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I think the ac power supply i used may have been the wrong polaity, hence my zoom g2 is not working from mains or battery. is there an internal fuse that could have blown? if so is it readily repairable

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If I remember correctly, these units are diode protected. You have smoked that part and it needs to be replaced. This is not a user repair as access is not easy. This is a simple repair for an experienced tech. Expect a parts cost in the $2 range.
Dan

Posted on Jul 25, 2009

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Does it have an internal battery?


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Dec 25, 2015 | HQRP AC Adapter / Power Supply for Yamaha...

1 Answer

How do I install patches?


Download n install 2 softwares for G2 from ZOOM website.
1. USB subsystem. Driver to connect zoom fx to PC/Notebook.
2. EDIT & SHARE. Software to create/copy sound patch.

Connect USB cable from G2 to PC/notebook.
No need adapter power supply, because the power is supply via
USB cable from PC/notebook.
Open EDIT & SHARE. It's easy,like copy,paste,rename,delete etc.
Just open the menu that you want to do and follow the
instructions. Sound patch can be load from files that you
download, or create it in EDIT & SHARE.
Patch can be load one files or group. Right Click the sound that you want to change,copy-paste it from new file/sound.
You can import/export files/patches from/to PC library (downloaded files).
It is recomended that you save/backup your original files,before load new sound.

I hope this helps.
Regards.

Aug 31, 2015 | Zoom G2 MultiEffects Guitar Pedal

1 Answer

Model Yamaha ME-50 no power


John
With AC power off.
Use a meter (on Ohms scale) to check internal fuse for blown (open) fuse.
If you feel qualified & safe with AC Power On.
Check input to internal power supply on AC Scale (Caution when AC is on) for volts in.
Use meter on internal Power Supply for "probably" DC volts leaving internal Power Supply electronics to power the rest of the electronic circuits.
Switch mode power supplies can break down. They stop doing their high frequency switching so they don't convert AC to DC.
If this P/Sup is a separate box or circuit board, inside the unit, then it can have a part number & be replaced.
Good Luck

Jul 14, 2014 | Yamaha Music

1 Answer

Noise


This seems to be a battery problem unless you use an AC adapter. If it does it on AC, I would check my guitar cord and power supply. The wrong power supply could do that and a bad guitar cord can as well. If you use a speaker cable as an instrument cable, it could do the same.

Mar 26, 2014 | Zoom G2 MultiEffects Guitar Pedal

1 Answer

How can i fix my zoom G2.1u red light flashing on screen?


if you are using batteries then, it is a sign that batteries are running low. just use DC or replace with new Batts

Dec 06, 2013 | Zoom G2 MultiEffects Guitar Pedal

1 Answer

My zoom g1x displays BT even though i don't use any batteries for it


You need to replace the power resistor R54:
http://gisywall.blogspot.it/2016/01/zoom-g1xn-continuously-shows-bt-on.html

Sep 28, 2012 | Samson ZOOM G1x Guitar Effects Pedal

1 Answer

I have a Zoom G2, It has excessive noise. It has the correct power supply and I tried powering it with batteries, but it still produces the loud distorted noise. It worked fine the last time I used it. ...


Check if it might be an intermittent input or output jack by wiggling these. Jackks are notorious for problems. Often the soldering of the jack to the circuit board seperates causing noise.

Sep 27, 2010 | Zoom G2 MultiEffects Guitar Pedal

6 Answers

Zoom H4 does not power up on battery power.


Probably two years too late, but I recently got a used H4 and it was having this same issue. Upon reading the documentation, it seemed as though it required a specific type of AA batteries. If you update the firmware (mine was 1.3) to the latest version (currently 2.4), you can toggle the battery type under the menu (most likely alkaline is what you want). It also added lots of other great features!

Jun 02, 2009 | Zoom H4 Handy Recorder

1 Answer

No power


There is a possibility that the receptacle for the adapter plug has one or more broken solder joints on the circuit board.

Mar 22, 2009 | Music

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