iFixit - Answers With Device "Musical Instrument"

Yamaha PortaSound PSS-570: No enciende por sobrecarga de voltaje

Sun, 07 Dec 2025 01:19:30 -0700

Conecte una fuente de alimentación de más voltaje y Creo que se quemó algo y dejo de encender, tendrá reparación?

Musical Instrument Accessories: Alguien sabe cuál es el circuito de un pedal Johnson eq distorsion 2

Sun, 23 Nov 2025 20:02:42 -0700

Necesito reconectar todo

Fender Stratocaster: Consulta el selector del medio no está funcionando

Sun, 03 Aug 2025 11:23:20 -0700

Adjunto foto, quiero saber si la electrónica está bien realizada,porque el selector al poner al medio no funciona.

Guitar Amplifier: Amplificador Fender Mustang V1 no suena

Thu, 12 Jun 2025 14:15:28 -0700

He comprado un amplificador Fender Mustang V1 que no suena, no sale sonido por el parlante solamente se escucha por la salida de auriculares, ya probé conectándolo a otro parlante he revisado el circuito en busca de corto y lo único que encontré es que entre la etapa de preamp y la etapa de amplificación señal se pierde.

Si alguien ha tenido un problema similar agradecería su ayuda.

⟐ Answered junio 12, 2025 at 14:15 GMT-7

Electronic Keyboard: Necesito el plano del circuito interno de yamaha mo8

Tue, 15 Apr 2025 11:37:45 -0700

Necesito encontrar el plano del Yamaha mo8 gracias de antemano

⟐ Answered abril 15, 2025 at 11:37 GMT-7

Electronic Keyboard: Teclado ark 518 54 tecla prende, enciende la pantalla pero no suena

Sun, 03 Nov 2024 17:55:11 -0700

Tengo un teclado ark 518 54 tecla me lo compré en la feria el tema que me pasaron un cargador con la Polaridad incorrecta 9v 300ma y no prendía la pantalla y solo sonaba los parlantes cómo zumbido, me pareció muy extraño pero lo dejé conectado un momento para medir la corriente, pasaron unos minutos y dejaron de sonar los parlantes, después coloqué otro cargador con un poco más de voltaje 12 volts con 4,5 amperes, ahora con ese cargador prende la pantalla pero no suena ningún botón del teclado donde se pueda apreciar que hay un tambor una guitarra o cosas así que puede tener el teclado, cuando tenía conectado el cargador de la polaridad incorrecta noté que un condensador se calentaba mucho ahora mis preguntas.

Qué podré haber quemado? (No salía ningún olor a quemado)

Será que al colocarle más voltaje del que necesita el teclado no suene?

Nota 1: como pueden darse cuenta tengo conocimientos básicos de electrónica pero recurro a este foro para que me ayuden a encontrar la falla.

Nota 2: aparte después probe el cargador con un tester y no da ningún voltaje y se calienta mucho

⟐ Answered noviembre 03, 2024 at 17:55 GMT-7

Acoustic Bass: Como cambiar las cuerdas

Mon, 15 Apr 2024 09:08:46 -0700

Cómo cambiar las cuerdas

⟐ Answered abril 15, 2024 at 9:08 GMT-7

Casio CTK-501: no encende mi piano

Mon, 06 Jul 2020 23:14:30 -0700

mi piano ctk 501 dejo de encender,, el transformador de corriemte funciona bien, pero el teclado no enciende, cuales serian las posibles causas ? y lo peor que podria suceder con el?

⟐ Answer edited julio 06, 2020 at 23:14 GMT-7

Casio WK-220: Como se habré el teclado para ver la entrada de el transformador?

Thu, 27 Dec 2018 08:27:52 -0700

Necesito abrir el teclado ya que la entrada de el transformador esta suelta.

⟐ Answered diciembre 27, 2018 at 8:27 GMT-7

Guitar Amplifier: Mi fender Frontman 25R le vibra algo dentro cuando toco notas graves

Tue, 08 May 2018 21:27:04 -0700

Hola, hace poco a mi amp Fender Frontman 25R empezó vibrar o resonar cuando toco las notas graves de mi guitarra, me gustaría saber si me pueden ayudar diciendome que es y si tiene arreglo. Muchas gracias

Google Translation

Frontman 25R my fender something inside it vibrates when I play bass notes

Hello, recently my amp Fender Frontman 25R vibrate or resonate started when I play the bass notes of my guitar, I wonder if I can help it and telling me if you have arrangement. Thank you very much

⟐ Answered mayo 08, 2018 at 21:27 GMT-7

Korg B1: Korg B1 - specific notes don't work, problem with circuitry

Sun, 26 Jul 2026 16:42:46 -0700

Aloha all, I just purchased a Korg B1 digital piano with known issues. The keyboard sounds great but has specific notes that don’t work. Starting from the E after middle C, all Es, Cs and G#s don’t work.

