't needed to repair the players, it does give a great insight into how it all comes together... and helps with trying to figure where problems may be.
Might just get a book on the subject, I would like to know more about it, for sure.
Any you recommend?
Any you recommend?
Thats excellent, getting some of that, got nothing planned for the weekend, so I can hone my skills, before attacking the PCB.
This will show you the stuff I use. Although the thread was aimed at surface mount it will give you an idea. Note the large tip in the iron as the braid saps the heat quickly.
http://www.diyaudio.com/forums/parts/127924-working-smd-how-do-without-specialised-tools.html
http://www.diyaudio.com/forums/parts/127924-working-smd-how-do-without-specialised-tools.html
never used that before, looks pretty good, clean which is important I suppose when removing IC's
still got me fingers crossed its, well at least one of the chips. Look forward to hearing from Andy as to the chip availability outcome, hopefully get some results soon, obviously whenever he has time to have a look that is.
well maybe a little 😉.
Desperate to get it working, other half is as well, not that she is into hifi, just bored with me enjoying this whole process, and waffling to her about every step, poor woman
Desperate to get it working, other half is as well, not that she is into hifi, just bored with me enjoying this whole process, and waffling to her about every step, poor woman
Hi All,
I found a board !! I thought I had more than one.
It has the MN4264P-15 but the SAA7220P/A not P/B
They are compatable - the /B has slightly better specs.
I'll remove them over the weekend and send them on Monday.
Andy
.
I found a board !! I thought I had more than one.
It has the MN4264P-15 but the SAA7220P/A not P/B
They are compatable - the /B has slightly better specs.
I'll remove them over the weekend and send them on Monday.
Andy
.
thats fantastic, I will pm you my address, let me know via pm how much you want as well for them.
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