What letters / numbers that appears on the screen?
If the display is normal, and you can switch to other banks, and can edit each bank, then the problem of no sound, is at the pre-amp IC input, output amp, or CODEC converter.
This is the overall image of G1X inside.
Next, we zoom-in the middle of picture above.
See the next picture.
IC2 (left) is input pre-amp IC (NJM2100).
IC4 (middle) is the CODEC IC (WM8734).
IC5 (right) is the IC output (NJU7082).
Test whether the input IC is working normally, turn ON G1X, plug the guitar, go to BYPASS/TUNER menu. When the TUNER function could work, certainly input IC is not damaged.
Means only two possibilities, namely CODEC and output IC. That is not easily tested, except in specific ways.
May also, there are problems in the input / output socket.
Turn ON G1X. Try the following (see figure below):
NOTES:
If lcd light are on (as you say), but appearing G1 or d5 or bt, and the system are hang / frozen, this is a different issue to the one described above,and dealt with in different ways too.
References IC datasheet:
NJM2100.
http://www.njr.com/semicon/PDF/NJM2100_E.pdf
NJU7082
http://www.datasheetarchive.com/dlmain/Datasheets-22/DSA-439015.pdf
WM8734 http://www.cirrus.com/en/pubs/proDatasheet/WM8734_v4.4.pdf
.
SOURCE: Where should the Zoom G1X go in a pedal chain?
From an electrical engineering standpoint, an expression or volume pedal should be near the end of the chain so that the other effects don't try to process very weak signals when the volume is very low.
This gives better signal to noise ratio.
SOURCE: The zoom g1x is dead. no power. tried adapter from
The first thing i would check is the ac adapter .Make sure you are getting the correct voltage from the adapter.If you know how to use a voltmeter or know someone that has a volt meter,check it with it unplugged from the guitar pedal,most of these have a voltage range from 9 to 12 volts dc.you could also take it to your local radio shack or local repair shop and they will be glad to check it for you for free.after you confirm the adapter and it is ok then the next thing you will check is the input jack assy on the pedal,input jack assy are soldered onto the board at the factory,these jacks ,no matter what it is are famous for cracked solder joints where the pins of the jack go into the board because of stress delivered to it during plug ins and plug outs.if you dont know how to use a sldering gun or dont want to you will have to take it it to your local repair shop-cost should be around 15.00, 20.00 tops,make sure that your guitar cables are good,check the 9volt battery inside the unit if it takes one,if its dead that could be your problem,if all above fails i would send it back to the factory or wherever you bought it.,good luck been playing for about 30 years myself,rock on
SOURCE: g1x zoom guitar effects no
if you're using an adaptor other than the original zoom, make sure it's 300mA or more and try switching the polarity.
SOURCE: zoom g1x dc supply not working, my zoom g1x is
hi why my zoom g1x give code bt. then i reback the adptor the lcd monitor g1 only then later has no power pls help me pls
SOURCE: What resistor type used in zoom g1x? Please help
Quite a few. If you can't ID it on sight, contact ZOOM for a schematic.
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