Question about Roland Boss RC-2 Loop Station Stompbox Pedal

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The Auto on my Boss RC2 sometimes doesn't seem to pick up a signal and engage. It is plugged into a multi- socket adapter and I do not have the amp turned up too loud as the room is tiny. I thought it was supposed to pick up a signal no matter how strong. Maybe if there's any interference from any other close by source this could be the cause?

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Sometimes, with BOSS pedals, the battery must be disconnected before using another power source. I ran into the same problem with my DS-1 distortion. If it's not that, then check the power rating of the power adapter. It should read, for the output, exactly 9V DC. If it doesn't, then you have to get a power adapter that has that same rating. Boss pedals will not use anything other than 9V DC (I know, I've tried).

Hope that helps!

Posted on Mar 27, 2011

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2 Answers

Adapter polarity


Boss ME-25, use polarity like boss stompbox.
+ voltage at the ring, and - voltage at the center pin, of the adapter
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At ME-25 DC socket:


20023597-2ss5ycyvkoajtv035dpuezke-5-3.jpg



20023597-2ss5ycyvkoajtv035dpuezke-5-6.jpg

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Dont work display and no sound boss me-5


You have described a power problem. the unit is not coming on.Are you using the proper PSA adapter on this thing? If using a generic one, make sure the polarity is correct. Most of these things are wired backwards as compared to other types of devices. Does it work with batteries? This is where to start on a diagnosis. If it does, the wires from the batteries go through the socket where the adapter plugs in. Try spraying contact cleaner into the socket in case it is dirty or stuck in an open position. One more thing, IF a generic adapter was plugged into it that was opposite polarity, it may have burnt a diode on the circuit board. (a microscopic one at that)

Mar 31, 2013 | Music

1 Answer

I have a Boss GT -10 and its great. When I plug in my Gibson les paul into it and play it, there is sound. When I plug in my Other les paul with emgs in it, no sound comes out. I plugged them both into...


The half-way cord is the clue. Read up on unbalanced and balanced lines and TRS connectors.
One of these requires TRS connections and the signal is being carried on the RING of the TIP-RING-SLEEVE connector. Plugging in half-way the TIP touches the ring pickup contact. The emgs one MAY use TRS type cables and there may be a reason the signal and hot of these are reversed. If I could find schematics on all this equipment I could unravel the exact cause. You could make an adapter with a Stereo 1/4 inch plug and a 1/4 inch jack by wiring it to swap the tip and ring between them to use for connecting to the emgs guitar. ALSO verify you are using the SAME type guitar cable for both.OFTEN a TRS cable will NOT turn on the electronics when plugged into a guitar. Use an unbalanced instrument cable unless you have the XLR type output. Use of an adapter from the XLR type cable into the Boss will usually not work.

Apr 24, 2011 | Roland Boss Gt-10 Guitar Effects Processor...

1 Answer

My MT-2 wont distort my guitar.


A few things to try....

Usually the adapter will over ride the battery when used.
1) Make sure your 1/4" cables are working properly without the pedal "in-line".

2) Take out battery, and use just the adapter only. Make sure it is the correct and proper adapter that works with Boss. Usually the PSA-120. If you are not using a Boss Adapter, make sure yours is a direct replacement with same specifications. 9V/200mA. And "tip negative". DO NOT use Radio Shack stuff, nothing against them, but there adapters just don't mix well with Boss products and the like.

2) Try just the battery, no AC adapter. Remember to unplug the input when not in use. Saves battery.

Basic rule of thumb...when using correct AC adapters for all your pedals all the time, and all sounds good, then take out the batteries.

If you still experience problems, it would be an internal IC chip most likely. From there post another question maybe.

Apr 01, 2010 | Boss Mt 2 Metal Zone Effects Pedal

1 Answer

My boss digital delay works when engaged but no sound when not


sounds like the true bypass line has been damagd. Should be easy enough to fix. Pop open the unit and do a visual inspection first, if nothing is noticeable then do a continuity check with an ohm meter from input to output with the delay efffect off. If you don't read a short in this situation then your problem lays within the signal path and its switched path.

Jan 17, 2010 | BOSS AUDIO SYSTEMS Boss Dd-3 Digital Delay...

1 Answer

There is a constant loud hum/buzz whenever I turn the pedal on. With my Boss Mt 2 Metal Zone effects pedal. It happens whether or not the power supply is plugged in. Ive tried switching cables and...


First and foremost , check your signal chain. By that, i mean put the pedal aside, ...just unhook it and take it out of your signal path. Using the same cables , guitar , amp, other pedals - borrow a friends MT-2 if you can get one , and try THAT to see if THAT works , OR any other kind of distortion pedal. If another one works ok , it's YOUR MT-2. Boss pedals are pretty rugged , but sometimes the little actuator (on/off switch) underneath the treadle (where you push your foot down) will become faulty. That's a high-gain pedal - are you using a basic Strat or other single-coil pickup guitar? If so , are you playing close to any flourescent lights? SIngle coils are noisy around those lights. Will cause a hum / buzz if using a heavy dist. pedal. You can check that by moving around as you play.

Nov 02, 2009 | Boss Mt 2 Metal Zone Effects Pedal

1 Answer

The distortion on my Boss DF-2 doesn't work. When I hit the switch it just comes on and then off


Sounds like a defective switch or bad solder joints connected to the switch. Boss uses momentary switches which turn on when the switch is pressed and turn back off when pressure is released. This engages a switching system. If the switch is engaging itself again while the button being depressed, it will cause it go off again. And a bad solder joint would do this too if the signal is not being jumped to the switching circuit properly.

Aug 13, 2009 | Boss Music

1 Answer

My boss dd-3 pedal only works with a 9v battery. When I hook it up to the 9v apaptor, (a boss) it freaks out and does nothing. Can you help? Everything seems solid. the jack doesn't wiggle or anything.


You will have to test the adapter with a volt ohm meter to make sure it is putting out the proper voltage. It should be as close to 9 volts as possible. Also make sure that thehole in the plug is negative and the outside is positive. Is it the right adapter? I don't have a schematic for this model but www.schematicheaven.com has one for a DD-2. Hopefully they haven't changed too much. If you decide to repair it yourself, check the adapter first then check for a bad solder joint where the adapter plug is soldered to the circuit board. Hope this helps somewhat.

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