iFixit - Answers With Device "Guitar Amplifier"

Guitar Amplifier: ¿why when I play with my amp for too long gets distorted?

Tue, 03 Mar 2026 18:45:34 -0700

basically when i played for 1 or 2 ours the red light above my FENDER HOT ROD DE VILLE 2 decreases its intensity and the sound gets an ugly distorted fuzzy sound

EDIT: i used it for about 40 minutes and it dosent turn on, not even the light :(

i checked the socket from the two big tubes and they look fine to me

i dont know maybe it's the connection that goes to the speakers? there is only one input being used, i dont know nothing about amps or circuits

⟐ Answer accepted March 03, 2026 at 18:45 MST

Guitar Amplifier: Hum from SS AMp

Mon, 29 Dec 2025 17:01:33 -0700

I have a danville amp which when a Boss GT100 is plugged in creates a loud hum, but when a guitar is plugged strait in there is no hum, I have also tride send /recieve input

Using my Fender , there is no hum whatso ever

⟐ Commented December 29, 2025 at 17:01 MST

Guitar Amplifier: My line 6 amp comes on but no sound

Mon, 15 Dec 2025 02:05:04 -0700

Not to long ago I went to play my guitar with headphones on .well I plug my headphones in the Head phone jack well it ended up getting stuck and broke off inside the headphone jack. On the amp but I got the piece out but now it powers on but no sound so please some one help me

⟐ Edited December 15, 2025 at 2:05 MST

Marshall MS-2: I need to replace the tone potentiometer because the shaft broke and w

Fri, 26 Sep 2025 17:45:35 -0700

I need a replacement tone pot

⟐ Answered September 26, 2025 at 17:45 MST

Marshall MS-2: Marshall ms2 lets out sound only when I put it on OD

Wed, 04 Jun 2025 09:09:07 -0700

Hi so i have a problem - my marshall only turns ON when switching to OD. It’s like the OD option doesn’t exist. When i switch it to ON guitar doesn’t let out any sound. When on OD it’s like normal guitar - no electric sound. is there any way to fix it?

Rogue G10: Why am I only getting static from my amp when I turn it on.

Fri, 25 Oct 2024 08:12:56 -0700

I used my amp with my acoustic/electric guitar, which has batteries in it for power. Now, when I turn it on, it only produces static. No other response.

Guitar Amplifier: Loud noise only when input in

Wed, 18 Sep 2024 11:48:36 -0700

New to these devices (this is a Peavey Vypyr VIP 2) and I have no idea what is causing it. I see multiple things that look wrong but nothing I can definitely say is causing the issue and it honestly looks like someone else opened it and did stuff before me. Any ideas are appreciated.

Edit: new issue, whining with no volume on, loud noise when volume on. New better pictures and new video

Edit:

⟐ Commented September 18, 2024 at 11:48 MST

Fender Frontman 15r: Channel switching button seems to be having poor contact/broken.

Sun, 04 Aug 2024 15:59:05 -0700

When attempting to switch to the drive channel on my amp, the button seems to be having a contact issue. When I press it to use the drive, the sound doesn't come out, or when it does it sounds like when a cable is having contact issues. I know the issue is on the button itself because sometimes when I press it on a specific way, the drive channel works without issues, but after playing a while, I assume the vibrations move the button out of the good position because it goes back to the same issues as before. What's the best way to fix that? Should it need replacement, how do I go about looking for a new one? Replacement parts for amps seems hard to find.

⟐ Answer accepted August 04, 2024 at 15:59 MST

Guitar Amplifier: Crate GFX 212T amp sound cuts out

Tue, 09 Jul 2024 09:11:41 -0700

The sound cuts out on my Crate GFX 212t but returns with pressure on any control knob or bumping the amp. I'm thinking loose solder joint but not sure where to start.

⟐ Commented July 09, 2024 at 9:11 MST

Guitar Amplifier: Marshall 3315, 150 watt SS, Missing a couple parts. Any ideas?

