Tech 1200 mk2 - really bad buzzing, VERY low sound from record
I bought this deck cheap, it had really bad buzzing (i already replaced the RCA's, the ground...i also had to replace the spindle) i've tried new cartrides, different channels on my mixer(every other deck i try it works great). I'm at a bit of a loss here, I was just wondering if there is a good trouble shooting manual around for these. I don't want to get into replacing the tone arm or something if thats not the problem. I've also tried different power outlets. Everything is pointing towards the deck, but i'm not too sure what is wrong. Any of you have any ideas?
Re: tech 1200 mk2 - really bad buzzing, VERY low sound...
If you've had it open to replace the RCAs you're obviously alright with a screw driver. with some concentration the arm is not that hard to remove and reassemble etc.You might as well try to look at the state of the wiring in the one you already have, if you are going to consider replacing it. You have to pull out the old one anyway if you are going to replace it, and once it is out its not hard at all to unscrew the metal s part of the tonearm from the plastic part at the gimbal and then have a look at the state of the black earth wire screw connection. But before you go to all the trouble, check the state of the bearings in the gimball - if some idiot has overtightened them then you may be in some trouble because they are easily damaged that way. just have a careful wriggle to see if there is any play. beyond that, if the arm has really been abused then the silver plastic at the gimball can be cracked, but that maybe hard to see until you remove it. If all that is ok, then There is nothing apart from wiring that can be an issue here - and that is user servicable - corrosion at the earth screw connection in the arm, issues with the connections to the little circuit board where the wiring from the arm attatches to the rcas etc. You have very little to loose in trying to fix what you already have.
An expert who has achieved level 2 by getting 100 points
An expert that got 10 achievements.
An expert that got 5 achievements.
An expert whose answer got voted for 100 times.
Re: tech 1200 mk2 - really bad buzzing, VERY low sound...
Well, if you already replaced the RCA cables, the only other issue will be either your tonearm, or your cartridge.
If I was to guess, I would say you have a bad tonearm. Only because you've done everything else, and the issue still persists. You will have to replace the tonearm, as there are no user serviceable parts for the tonearm. There is very thin ground wire that comes from the tonearm, which is inside the tube, but to get to this is extremely difficult, and not worth the time and effort. It's easier to replace.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Unless you are connecting to a different amplifier and the sound is low on that, the likely cause is the pre-amp of the amplifier. Since the record deck uses a separate pre-amp on your amp it won't affect the other functions. You can confirm that it's gone by removing the wires from the cartridge. With the amp on and deck still connected touch the wires with your finger. If there is only a small buzz from two of the wires, this will confirm the pre-amp is the problem. However if you hear a loud buzz from them, the cartridge is faulty.
If you have knowledge of electronics you can trace the pre-amp inside the amp. It's probably a small IC that has gone, which if you can get the replacement part should cure the problem.
If you are connecting the deck to another amp, then that amp might not have a Magnetic Cartridge Pre-amp built in, but you can buy these separately.
well" for a start, they need to go into a phono socket, this amplifies them. i take it you bought 2 decks with the intentions of mixing, so you gonna need a mixer. MIXER & DECKS SET UP: 1.decks into phono channels 1&2 2. black GROUND wires, go to GND screw on back of mixer 3. RCA master / booth Outputs on mixer to AUX / LINE-IN on amp.(not phono)
You need to check that the signal is getting to the amp. This can be done by removing the wires off the cartridge for the left and right channels. With the amp on touch the ends of the wires. If you hear a buzz the signal is getting to the amp and the cartridge is dead, but if you hear nothing and if the wiring is as you say good. Then the pre-amp in your amp for the cartridge has failed. This pre-amp will only affect the record deck and no other functions. If it has gone you can trace the wires from the sockets to it. Sometimes it will be on a seperate PC board. It's often a single IC that has failed. If you can replace it yourself be careful with the new one as these are often static sensitive chips.
PS the phono scokets on the amp sometimes buzz if you pull the plugs in & out!
Try plugging it into a different power point. The problem is with the power supply fluctuating. You can eliminate that with a UPS, here is a link to wiki http://en.wikipedia.org/wiki/Uninterruptible_power_supply
And it will be. I can almost steak my life on it. Easy to replace. Most djs had to already. Most off us went to Radio Shack and bought the 6 foot gold RCA's and cut them in half for both decks. Its not that hard to do. Any problems message me.
It is not suggested that you remove the ground cable. Performing the mod for the ground by soldering a bridge on the circuit board doesn't really do anything either than remove that buzz/ground hum. You've essentially removed the wire that grounds the turntable cabinet to the earth. The buzz is gone, but now your turntable is no longer grounded properly.
I would suggest replacing the ground cable to it's original state, then attach the Monster cables.
If this does not work, then either there is an issue with the soldering to the board, or the board itself might be damaged. You might want to look at the trace paths to make sure none are lifted, or damaged in any way on the board. Another issue might be faulty tonearm wires or not properly soldered wires.
FYI, monster cables are not good for this purpose. I would suggest the following cables: