if you are having problems switching through presets or banks , this should probably mean that the micro switches have worn out. this instructable will guide you through a few steps on how to change them.

all you need is :
a soldering iron
a few micro switches
a screw driver


just unscrew the back cover and be careful to put the five screws in a safe place
<p>My G21u just freezes after a while and you cant change any parameters at all until you restart the unit, and the volume goes and there is no output, any ideas? cheers</p>
<p>hello I am repairing one g2 1u need the value of resistor R76, capacitor c68, c67 and datasheet of transistors Q3 and Q4 someone could help me?</p>
<p>my zoom g2.1nu wont start..it remains on the menu where its shows G2.1NU Ver:1.03..please help me. I hope u can help guys..thx a lot</p>
<p>I got the same problem!! On my G2.1KL (Kiko Loureiro Signature), can someone please help us? I already updated everything and still get this type of problem</p>
<p>did you try to update the firmaware or reset?</p>
<p>still the same... :(</p><p>please help</p>
<p>can u please tell me how to reset or update the firmware!! u r very cooperative ...thx a lot man</p>
<p>Basically you must conect the pedal to your pc, download the firmaware from zoom's web and run the software.<br>In the user manual you can find the complete instructions to do it, but if you don't have it here is an online version. </p><p>http://www.manualslib.com/manual/500464/Zoom-G2-1nu.html?page=32</p>
<p>Hello, I donno if this is the right place to post my multifx problem. Well, I have a Zoom g9.2tt and has been using for a year now, bt all of a sudden it ran into problem.</p><p>The unit switches on but there is no sound from the unit neither it reads the input signal. I have tried bypass yet no indication on the tuner also tried running audio from the Cubase s/w there is no sound at all. I have checked all the periphery connection, everythings fine. Could someone help me out cause I couldn't figure what's wrong with it. </p><p>There is no proper shop who are familiar with repairing guitar processors nearby.</p><p>PS there is the image of the G9.2tt CB.</p>
<p>I forgot to mention that if my suggestion does not work, then reinstall Cubase but first uninstall then reinstall. In my experience, a reinstall of drivers usually is the best choice due to fix corruption. I found the manual: </p><p>http://www.manualslib.com/manual/485932/Zoom-G2-1u.html?page=24#manual. They stupidly do not have a troubleshoot section. but you may want to review it to see if there is help. Good luck.</p>
<p>Hello Bruce, thanks for the support. Actually It's not the cubase that I am concerned about but it's my Zoom G9.2tt unit. There is no sound coming out from the unit nor does it detect the input signal. btw the unit switches on and everything works fine just that it doesn't do what it's made for i.e produce sound. Tunner doesn't pick the signal either.</p>
<p>You are welcome. More questions, some relevant some not so bare with me. First off, you get <br>no sounds directly from the unit, are you in the Play mode? To get the sounds to work with the patches in the G2, you have to be in the play mode and the volume can be raised from the lowest setting for each patch, therefore, adjust it inside the unit. If there is no response from your tuner inside the G2, then the software configuration in the unit may be at fault. Is the G2 itself set to mute? Have you recorded your sounds in Cubase and are there wave forms? How do you <br> have the outputs and inputs set up in the G2? Describe how things are set up. Have you tried to do a factory reset? Sorry for all the question but I need to know more. Is your expression pedal used for volume control? If so, then make sure it is not in the off position. Press the pedal down with your foot slowly to see if you get volume and again adjust the volume in the G2 for each patch that you are using. I hope this helps. Is the output cable to the unit from your guitar connected to the mono or left output? Please me know if any of this helped.</p>
<p>I do not know if I can be of help, I'm here on this site to fix my gt 6 boss processor. I read your testimony here and in my experience it is usually an internal volume control that may be turned down or off. Also, check your pre amp to see if the volume control is off, but it sounds as though you covered that base. What drivers do you use for Cubase for audio? Make sure that Cubase is recognizing your sound card. I am not familiar with Cubase but I would imagine there is an audio reference page. If it is not recognized, then reinstall the drivers. I hope this helps. Let me know if it worked. </p>
<p>I'm Of Brazil and need two of this micro switches how the Banks and Rythm ... Someone have this to sell me , send me please... I Need So much of this! Or know where to found this.</p>
<p>You may also try just to refresh the solder. I fixed a problem with my rhythm micro switch that way, without changing micro switch itself.</p>