Luckily, I found another ifixit post, the only place on the internet it seems, where someone understood why specific notes wouldn’t be working. Here is the link: ++"E" key and 3rd black key is not working.

I understand very little about circuit boards, but I was able to identify the problem immediately. C, E and G# receive and give inputs along the same path. There is an issue with the soldering on one of the *things* at the first E key, where the problem starts. See the images for this issue.

So, one of my problems is that I don’t know anything about circuits or circuitry terminology, so I can’t even describe this issue, much less start to fix it.

Can anyone help me at least put a name to this, so I can start to go about fixing it? It seems like a basic circuitry issue that wouldn’t be hard to fix, but I don’t know where to start. Any help is appreciated.

⟐ Commented julio 26, 2026 at 16:42 GMT-7

Yamaha P115: Keys Suddenly Not Sounding

Sat, 25 Jul 2026 12:03:05 -0700

Hi. The Db and G keys in the upper octaves (6 and 7) of my P115 are suddenly not sounding. Any ideas how to fix them?

⟐ Commented julio 25, 2026 at 12:03 GMT-7

Fender Starcaster: Which pick guard did this particular instrument use

Thu, 23 Jul 2026 00:10:37 -0700

I need to replace the pick card which one do I buy

Teenage Engineering OP-1 field: OP-1 field Faulty Microphone Repair

Fri, 10 Jul 2026 09:58:43 -0700

I've loved my OP-1 field and taken good care of it, but in the last month or so the internal mic went from sounding terrific to only ultra high end and zero body in the sound. Has anyone come up with a guide to replace the mic? Thanks!

⟐ Commented julio 10, 2026 at 9:58 GMT-7

teenage engineering EP–133 K.O. II: Some buttons (main, tempo, fx) are mushy/hard to press.

Fri, 05 Jun 2026 16:44:53 -0700

Some buttons (main, tempo, fx) are mushy/hard to press than others on a brand new unit with v2 update installed on it. Is there a fix to this? How easy is it?

Electronic Keyboard: Yamaha PSR E253 has a button that keeps pressing on its own

Tue, 02 Jun 2026 21:52:24 -0700

Hello, there is a button in my keyboard which is the minus button, it presses on its own causing the voice to change continuously/constantly. And another thing is that I can't press other buttons beside it if it does that thing. What do I need to do to fix this?

⟐ Commented junio 02, 2026 at 21:52 GMT-7

Casio keyboard: CDP S160 a few keys mysteriously triggering or stopping other keys

Sat, 30 May 2026 12:41:18 -0700

This repair is for a poor customer who's 15 year old lad is so desperate to get it fixed! Yes he confessed to spilling some gooey drink over it! - cleaned carefully first four octaves contacts and PCB board. re graphited the board in places. Cured a dozen keys, BUT C1 + F1# + E2 + C3 + G3# giving very mysterious triggers! ( and these notes well away from where the spillage occured). These five sometimes no sound, then sometimes they all work, BUT when they are all working , holding down C1 + F1# + E2 together - The C1 delays - then double triggered several times sometimes ( whilst all three are continuously held down!) When these 5 x keys decide to work, they all work fine when pressed individually !! How mad is that ??

I know rubber contacts must be okay, swapped them to working parts of keyboard - and the working parts still no problem. Examined all connectors - very few anyway,

motherboard no visual signs of damage or corrosion etc.

Can only think the channels from some keys are interfering with others (short circuit?).

Not knowing how the send signals from each note are clustered together - so hard to prove any short or crossover going on.

. I see some questions here others have had similar problems, - and as yet unresolved?

Fender Stratocaster: My guitar sounds low even at full blast

Tue, 05 May 2026 20:29:05 -0700

What could be causing it

⟐ Commented mayo 05, 2026 at 20:29 GMT-7

teenage engineering EP–133 K.O. II: Need to replace the Fader and an encoder knob, need parts?

Fri, 01 May 2026 17:14:56 -0700

I bought one of these used, and the fader and the BPM encoder knob do not function correctly. I'd just replace both myself, but not sure what replacement parts to order. I've seen some sources say I just need a 45mm Type B 10k for the fader. I'm not sure about the encoder. Looking for answers.

teenage engineering EP–133 K.O. II: Input is not detected

Fri, 17 Apr 2026 04:12:14 -0700

Hi !

When I plug a 3.5mm jack cable in sample mode nothing happens.

The displays stays in MIC instead of switching to LR. I assume this is a hardware problem but I'm not sure about it. Is there any way to fix the stereo jack 3.5mm input ?

Thank's

Alain