mfsop Posted February 13, 2014 Share Posted February 13, 2014 Sorry, if I can't explain this problem all that well because I'm asking this to help a friend. When he touches the record the tonearm starts vibrating and he gets a humming / feedback sound. Apparently, there's a mod that involves changing some resistors which he'd do but he wasn't able to find the actual tutorial - just an article mentioning that one exists... Has anyone of you guys had this problem before? It would really help him, so thanks in advance and all that! Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted February 13, 2014 Share Posted February 13, 2014 Can you post the article that mentions the mod? It might give us a clue. Quote Link to comment Share on other sites More sharing options...
mfsop Posted February 13, 2014 Author Share Posted February 13, 2014 Unfortunately, he's read it on a German web site: http://www.mzee.com/forum/showthread.php?t=90943 The manual might be called "PDX 2000 Vibration Mod" as someone calls it. He talks about removing 6 diodes [??] and replacing 3 820 Ohm-resistors with 3 420 Ohm-resistors.Another guy says that the manual is directly from Vestax. This seems to be the first page of it: PDX-2000Modification ManualFebruary 18, 2003Vestax CorporationDescription:When the platter is pushed down and a fair amount of pressure is applied (during scratch play), the platter may generate a vibration. This problem occurs on units produced in the first few batches.Applicable serial numbers:230V: 07N010201 – 23N380500120V: 07U010401 – 23U380700100V: 07F010001 – 22F370300 Too bad, that the thread is ten years old.. Quote Link to comment Share on other sites More sharing options...
mfsop Posted February 13, 2014 Author Share Posted February 13, 2014 I've found it: http://www.vinylengine.com/library/vestax/pdx-2000.shtml 1. On the main PCB remove: D705, D706, D735, D736, D765, D7662. Replace R709, R739 and R769 (all 820 Ohm) with 470 Ohm resistors [not 420 as I wrote before] No idea, if it works because I don't have that problem but it's an official Vestax manual, so I hope this will help someone in the future. 1 Quote Link to comment Share on other sites More sharing options...
iexist Posted March 18, 2015 Share Posted March 18, 2015 oddly enough, I'm just now noticing this issue with my tables.i'm sure it always occurred, but i was rarely using an analog signal before.. i have yet to discover if this mod is successful or even worth attempting.reached out to a local guy who (i think) repairs tables.. that's probably about as far as i'll get. Quote Link to comment Share on other sites More sharing options...
Dubba Dutchdj Posted March 18, 2015 Share Posted March 18, 2015 Nice one! This fix could bring the studio Pdx shitter back off the subs bench, rock well and I went in on a cheap tatty old 2000 last year and a month or two latter the platter developed a pulsing vibration demoting it to the spare parts pile. Quote Link to comment Share on other sites More sharing options...
DJ Rock Well Posted March 18, 2015 Share Posted March 18, 2015 DV wins again! This could very likely resurrect our old PDX and probably quite a few others I've seen with this issue. Thanks mfsop. Quote Link to comment Share on other sites More sharing options...
Guest Symatic Posted March 18, 2015 Share Posted March 18, 2015 Let me know how you get on guys! I wanna know if the vibrating platter can be fixed too Quote Link to comment Share on other sites More sharing options...
DJ Rock Well Posted March 18, 2015 Share Posted March 18, 2015 Unsurprisingly the resistors sell for peanuts. http://www.amazon.co.uk/gp/aw/d/B001B0ZJXQ/ref=redir_mdp_mobile/276-7515429-0050121 The only question now is how hard the soldering would be. It's times like this I regret that I still haven't bought a decent soldering iron with fine tips and temperature control. Quote Link to comment Share on other sites More sharing options...
Dubba Dutchdj Posted March 18, 2015 Share Posted March 18, 2015 Rasteri - would you be so kind to point us in the direction of a decent soldering iron etc..... for the job in question. Id rather buy the right one first time than waste money on some overpriced shite from our local diy store Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted March 18, 2015 Share Posted March 18, 2015 I've used cheapo shitty soldering irons my entire life, even for doing fine-pitch surface mount work. CPC's where I get all my stuff because they don't charge shipping. I'm currently rocking this one - http://cpc.farnell.com/duratool/d01847-40/iron-soldering-40w/dp/SD01126You'll probably also want some bevel tips if you're doing through-hole work (fine tips are more for surface-mount) - http://cpc.farnell.com/duratool/79-2130/tip-soldering-bevel/dp/SD01130You'll also want a desoldering pump for removing the old component - http://cpc.farnell.com/duratool/zd-208k-87-8282-esd/pump-desoldering-esd/dp/SD01153And some solder - http://cpc.farnell.com/antex/yc00120/solder-lead-free-2m-tube/dp/SD01373Finally don't get the resistors at amazon, they're just over a penny each at CPC - http://cpc.farnell.com/unbranded/mf25-470r/resistor-0-25w-1-470r-pk50/dp/RE03756 There you go, everything you need to do the mod for £8.21 Let me know if you get stuck. EDIT : If you really fancy splashing out these soldering iron stands are £2.20 http://cpc.farnell.com/duratool/d01853/soldering-iron-stand/dp/SD01706- but I just used an old coffee mug for years before I bought mine 2 Quote Link to comment Share on other sites More sharing options...