<p>Hey All, I have Guitar Effect Zoom G1X, I had trouble on PCB mount jack input &amp; phones output, does any body know where I can get the spare part original for ZOOM PCB? thanks</p>
<p>Hey guys, I have this problem with my g2.1u. The thing is that it has that blinking &quot;bt&quot; message on the display, but I'm using zoom's ac adapter, do you know If I have to replace or change something? Please let me know</p>
<p>Noite Boa, Sera Que alguem poderia me FALAR quali EO IC10 POIs uma da Minha G2 torrou e ficou Imposs&iacute;vel de sabre E quali.</p><p>DESDE J&Aacute; agrade&ccedil;o.</p><p><br></p>
<p>Noite Boa, Sera Que alguem poderia me FALAR quali EO IC10 POIs uma da Minha G2 torrou e ficou Imposs&iacute;vel de sabre E quali.</p><p>DESDE J&Aacute; agrade&ccedil;o.</p><p><br></p>
<p>Hi,</p><p>I was hoping someone could help me. I was using my G2.1u today into my keyboard with the rhythm section going, no problems at all. Have been doing this for quite a while. All of a sudden, no rhythm section. I don't think I hit any buttons but it is possible.</p><p> </p><p>Nevertheless, nothing I do can get the rhythm to come back. Is there a setting I'm missing? I'm inclined to believe it is the actual button on the unit isn't working because while I can hear all the guitar effects in my keyboard (delay, drive) when I press &quot;rhythm&quot; it doesn't bounce over to that mode and let me modify tempo or pattern. It's not getting to that section.</p><p> </p><p>I don't know how the button could have just broke though. This unit isn't used in performance. I'm pretty gentle with it and use my fingers, not feet.</p><p> </p><p>Please help! I need the rhythm section to work.</p><p> </p><p>Steve</p><p> </p>
<p>Please send me some info about burned transistor Q2 (6CN). Is there any replacement?</p>
<p>i think Q2 is the same as Q3 &amp; Q4, <br>that's a BC817. and replacement that could work maybe BC337. here is the <br> datasheet ... good luck!</p><p>http://www.s-manuals.com/pdf/datasheet/b/c/bc337%2C_bc817%2C_bc817w_series_nxp.pdf</p>
<p>RECTIFIYING: Q3 &amp; Q4 are BC807 (NOT BC817). because BC807 its PNP polarity, and BC817 the NPN version.</p><p>Thus replacement will be BC327 and NOT BC337 in TO-92 case. </p>
<p>Thanks, works well with the replacement.</p>
<p>so you made it? i didn`t try yet because i can't find bc337 far <br>away from the city, but if works to you i'll buy a couple of them by <br>internet and wait 'till they come.</p>
<p>Hi Guys,</p><p>Thanks for all the valuable info. I am a G2.iu owner and I love it, but I have an insurmountable problem for which I find no remedy. ( Even after reading the manual thoroughly .)</p><p>At last power up, all I got was a blinking edit light and nothing more. Power modes for battery and DC are functional, but no USB and no coms with laptop.</p><p>The juice is flowing through, as you can hear the output connecting with the amp at power up, but no boot up of the Zoom processor occurs.</p><p>I have had some problems with power surges and lightning strikes in the past so I imagine this might have toasted something fragile. </p><p>This is a great piece of kit and I would hate to lose it. Could anyone please suggest the next step in diagnostics, as I will have it repaired by an expert if necessary ,if possible and affordable.</p><p>Could it be a ribbon connector or am I being optimistic?</p><p>All The Best . . .</p>
<p>Have you check the common failure of Q4? <br> or maybe another transistors like Q2, Q3 Q5 or Q5? If so, replacement <br>could be BC817 or BC337. I`m sure it works for blinking led, but not <br>sure about usb power. </p><p>http://www.s-manuals.com/pdf/datasheet/b/c/bc337%2C_bc817%2C_bc817w_series_nxp.pdf</p><p><br>Also you must check ribbon conector integrity.</p><p>good luck!</p>
<p><iframe allowfullscreen="" frameborder="0" height="281" src="//www.youtube.com/embed/nM_zCGoGZg8" width="500"></iframe></p>
<p>my zoom g2.1nu wont start..it remains on the menu where its shows G2.1NU Ver:1.03..please help me. I hope u can help guys..thx a lot</p>
<p>hllo,<br>my g1xn is not starting <br>last time when i using it <br>the display shows &quot;bt&quot; again and again <br>then after sometime it stops working <br>i opened it whenever i m trying to start it <br>the resistor is heated too much<br>i dont know why?<br>when i take it to nearest electrical shop it says there is IC problem <br>plz, can u tell me what is the real problem and how i can fix it?</p>
Hello! <br> <br>Someone please, can tell me what's the value of the resistor numbered as R8, that is just next to the Q4 transistor? I have a Zoom G2.1u to repair but someone before me tried and that resistor for somehow is missing. <br>Thanks. <br> <br>Best regards.
I did work on Q4. If its the one across its base/emitter leads, its 470 ohms. I remember actually measuring the value. BTW, keep us informed if you solve the &quot;G2 will not switch on&quot; problem. Like to keep in touch so we can share info? <br> <br>Hope this helps, Erich.
