Hi, I'm not sure of the polarity of the Lexicon mx200. I have bought a multi tip transformer & it gives 2 options of outside + or inside +, do you know which is which please, I don't want to fry it! Thanks AD.

The power jack should have a little diagram that shows the ring and tip. The ring is the long sleeve on the plug, and the center would be the tip. The diagram should show the polarity. It's usually minus to the outer sleeve (ring), and plus to the tip. It might be on the adapter spec plate also. How to tell polarity expected of DC barrel jack
The circuit board should indicate the polarity (plus and ground).

Have you checked the cables, jacks, pan settings etc?
There may also be damage to the potentiometer.

you have to set a master and slave(s) devices, and ensure that all the timings (16/24 bit, the 44.1/44/96k) are consistent in all devices

If unt was dropped, look for broken PC board in the vicinity of the rotary encoder. Also look at solder connections to make sure they are sound. A little contact cleaner applied to encoder through an opening so the spray gets inside will help clean contacts. If the knob itself is hard to turn, the shaft is likely bent, and there may be damage to the encoder itself.

hi,
You have to check the working voltage of the adapter of you device. If it purchased from US then it will be 110V. I think the Line voltage in Australia is 220V.Also You have to check is there is any input voltage selector in the in its adaptor . If it there you have to change it to 220V. If there is no such selector then you have to buy a 220v to 110v converter .Then connect the out put of that converter to to your device. You can by this converter at any electronic spare part shope near to you. Or you have to by a new 9V 1.3Amps AC adaptor. When you going to by the converter or a new adaptor take the device. If so they will explain you how to connect the converter or adaptor . By changing a fuse you can't change the operating voltage. If The adapter is designed to use in 110V then the fuse will blow. If you change the fuse and make more experiment with it it will make the full system useless.
ok

Check that: You are using BALANCED interconnection lines (TRS or XLR) everywhere. Low quality cables can cause or let in noise and hiss.

Check that ALL, and I mean ALL interconnected equipment is powered from the SAME receptacle or power conditioner.

Check that you are not using a noisy source or recording system like the internal audio of a PC for instance.

Short the inputs to ground and see if the output noise goes away. Some effects are noisy because the inut signal after effects gets added back into the output.

You haven't described your setup and without that information there is not much more I can add. Ferreting out noise is one of my specialties. In general your input level should NOT be too small as this leads to less signal to noise ratio due to digitizing noise. Look at the Lexicon specs to find what the levels should be. Without the description of your setup I can add no more...

hello I have the same problem, I'm told that updating the firmware of the Lexicon MX200 is solved but it turns out that my pc does not recognize the device via USB to update, any solution? thank you very much

If the LED's are level indicators, you are probably saturating the input of the effect and may cause it to hang. Effects use delay and feedback and can cause numerical overflow and the system to basically crash. I would first call the Lexicon support and ask them about this problem... I did have to return one Lexicon product myself for service under warranty.

Easy answer: You DON'T set the polarity because this particular device takes a 9 VAC at 2.1 amp adapter. (Not a DC one like so called universal ones)
It sounds like you have one of those universal adapters which probably would not deliver the 2.1 amps required even if the lexicon took DC. Note that stuff might light up, but the unit will not work using a DC adapter..

You had better get an official power supply for this unit as what you have will NOT work, period!

I did a quick search to try and find a link to a supplier, but they are RARE !!! Every one I found would require you changing the plug to match the Lexicon.

You should just order the correct one from Lexicon.

I suspect the problem is with the software setup in your PC. Verify all the options and also verify that the AUDIO system is assigned as stereo and assigned to the Lexicon for both in and out... Also check any "PAN" control settings. There is a possibilty that the Alpha has a dead channel...

Try putting a stereo signal into the 1/4 inch jacks and see if both record... if NOT then take it for repair under warranty... I had a Lexicon Omega that had a problem myself... warranty repair...