tj187 Posted November 6, 2015 Share Posted November 6, 2015 We moved into a new house. In our apt my setup worked fine. Rega RP1 and Cambridge Audio 640P amp. I've troubleshooted as much as I know how, I've plugged the TT directly into the receiver and it works, just very quietly as expected. I've switched out the cable between the preamp and receiver and still no sound. I feel like it must be the preamp. Does anyone have any idea why it would all of a sudden stop working? Quote Link to comment Share on other sites More sharing options...
Tardcore Posted November 6, 2015 Share Posted November 6, 2015 Have you tried moving back to the old apartment? slinch, Papercup, Klefki and 1 other 4 Quote Link to comment Share on other sites More sharing options...
tj187 Posted November 6, 2015 Author Share Posted November 6, 2015 Not yet, thanks for the help though. Quote Link to comment Share on other sites More sharing options...
A-Bon Posted November 6, 2015 Share Posted November 6, 2015 sounds like you have tried most things... so its most likely a broken or dry joint somewhere inside the box... especially if it copped a knock during the move... it would need to be opened up by a sparky or taken to a repair center Quote Link to comment Share on other sites More sharing options...
slinch Posted November 6, 2015 Share Posted November 6, 2015 - Did you maybe unintentionally switch the phono and turntable power supplies? Not sure if they have different voltages, but if they do it might result in one piece working (though not without high risk) and not the other. - Did you maybe flip the MM/MC switch on the back? - Did you make sure that you used the right inputs and outputs on the phono ("output" for phono-receiver connection and "input" for table-phono connection)? - Did you try using a different input on the receiver to hook up the 640p to? - Did you throw it down the stairs and later forgot about it? It's very rare that a phono stage would just stop working completely out of the blue. OR due to moving. Quote Link to comment Share on other sites More sharing options...
tj187 Posted November 6, 2015 Author Share Posted November 6, 2015 My *blonde* wife (what have I gotten myself into), just told me there were 4 power cables that all looked the same and we only needed 3 so she threw one away. I tried the other 2. Is it possible for a preamp to be plugged in, lit up and looks like it's working while not being able to function? I do not have the 4th power cable so I cannot compare the specs to it. Quote Link to comment Share on other sites More sharing options...
tj187 Posted November 6, 2015 Author Share Posted November 6, 2015 I have used different inputs. If anyone has the same pre-amp maybe they can tell me what power cord specs are? Thank you, also Quote Link to comment Share on other sites More sharing options...
slinch Posted November 6, 2015 Share Posted November 6, 2015 I have used different inputs. If anyone has the same pre-amp maybe they can tell me what power cord specs are? Thank you, also It's written on the back of the phono. 12V, 0.5A Quote Link to comment Share on other sites More sharing options...
tj187 Posted November 6, 2015 Author Share Posted November 6, 2015 The cord I have now plugged in is 12V 1.5 A. And none of the others match that exactly. I don't know if more should be able to handle it or no, I don't anything about it. I will try ordering a cord with the same specs. Thank you Quote Link to comment Share on other sites More sharing options...
slinch Posted November 6, 2015 Share Posted November 6, 2015 Do check the specs on the back of your unit though, maybe they are different between EU and US versions. I just googled the image. Either way, higher current isn't a problem and the unit should still work, so the issue has to lie somewhere else. Did you check all other options I posted? Quote Link to comment Share on other sites More sharing options...
tj187 Posted November 6, 2015 Author Share Posted November 6, 2015 Yea, all of the other options are good. And I moved all the TT in the backseat of the car. hoping this wouldn't happen. Do you think the 1.5 Amp power cord is not the problem? Quote Link to comment Share on other sites More sharing options...
Tardcore Posted November 6, 2015 Share Posted November 6, 2015 Guys. I think there's an avenue yet to be explored here. just sayin'. Quote Link to comment Share on other sites More sharing options...
youspinmeround Posted November 6, 2015 Share Posted November 6, 2015 My *blonde* wife (what have I gotten myself into), With an attitude like that, I think Karma destroyed your box HxChile_ 1 Quote Link to comment Share on other sites More sharing options...
tj187 Posted November 6, 2015 Author Share Posted November 6, 2015 Just jokes, my lovely* wife haha Thanks for trying to help everyone, I wanted to make sure I wasn't overlooking something obvious, I guess I will take it in somewhere. Quote Link to comment Share on other sites More sharing options...
xxmartinxx Posted November 6, 2015 Share Posted November 6, 2015 It's possible that you blew something in the unit when plugging in the wrong amperage ac adapter. I would email Cambridge and see what they have to say about the ac adapter. Quote Link to comment Share on other sites More sharing options...
slinch Posted November 6, 2015 Share Posted November 6, 2015 It's possible that you blew something in the unit when plugging in the wrong amperage ac adapter. I would email Cambridge and see what they have to say about the ac adapter. Higher current won't hurt the equipment. The phono stage will only use as much as it needs. Higher voltage on the other hand would be a bad idea, if the unit doesn't have a proper voltage regulator. Quote Link to comment Share on other sites More sharing options...
allenh Posted November 6, 2015 Share Posted November 6, 2015 The Cambridge adaptor is AC to AC and I'll bet everything else is AC to DC, the Cambridge one is the one you need to get right The Cambridge adaptor is just a transformer in a box with all the regulation and rectification going on inside the 640P but with the exception of a few of the Project turntables and components everything else will have an AC to DC adaptor with the rectification and if you're lucky the regulation going on inside the adaptor. The output symbol on the Cambridge one will be ~ and the others will have a horizontal line with a dashed line above it. Quote Link to comment Share on other sites More sharing options...
tj187 Posted November 6, 2015 Author Share Posted November 6, 2015 Good stuff, thanks I will check that out after work. Quote Link to comment Share on other sites More sharing options...
tj187 Posted November 6, 2015 Author Share Posted November 6, 2015 I think that must be it, none have the ~ on them. That was exactly the type of thing I wouldve never been able to figure out, thank you for your help. I am having trouble finding one to buy with those specs though. Any chance you could link me to one? Much thanks again Quote Link to comment Share on other sites More sharing options...
tj187 Posted November 6, 2015 Author Share Posted November 6, 2015 This is the closest I could find, but does not give the amperage, if you think that would work https://www.savingology.com/ProductDetails.asp?ProductCode=Adapter-ZS-XN30-ZSXN30-S2-EGR&click=2&gclid=CjwKEAiAvPGxBRCH3YCgpdbCtmYSJABqHRVwgH25zJr4DSZrBNo6TxzN7lUWC1zSjdcI8_7KLpjNxRoCiAPw_wcB Quote Link to comment Share on other sites More sharing options...
xxsilence Posted November 6, 2015 Share Posted November 6, 2015 Have you tried just contacting Cambridge or a local distributor to see if they can sell you one or just...give you one? Shouldn't be too much of a hassle. Easier than trying to spec it properly online I would think. Quote Link to comment Share on other sites More sharing options...
tj187 Posted November 7, 2015 Author Share Posted November 7, 2015 I did. I decided that was the best way to go about it. I will post back if it works for other people who might unfortunately have this problem in the future. I don't want to sound like an ass either, but to everyone that just chipped in with a unhelpful comment...that is not what this is about. Take it to a Brand New thread or something. I've been around here for a while...you can check my member date. Was just looking for some help. Thank you to everyone that was helpful, extremely appreciate it! Quote Link to comment Share on other sites More sharing options...
allenh Posted November 7, 2015 Share Posted November 7, 2015 Because the Cambridge uses an AC to AC adaptor you don't need to worry about it's current or VA rating so much, as long as it's 12V and it's current rating is higher than the original one you will be fine. Obviously you don't need an enormous one and the original transformers VA rating will probably be 6VA (0.5A X 12V) so as long as you are over that you are fine If you're feeling technical you could just buy a 10 or 20VA toroidal transformer from ebay or someone like Digikey and put it in a box and that would be an upgrade over the original. tj187 1 Quote Link to comment Share on other sites More sharing options...
tj187 Posted November 8, 2015 Author Share Posted November 8, 2015 Thanks, man. You are awesome Quote Link to comment Share on other sites More sharing options...
xxmartinxx Posted November 9, 2015 Share Posted November 9, 2015 Higher current won't hurt the equipment. The phono stage will only use as much as it needs. Higher voltage on the other hand would be a bad idea, if the unit doesn't have a proper voltage regulator. If the power supply is regulated, it should be fine, however, if it's unregulated, the voltage may fluctuate due to the access amps. The voltage could have also dipped, which might account for why the LED lights up, but the doesn't pass signal. This should be the take away from this: POWER ADAPTERS ARE NOT UNIVERSAL! Other than just the amps and volts, there are differences in polarity, design, and connection type that could harm your electronics. Quote Link to comment Share on other sites More sharing options...
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