Hi. <br> <br>Thank you very much erichans! And sorry I have taken so long to say something. <br>I have let the Zoom with someone with more knowledge in electronic repair, to try to fix it. It seems that applying the missing resistor on the already replaced transistor (Q4) solved the boot problem. I can't be 100% sure as it needed addicional repairs, because the previous owner done more damages than good, in his attempt to repair the unit. However the unit became bootable again, even if not fully functional, after working in the Q4. <br> <br>Best regards, <br> Paulo Zacarias
Hi! <br> <br>Unfortunately the zoom G2 isn't 100% working, it have a minor problem but very limiting in it's use. The [-] BANK button when in edit mode, behaves like the STORAGE button, in other words when choosing the Drive the [-], instead of come backwards in the list of different drives, makes the display show the current bank and patch number blinking and with a second click saves the settings. Anyone have a clue of can be the problem? <br> <br>Best regards.
@ pzacarias<br>Make sure the 20 track Display ribbon connector is properly plugged in at both ends. You get some weird results sometimes if this is not so. Make sure the offending buttons are not sticky. Again weird displays. Were the buttons spray cleaned? Be careful!! For myself, I use any good contact cleaner, spray or liquid, and rapidly exercise the buttons.<br><br>Good luck!!<br><br>Erich.
Dear Erich, <br> <br>Thank you for the prompt response. I will try to do what you said. However I don't think that the problem is in the display, is something wrong with the button BANK [-], or its function because it saves the settings I choose, like the storage button. Strange don't you think? <br> <br>Best regards.
<p>Hi.<br><br>My Zoom it's finally 100% working, the problem were on the 20 pin flat cable that connect the buttons to the main board.<br><br>Best regards.</p>
Great to hear!! So it was finally the 20 pin ribbon cable. So glad your processor is working. working!!<br><br>Erich.
If its the one across the base/emitter points of the transistor Q4 its value is 470 ohms. <br> <br>Good luck! <br> <br>Erich
Hi! <br> <br>My G2.1u does not work on batteries. It did work yesterday though. The batteries were fully charged; trying new alkaline batteries neither worked. The battery cable is fine and is connected to the board. The unit still works with the adapter and USB power. It just wouldn't work with the batteries. <br> <br>Any help you could offer is much welcome. Thanks.
Hi, <br> For the battery to work, adapter must be unplugged. I had a G2 (same thing as far as the batteries go) with a rusty contacts problem. Corrosion on the battery contacts in the battery compartment. Obviously, scrape clean! Check with a meter battery voltage is available at the CN1 battery plug. Check for continuity between battery pin 1 on the board and the number 2 point of the adapter socket (adapter plug removed!). There's often a bad contact here. <br> <br>Maybe the above will get you somewhere if the Unit is working on the adapter. <br> <br>I apologise if I've told you too many obvious things. Things are obvious to some and not so obvious to others!! <br> <br>Rgds., Erich
Hi, <br> <br>I was able to fix my g2. The DC jack was the problem. When you said the adapter must be unplugged, it gave me a hint that the problem could be the DC jack since the adapter was already unplugged from the unit. I thought maybe one of the metal contacts inside the jack got stuck so I used a paper clip to pull them towards the center. To my surprise, the unit suddenly worked. Someone must have accidentally tripped over the wire. <br> <br>Thanks a lot Erich!
Hey man . i have a problem with my zoom G1 .. the resistor seems to be burn. can you tell my what value is the resistor .
I know you are talking about a G1! Please read what follows very carefully! <br> <br>In the G2/G2.1u this is a 3.3 ohm (I guess 3 watt!) resistor. So the value in the G1 wont be far distant from that, will be around that. But please be very careful what you are doing. That resistor could have burnt out in the first place due to something it was supplying being defective (shorting). <br> <br>Just to bring you into the ballpark. <br> <br>Erich.
hey i found this manual for zoom g1 .http://prntscr.com/24irqg .. is that the value? 18ohm 2watt .
Very good url find!! However I didn't see any reference to the Processor it is applicable to from that one pic since you took a screenshot of the specific area. Could you please double check that. At first glance 18 ohms, 2 watts seems correct. <br>Congrats! You seem to have made a great find getting the Manual! The same site you got this info may also have something pertaining to my problems on the G2.1u too, so would be grateful for that info if you can get it. Marvellous for me if they have a G2.1u Manual and Circuit Diagram!! <br> <br>Regards, Erich.
I found that info here , http://elektrotanya.com/
Thank you so much! I got the G1x, but could not find any of the ZOOM Pedals SM, Repair Info, etc----like the G1XN or G2.1u. Can you help me? Use your magic fingers to find me any Info, SM on any Pedal? <br>Did you solve your problem with the 18 ohm, 2 watt resistor? <br> <br>Erich.
BTW, let's know if you solved the problem! <br> <br>Erich.
Copy paste that link into your browser please . I cant upload a pic here. Thanks .

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