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BOSS ME 25 ADAPTER DOES NOT WORK, BATTERIES DO

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Adapter polarity


Boss ME-25, use polarity like boss stompbox.
+ voltage at the ring, and - voltage at the center pin, of the adapter
connector.
..20023597-2ss5ycyvkoajtv035dpuezke-5-0.jpg
At ME-25 DC socket:


20023597-2ss5ycyvkoajtv035dpuezke-5-3.jpg



20023597-2ss5ycyvkoajtv035dpuezke-5-6.jpg

Sep 12, 2013 | Boss ME25 Guitar MultiEffects Pedal with...

1 Answer

AC power supply polarity for BOSS ME 25 guitar effect.


Center negative. 9.6 VDC 500ma Boss PSA-120S is official adapter.

Mar 07, 2011 | Boss ME25 Guitar MultiEffects Pedal with...

1 Answer

My boss metal zone pedal power light wont come on when i hook the ac adapter to it i get nothing but a hum and no output clean or distortion,then when i plug a 9volt battery in it gives only clean tone...


There is a switch contact that connects the battery when you unplug the AC adapter. These commonly get sprung and cease to make contact leaving the battery disconnected when adapter is unplugged, resulting in no power. Verify the battery is being connected and see if the unit works properly. If so the adapter is either the wrong one or defective.
In other words, there may be two problems.

Jan 30, 2011 | Boss Mt 2 Metal Zone Effects Pedal

1 Answer

Check does not work does not turn red light metal zone boss


Check your power adapter or battery if you are using a battery.

Jan 29, 2011 | Boss Mt 2 Metal Zone Effects Pedal

1 Answer

My light turns on, can't switch it off, no effect or signal coming through at all. It appears to be in in working condition, just don't know what is going on.


First thing is to check that powr adapter is the correct one and/or battery is good. Light will come on with near dead battery or wrong power adapter... Wrong adapter can damage the unit.

Dec 12, 2010 | BOSS AUDIO SYSTEMS Boss Dd-3 Digital Delay...

1 Answer

I cannot turn on my Micro BR - its plugged in and has new batteries but still won't work Does this mean it's completely broken or is there some sort of stand by phase that may have initiated itself?


The devices that have battery AND adapter capability OFTEN have a switch that the adapter opens when powered by the adapter. Often this switch contact gets bent and units won
t run on battery, so try it on an adapter... if the adapter works and battery doesn't, this contact whcih is a part of the input power connector has failed.

Sep 06, 2010 | Boss Micro BR Digital Recorder

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

Boss noise reduction pedal stopped working for no reason at all. worked fine the day before, went to use today no power at all. it is run from an adaptor so its not the battery, any clue?


The power jack on MANY of the pedals are weak and a yank sideways can damage the jack or the board it is mounted on.

ANOOTHER problem is using an adapter with the wrong size plug. SOME plugs have a larger diameter hole and will work intermittenly.

Oct 05, 2009 | BOSS AUDIO SYSTEMS Boss Ns2 Noise...

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.

May 14, 2009 | BOSS AUDIO SYSTEMS Boss Dd-3 Digital Delay...

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