hey, have bought new cdj 850ks and a djm 850k setup. i noticed that i was getting very strong some actually painful shocks whenever my hand came into contact with the headphone socket, any screws on the faceplate and the pack panel was painful to touch even waving my had around there i could feel a charge. this would happen no matter which cdj i plugged in (even one by one), which power outlet i tried around the house and which power cables and power boards i tried using. ialso tried flipping the cdj figure 8 power cables around which made no difference. pls note im in aus.
i then exchanged my mixer for another one and the shocks appeared to be apparently gone. i also had moved my sub and speakers away from the equip and power board. a day later i put my sub and speakers where they used to be an noticed that again similar yet milder shocks we back. and now they still stay even after moving it to another outlet, board and location.
iv never had this problem with a cdj-2000 and djm-2000 setup i had which i kept in the same location in the previous years for a period of 2 yrs, including the speakers and sub.
what should i do now?
ps iv also had djm 800 and turntables attached back in the day and even they didnt do this.
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@gavin >so basically, can i get permission and have my mixer organised to be replaced or upgraded to have a ground plug? if that is not possible can i have my entire setup refunded? ps i opened this thread in early june, its now late november, i cant keep waiting 2 months for a reply each time.
It's just a static buildup, the cabinet of the CDJs are made from plastic, if you're moving about a lot (which DJs tend to do!), you, and parts of your CDJ can build up a static charge. When you touch the metal parts of say the mixer, you are allowing this buildup to earth through you.
The mixer and CDJs are double insulated (box in a box logo somewhere on the unit) and so have no connection to earth, they are 'floating'. They are earthed to each other through the outer connection of any RCA type cables. So they are all at the same potential, but not connected to earth. One of the reasons Pioneer don't earth the equipment is to prevent 'earth loops', where a hum can occur from an endless loop caused by each deck being earthed, and also earthed to each other through the outer RCA connection, or misuse of the grounding posts for older turntables which don't earth down the outer pin of a Phono cable.
It's perfectly normal, you may find the same happens when sitting on plastic garden furniture and then you touch something metal. Or getting out of a car and then touching the metal door.
Environmental conditions can effect the severity of the shocks, from the weather, clothes/shoes you wear, to what the decks are standing on. You could probably try an anti-static wrist grounding strap around your ankle or something if it bothers you. Or, you may find that earthing the mixer in some way may also prevent the buildup.
lol i know what static is and static would be a small instantaneous charge. The current i get is continuous no matter how long i touch it for and it happens any time i come into contact with screws or metal parts of the mixer. and it is continuous for weeks. i have confirmed it happens only during periods of high humidity or weeks where there has been a day of rainfall here or there. we had a drought, and absence of rain for 2 and a half months and guess what, no currents during that period.
the funny thing is that the US models have a ground because of the regulations in the country. Wonder if people run into earth hums or grounds loops there often.
Like iv said, my old grounded cdj-2000 djm-2000 no issues, neither did the djm-800 and cdj 1000s
ps still waiting of word from either gavin or pulse, cheers.
Firstly, thanks for laughing at my reply, when I'm actually giving up my own time to try and help you. Secondly, if what you're feeling is continuous, it's fairly normal to get this on double insulated equipment as they have no connection to earth, thus a potential difference can build up between the item and earth. Search for 'tingle dvd player' or something on Google.
Your equipment has no built-in precipitation or humidity sensor, it doesn't decide to electrocute you only when it's raining, but when it is humid the whole system of you, your clothes, the floor you're standing on and your house, not to mention the soil around your house (which is how a connection to earth is made) are all better conductors, this could well be enough to make the difference and allow any buildup to find a path to earth through you.
To my knowledge, no CDJ-1000 was ever earthed, in any market, they all had a two-pin Live and Neutral connection only. European models of the DJM-800 and DJM-2000 are also not earthed, as it is simply not required under CE type approval (save cost), and also prevents the possibility of earth loops being created.
I'm not an expert on US type approval under the UL standards, but I'm guessing they require an earth if the item is largely of metal construction (which DJM mixers are, CDJs are in a plastic cabinet).
