How to Repair Your ZOOM G2 G2.1U

Introduction: How to Repair Your ZOOM G2 G2.1U

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

Step 1: OPEN THE PROCESOR

just unscrew the back cover and be careful to put the five screws in a safe place

Step 2: GENTLY REMOVING THE FOOT SWITCHES PART

as this step says, gently remove the foot switch's pcb board and, with caution, remove the cable from the pins; it is not crucial, but it will be more comfortable to solder the contacts this way

Step 3: SOLDERING THE NEW SWITCHES

remove the defected switch and solder the new one. put everything back in order make sure the switches work before you close the processor. so... if the only problem you had was with the effect switch you're done. congratulations!

for the bank buttons move on to the next step

Step 4: CHANGING THE BANK/ EFFECT TYPE BUTTONS

these buttons are a little more time consuming to change, 'cause of the place where they are mounted, but it's no harder than the foot switches.

Step 5: GETTING TO THE PCB

first, you have to unscrew the jack inputs and output , then the circuit board can be removed slowly( it's not screwed to the chases )
one you get to the actual circuitry, remove the two screws and turn the cover and remove the knob buttons by just pulling them out. remove the nut and then you can remove the defected buttons and replace them.

Step 6: GETTING IT FINISHED

screw all the circuitry back on, connect the cables to the pins, check once more for the buttons to work , close the back cover and you're ready to rock with your favorite multi effect processor that responds like the first time you turned it on.

please excuse me if i made any expression mistakes and if i'm unclear in any of the steps; it's my first instructable.

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    156 Comments

    0
    stevegomash900
    stevegomash900

    2 months ago

    I have a problem with my g2.1 circuit
    The micro chips are over heating especially the zoom fx
    I want to know if I can the circuit

    0
    stevegomash900
    stevegomash900

    Reply 2 months ago

    Pls can somebody help me buy a whole circuit for my g2.1.....
    The micro chips in the circuits are over heating... kindly help me

    0
    stevegomash900
    stevegomash900

    Reply 2 months ago

    If I want to change the whole circuit can that be possible?

    0
    Van Olias
    Van Olias

    Question 9 months ago

    Hey guys I have this problem with my G2.1u. I have been using the unit for about 8 years now along with other zoom units, the problem started recently as the unit started producing a lot of background noises be it on clean or distorted effects. Tired it out through both Line cable and through USB and I'm getting the same result. Nothing seems to be wrong with the Input or Output ports or the USB port for that matter as when I lower the volume and play the Drum loops the background noise is absent. I tried rebooting it but still to no avail. If there's anyone who can help and have any suggestions, Please Please let me know. This gear had been my compannion for a long time now and I'm not ready to part with it just yet.

    0
    cesarquienmas

    Hey guys, I have this problem with my g2.1u. The thing is that it has that blinking "bt" 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

    0
    theFurg
    theFurg

    Reply 1 year ago

    #MarcoR48
    I know this is a 4 yr old answer but is it possible for you to update the solution link you provided?
    Thanks for your time and attention in advance regardless.

    0
    FelixS18
    FelixS18

    Reply 5 years ago

    I'm having the exact same problem! Did you ever find a solution?

    0
    AldoD2
    AldoD2

    Reply 5 years ago

    me too the same problem, Help!

    0
    paulmunic
    paulmunic

    1 year ago

    Hello,


    I don't speak and I don't write English very well.


    I need your help.


    I have a Zoom pedal model G2.1Nu (version: 1.01; serial no.
    004826).


    An unknown problem has occurred.


    I have a problem with the module selector.


    As you know, when I turn on the effect, the display is
    positioned on a patch (for example: A0).


    With the module selector on PLAY position, I would like to
    switch on COMP position, but this is not possible.


    Although I have selected COMP, the display still indicates
    PLAY.


    At this point, I try to select EFX and this is actually
    possible.


    Same thing if I turn the module selector on ZNR, on DRIVE
    and so on until to TOTAL.


    When I try to go back (from TOTAL to COMP), COMP finally
    appears on the display and I can edit it.


    At this point I go back to PLAY with the module selector,
    but the display continues to indicate COMP.


    In this way it is not possible to select a new patch (for
    example: A1) with the foot switches.


    Is there a possible solution for this problem?


    Thank you very much for your help.

    0
    ArjunaidiY
    ArjunaidiY

    4 years ago

    what problem my zoom G2.1u because small red light blinking?

    IMG_20160918_161952.jpg
    0
    jzuritaguzman
    jzuritaguzman

    Reply 1 year ago

    Holas disculpa tengo el mismo problema no sé si pudiste solucionarlo y si pudieras ayudarme porfavor muchas gracias de antemano

    0
    GiuseppeS46
    GiuseppeS46

    3 years ago

    Hi gents,

    My G2.1u pedalboard does non works, I have tried the reset procedure, the display AL flashing etc. but after all disapear and the equipment seems dead!

    As per some video on youtube the cause could be the "alimentation" the resistor or the voltage regulator etc. I have noted also a high temperature on the processor surface, and I do not if it is normal. However, I would like to know where I can find or buy the service manual. Some of you can indicate me the number of transistor located on back side of main circuit at the position "Q4" because on main board the number is scatched I can see only the number "5" plus partially the second number 0 or letter C. The transistor at position Q3 is marked: 6C s54

    Thanks in advance.

    Giuseppe from Italy

    gsantagata@iol.it

    0
    jzuritaguzman
    jzuritaguzman

    Reply 1 year ago

    Holas disculpa tengo el mismo problema no sé si lograste solucionarlo y si pudieras ayudarme muchas gracias de antemano

    0
    Camilad
    Camilad

    5 years ago on Introduction

    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?

    0
    sergiopaique
    sergiopaique

    Reply 1 year ago

    Hola,averiguaste que valor es r76 y el regulador?saludos desde argentina

    0
    SandipM19
    SandipM19

    2 years ago

    My zoom g2.1 nu display automatically mooving after on. Kindly help regarding this.

    0
    PhilH100
    PhilH100

    3 years ago

    I have never really used this pedal much as it would not change parameters using the "effect type" switches. This article confirms that they can be troublesome so before changing switches I simply sprayed some contact cleaner on them externally and "voila" it's now programmable!

    0
    BaseZ
    BaseZ

    6 years ago on Introduction

    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.

    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.

    There is no proper shop who are familiar with repairing guitar processors nearby.

    PS there is the image of the G9.2tt CB.

    DSC06160.JPGDSC06159.JPG
    0
    nikiraja
    nikiraja

    Reply 3 years ago

    nikhithraj.k@gmail.com for troubleshooting