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Post by fatgaz on Jun 26, 2008 15:46:05 GMT
Hi,
I've noticed a few X-ray v8 cd players going cheap recently - but without the PSU.
so, what does the X-ray V8 need ? MF are totally silent regarding the PSU requirements - (in typical marketing bollox fashion).
can any one measure the outputs from thier triple X PSU or from their X-DAC V8 ? it's not even clear if there are AC or DC voltages.
cheers all !
Gareth.
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XTRProf
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Pssst ! Got any spare capacitors ?
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Post by XTRProf on Jun 27, 2008 10:23:19 GMT
Yup, expect not much help from MF after you have bought the product as what I had experienced.
Chances are high it's on ac 12-0-12 VAC with at least 500ma. Hopes this will give you some guidance until you have found the truth!
Mike, the owner of this site, will be the best person to ask as he has connection with some MF internal staffs. Oh, ya, Sol's father will also be able to help as I believe he owns one.
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Post by fatgaz on Jun 27, 2008 19:54:48 GMT
Yup, expect not much help from MF after you have bought the product as what I had experienced. I have spoke with the tech support a while ago, and it was a fairly helpful chap. I've never asked for a schematic/service manual from them however. Rotel ( or thier UK distributer?) on the other hand have been brilliant in the past - have emailed me a service manual for my power amp and have sent me a spare part for my cd player free. I noticed that they have done this with some of the old tube shaped X units, i think that this is also what the little pinky PSU are ? I think I'll get half the answer from some body measuring their own units voltages - but i'll not know the required current draw without someone actually measuring it (which is less easy) or if i ask MF themselves. Regarding inside MF info - I believe that there will be another headphone amp due from MF in the near-ish future... maybe an announcement before X-mas. |
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Sol
100+
loves motorcycles !
Chief Technical Numpty
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Post by Sol on Jun 27, 2008 21:10:43 GMT
Oh, ya, Sol's father will also be able to help as I believe he owns one. He does indeed .. but the chances of me heading 300 miles north to pop in and measure are nil, and even if we were going North in the near future, the chance of me remembering to take a multimetre are slim to middling - I normally forget one fo the following list, so don't hold your bretah I'll remeber a multimetre! a) toothbrush b) enough underwear c) oil check car d) daughter's peejays e) ripped music I promised my father about an hour before leaving |
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XTRProf
Fully Modded
Pssst ! Got any spare capacitors ?
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Post by XTRProf on Jun 28, 2008 3:02:55 GMT
Yup, expect not much help from MF after you have bought the product as what I had experienced. I have spoke with the tech support a while ago, and it was a fairly helpful chap. I've never asked for a schematic/service manual from them however. Rotel ( or thier UK distributer?) on the other hand have been brilliant in the past - have emailed me a service manual for my power amp and have sent me a spare part for my cd player free. Well, not for my case, I had faxed them, since they don't have an email address at their website, regarding my MF X-Dac V3 transformer bust up without success for about 3 times more than 6 months ago. I was so dissappointed that I trall the net on how to service my MF X-Dac PS and found Rockgrotto. After I have got the damn thing up and running, it's a no turning back for me to mode the dac to the fullest with the latest tralling the net for superclocks and super regulators.  Alex, can testify to that how feedup I was then.  Hmm, on a brighter note, I should thank them for making me more determine to mode the dac to present class A stuff. I would have been half hearted without that problem. |
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XTRProf
Fully Modded
Pssst ! Got any spare capacitors ?
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Post by XTRProf on Jun 28, 2008 3:07:17 GMT
Oh, ya, Sol's father will also be able to help as I believe he owns one. He does indeed .. but the chances of me heading 300 miles north to pop in and measure are nil, and even if we were going North in the near future, the chance of me remembering to take a multimetre are slim to middling - I normally forget one fo the following list, so don't hold your bretah I'll remeber a multimetre! a) toothbrush b) enough underwear c) oil check car d) daughter's peejays e) ripped music I promised my father about an hour before leaving Of, if he knows how to use a multimeter, you can phone him up and get a ready answer immediately. I know that is assumption.  |
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Deleted
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Post by Deleted on Jun 28, 2008 3:29:19 GMT
XTRProf
Sol said that "the chance of me remembering to take a multimeter are slim to middling",
so obviously his dad doesn't have one !
SandyK
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Post by fatgaz on Jul 2, 2008 14:12:39 GMT
Yup, expect not much help from MF after you have bought the product as what I had experienced. GRRR..... just spoke with tech suppot at M.F. - bloke was happily telling me about the PSU - mentioned +/- 15 volts and +/-9 volts AC. I then said - sounds like I could make one myself - at which point he clammed up and said - I can give no information regarding modifying our equipment... ARGH !!! how obstructive ! so If any one has any of the PSU units or the DAC - i'd like to know the pin-out for the CD player (5-pin socket) ! Anyhow - it looks like they have just moved the transformers outboard like with other stuff they have made before - so easy peasy to put a transformer in a box ! any help much appreciated ! cheers, Gareth |
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Post by bizzie on Jul 2, 2008 19:49:43 GMT
Hi
I have just tried to take some readings from the dac output all taken open circuit as I couldn't work out how to take them with the Cd plugged in without taking off the top and that would invalidate the warrantee.
pins 1-5=0 vdc 9.87 vac
pins 1-2=5.51 vdc 11.48 vac
pins 2-3=0.25 vdc 16.48 vac
pins 3-4=0.26vdc 16.76 vac
pins 4-5 5.60 vdc 12.31 vac
pins 1-3=5.36 vdc 5.50 vac
pins 3-5= 5.35 vdc 4.96 vac
I find these readings very strange as ther are both AC and DC readings on some of the pins.
pin 3 appears to be 0v
hope this helps
Alec
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Post by fatgaz on Jul 11, 2008 10:48:47 GMT
Hello ! thanks a lot for thaking the time to wave your DVM at your DAC. My electroncs knowledge is just enough to avoid me getting into too much trouble - but it's very limited. Hi I have just tried to take some readings from the dac output all taken open circuit as I couldn't work out how to take them with the Cd plugged in without taking off the top and that would invalidate the warrantee. You could also try to sort out the voltages by measuring the resistance between pins with the dac switched OFF. Then you can try to work out how the transformer secondary coils are connected to the output pins. The winding resistances will be very low, so you might have problems with some meters. The problem with this approach is that MF may have tied the OV together - so you may have the two sets of coils connected together - equivalent to two center tapped windings with thte center tapps connected. err, not immediately obvious to me. they do appear to be broadly symmetrical about pin 3. but I'm not convinced this is 0V. it may be that some pin combinations are connnecting some of the windings together in odd ways via the DVM to give the possibly spurious DC readings. I would also have measured voltage between pin 1 and 4, between pin 5 and 2, and between pins 2, 4. oh, and i'd have measured the voltage between each pin and the case work (the output voltage might be referenced to ground ?) - say a steel screw. Anyhow, I'l have a ponder at lunch. Gareth. |
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Post by fatgaz on Jul 11, 2008 12:50:59 GMT
it may be that some pin combinations are connnecting some of the windings together in odd ways via the DVM to give the possibly spurious DC readings. Anyhow, I'l have a ponder at lunch. having had my curry and a hot cup of tea - the DC readings will be due to using a digital volt meter (dvm) that has got confused when sampling by the AC waveform. your measurements are consistent with +/- 5V on pins 1,5 and +/- 15V on pins 1, 4 with pin 3 common. cool ! thanks again, Gareth. G. |
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Post by bizzie on Jul 11, 2008 18:20:51 GMT
No problem pleased I could help |
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Alex, can testify to that how feedup I was then. 
