No instructions for a yamaha erg 121 c electric guitar

This will help you tune your gtr. Tuners have 3 lights 2 red and 1 green. Green is in the middle of the 2 lights. You may all so have a meeter with a number calibration. Dead center of the meeter is the # 440. 440 is what is what is called standard pitch When you tune up start with the 6 string low E. the biggest string A 5th ,D 4th G 3rd B 2nd E 1ft. Looking at the red lights when the lite on the left is red you string is flat adj. by tightening . To much and the right lite glows , your sharp, back off the tention untill the green lite glows and the meeter nedal is at 440. . Thats is what you want 440 and green. Do this to the rest and you will be at standard pitch. Good luck, keep on rockin in the free world DFD please rate me TKU

I don't really know what instructions you expected, although you should have received something for the tuner and amp. I suspect that you are new to playing the guitar, as, I don't wish to sound disrespectful, you would know what to do! So first, and again I hope not to sound like I'm treating you like a dummy, plug the guitar into the tuner input. Or if It's a piezo tuner clamp it to your headstock. Most tuners are now automatic so it should pick up on the string you are striking.Repeatedly pluck the same string til the tuner changes colour, or flashes, or some other indication to tell you the string is at pitch. Repeat the above for all 6 strings.
Then plug the cable into the amp input, switch it on, and bugger about with the controls til you get a half decent sound. ( thats what the rest of us do).Don't expext too much from this package, it is budget level, but of quite good overall quality.hope this helps