If you are concerned about the safety of your equipment, then I suggest you have a Portable Appliance Test carried out on it, which will check for insulation leakage, but I'm 99.99% certain it will pass without any problems.
If this feeling still bothers you, then I suggest you earth the mixer, you can probably purchase earth break-out plugs which you can plug into your mains socket which connects to its earth pin, connect the other end to the ground post or outer (ground) connection on a spare RCA socket on your mixer. Or use a crocodile clip and attach it to a nearby domestic heating pipe, which should also all be earthed. This will dissipate any buildup straight to earth, instead of finding a path to earth through you.
Firstly, Sorry i did not mean to offend u! i was amused that my thread was't properly read or the point about the tingle was missed, iv have tried to be very detailed in trying to explain what the effect i was getting, so my apologies if i came out as seeming offensive!
I understand why this is occurring because the mixer isnt earthed. i know the cdjs are never earthed but my last mixers have always had an earth. When i asked about it i was told the tingling should not be happening.
Im not an engineer, however i have to say that, during dry conditions there is no shock howver, days of high humidity i do get the tingle. So the humidiy definaly is affecting the device. I have also experimented with this a a different location other than my house. Same behavior!
I would love it if i could actulay return mine to pioneer to get a mixer of the same model that has an earth, or actualy have my psu upgraded/changed in my mixer to include an earth. So far no response.
The tingling can be quite strong sometimes so it is very unpleasant especially during initial contact. Btw thanks for your help. Could u recommend me a 'earth break-our plug' so i can ground my mixer? and are they safe?
thanks again! much appreciated.
That's OK, I'm in the UK so not entirely familiar with the pin arrangement of Australian mains plugs and sockets, basically, you could just get a mains plug and ONLY wire the earth pin up, and connect this earth wire to the chassis (ground post would work) of the mixer (get a qualified electrician to do this for you).
You can probably also buy a dummy (earth bonding) plug which only has an earth pin (the live and neutral pins will be plastic), these are normally used for ESD protection for use with wrist straps, anti-static mats etc, search for earth bonding plug on eBay or the like in your region, but these have a 1 million ohm resistor built in to slowly dissipate large voltages of static, but prevent lower mains voltages from flowing to earth for the wearers safety.
Basically, you need to get the currently floating chassis of your mixer to be electrically connected to the earth. The US versions which use a 3-pin IEC cable instead of a 2-pin IEC cable just have this done internally. A wire connected to the third (earth) pin is simply screwed to the metal chassis internally.
There are various design pros and cons to having them floating, or earthed, but neither should really cause a problem. You can search WikiPedia for 'Floating Ground' which briefly details the issues regarding ground loops.
hey thanks so much man! i thought id replied to ur last message ages ago, looks like it didnt send so sorry for the lateness of getting my reply to u.
everything uv said here makes alot of sense and is very helpful :)
i do have one question tho, the earth boding plug should do the job yeah? iv seen plenty around but all uk models. since is connecting to the ground only (bottom plug same as aus) then should i be able to just use that have a uk to aus power adapter so it fits into the aus mains wall? im assuming this is fine cos its just ground plug the rest are dummys.
also do i need to wear a wrist strap to use it or do i just connect it to my mixer ground post?
heres what iv found so far:
http://www.maplin.co.uk/p/anti-static-earth-bonding-plug-as38r
thanks heaps for ur help!
They are earth bonding plugs for ESD protection, as they have a built in 1M ohm resistor, and are used for anti-static wrist straps and mats etc. It may help, although ideally you just want a straight connection between the chassis of the mixer and earth without any resistance.
I'm not familiar with the Australian mains sockets, but I'd just buy an Australian mains plug (the type which you wire yourself) and only wire the earth connection, connect the other end of this earth wire to the GND socket (or some part of the metal cabinet) on the mixer. But please make sure this is done correctly, get a qualified electrician to do this for you if you are at all unsure in anyway.
thanks man. i was wondering, if i connect something to my mixer that is already grounded to the wall eg speakers, would that also ground my system??
Okay, just following up on some dormant threads / tickets - is this still an issue?
Marking as closed due to inactivity. If anyone has a related problem, please start a new topic and link to this thread.