Dubba Dutchdj Posted March 18, 2015 Share Posted March 18, 2015 Nice! Exactly what I was after, cheers man Quote Link to comment Share on other sites More sharing options...
iexist Posted March 18, 2015 Share Posted March 18, 2015 Keep us posted with your tests and progress. Quote Link to comment Share on other sites More sharing options...
iexist Posted November 9, 2015 Share Posted November 9, 2015 bumping. has anyone been successful with this fix? does every pdx owner have the wobble issue? Quote Link to comment Share on other sites More sharing options...
Guest Symatic Posted November 9, 2015 Share Posted November 9, 2015 all my vestax are solid, i have 2300's and 2000 mk1's. the 2000's occasionally go backwards randomly but only after i have been abusing the platter in some way (a la mixmaster mike ) but I know plenty of people with crazy platters and vibrations going on with 2000's Quote Link to comment Share on other sites More sharing options...
DJ Rock Well Posted November 9, 2015 Share Posted November 9, 2015 There's an old one at the studio that's in need of this (amongst other things), but we've got enough other decks not to bother. My old shitty 2000 would also go backwards sometimes if you used a felt slipmat and no plastic or turned the brake to full sharpness - I did neither and it never happened again. The PDXs I have now have always been rock solid and they even feel a bit nicer than my old scruffy one which clearly had a hard life even before I got it. Quote Link to comment Share on other sites More sharing options...
iexist Posted November 9, 2015 Share Posted November 9, 2015 I've found it: http://www.vinylengine.com/library/vestax/pdx-2000.shtml 1. On the main PCB remove: D705, D706, D735, D736, D765, D7662. Replace R709, R739 and R769 (all 820 Ohm) with 470 Ohm resistors [not 420 as I wrote before] No idea, if it works because I don't have that problem but it's an official Vestax manual, so I hope this will help someone in the future.I guess I just have a hard time understanding how replacing resistors helps with the wobble(s).. i'm no engineer. Quote Link to comment Share on other sites More sharing options...
Guest rasteri Posted November 9, 2015 Share Posted November 9, 2015 I was wondering that too, but presumably impeding the speed of the platter causes the motor control circuitry to become unstable or summink Quote Link to comment Share on other sites More sharing options...
jeljms Posted November 15, 2015 Share Posted November 15, 2015 Does anyone know if this was an issue with the mk2? Quote Link to comment Share on other sites More sharing options...
Guest Symatic Posted November 15, 2015 Share Posted November 15, 2015 i havent seen as many problems on the mkii style decks with the lower platters. The odd bit of crazy motor control maybe but the bigger problem for the newer model was the shape of the platters - some came out proper wonky Quote Link to comment Share on other sites More sharing options...
jeljms Posted November 15, 2015 Share Posted November 15, 2015 (edited) Not meaning to highjack the thread but I'm weighing up buying a pdx 2000 mk1 or mk2 at the moment. Is there a consensus on which is the safer bet? Edited November 15, 2015 by jeljms Quote Link to comment Share on other sites More sharing options...
DJ Rock Well Posted November 17, 2015 Share Posted November 17, 2015 I say MK1... But that's probably just because I've had three with no troubles myself and I've come across a few MK2 with platters like see-saws. Quote Link to comment Share on other sites More sharing options...
Guest Symatic Posted November 17, 2015 Share Posted November 17, 2015 ohhh mass debate o clock! nerd alert! I have a pair of 2300's (with the mkii style platters) and have never had any problems despite maybe once or twice they have done weird backwards shit but only after some pretty brutal platter manipulation.... I have also got a pair of 2000's and they are more susceptible to the weirdness if you try too much mixmastermike style platter off tricks. i've seen a few wobbly platters on modern decks, but the mk1's can have more probs...... I'd say, get either, they have equal pro's and cons really..... I think mkii's might sound nicer but maybe cos i have J shape arms (the short tone arms sound like gash) Quote Link to comment Share on other sites More sharing options...
DJ Rock Well Posted November 17, 2015 Share Posted November 17, 2015 Yeah, I think it's the arms not the platters for that issue. Either way, on the secondhand market I think it's a bit of a gamble if you're buying them blind. I reckon don't pay too much for them and if they're shit when they turn up, sell them on or send them back... or blame a courier for ruining them en route? Quote Link to comment Share on other sites More sharing options...
jeljms Posted November 17, 2015 Share Posted November 17, 2015 Thanks for the knowledge. Yeah, it always looks like a bit of a lottery with them but I think I'll go for a mk 1, only because they tend to be a bit cheaper on ebay and I like the look of them more than the mk2. But I won't spend more than £100 on one, which seems to be about the going rate. Quote Link to comment Share on other sites More sharing options...
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