Fri, 10 May 2024 07:10:23 -0700

I got a Marshall model 3315, 150 watt solid state head that seems to be missing a few parts. I don’t know the history of the amp as I got from a guy thst was about to scrap it at a scrap yard, so I gave him $5 for it. At 1s, I thought it was a JCM, but when I opened it up, no tubes. I’m going to try to post some photo’s. Can anyone tell me what I need? I want to see it rock again.

⟐ Answer accepted May 10, 2024 at 7:10 MST

Fender 65 Twin Reverb: Dead Normal Channel - No Sound at All.

Thu, 25 Jan 2024 21:06:21 -0700

Hi - yes its the same amp which had the transformer issue. This time, in spite of the new transformer, the normal channel is silent. No sound when I plug guitar in. Here is what I have done so far. Aside from the transformer, I have also replaced, the filter caps, all tubes, retensioned the tube seats, cleaned seats, pots and jacks. The only sound I will get is when I run the guitar lead across my hand. Note, the guitar and lead works perfectly on the vibrato/reverb channel. What have I missed?

⟐ Commented January 25, 2024 at 21:06 MST

Fender 65 Twin Reverb: Need Help Replacing a 240v Mains Transformer - RESOLVED

Sun, 14 Jan 2024 01:15:53 -0700

So I need to replace the mains transformer in this amp. It is a 240V primary power. The new transformer wire colours do not match the schematic I have and I am having difficulty identifying which wires on the primary side go where. I have the secondary side nutted out. Appreciate some help with the primary side. Cheers.

Pictures attached

Hey guys - I contacted Hammond - the maker of the transformers, and he gave me an updated wiring diagram. This coupled with a mate working out which primary wires go to which jumper sorted the problem and the amp and its new transformer are on speaking terms. Big thank you to all who contributed to this thread. Cheers, Rhea deLascy-Wells.

⟐ Edited January 14, 2024 at 1:15 MST

Fender 65 Twin Reverb: Dead Channel on Fender Twin

Sat, 13 Jan 2024 23:51:47 -0700

Fender Twin Reverb (re-issue) clean (or normal) channel not working. All tubes have been replaced - to no avail….what do I check or need to repair/replace?

⟐ Commented January 13, 2024 at 23:51 MST

Fender Champion 600: Main Fuse blowing after nil use for a year.

Sun, 05 Nov 2023 02:22:06 -0700

My amp has been unused and sat in a cold workshop for about 12 months. When I powered it up, I hear a click and nothing. I check the main fust - and it is open circuit. I replace it with a slow blow 500mA as parts list, and it blows again. I have identified the load problem is on the transformer secondary circuit that feeds the diode rectifier section. I am a qualified electronics designer technician, but have no experience of this amp. Any ideas?

Fender Frontman 15r: Replacing front panel mesh or all parts

Sun, 22 Jan 2023 04:42:39 -0700

Hi,

I am looking for mesh part, to replace the front panel of my frontman 15R.
Is someone find it somewhere ?

regards

Fender Frontman 15r: I replaced the volume pot and now the amp seems extra bassy and loud?

Sun, 08 Jan 2023 13:01:57 -0700

What kind of volume pot is required?

⟐ Answered January 08, 2023 at 13:01 MST

Fender Champion 600: Side black chassis screws

Fri, 11 Nov 2022 02:08:03 -0700

I bought this amp with only one side chassis screw (black one on the picture attached).

I’ve been searching all over the internet trying to find one available for purchase but failed to find any. Also I don’t have anything to measure the thread, so can’t find an alternative. If any of you guys know where to find one of those screws or anything similar - I’d greatly appreciate it 🙏🏻

⟐ Commented November 11, 2022 at 2:08 MST

Guitar Amplifier: G 15 GA DR Guitar Amplifier input failure?

Fri, 23 Sep 2022 09:15:17 -0700

I have a cheap guitar amplifier as stated above the model number but every time I put a lead into the input socket there's no sound coming from it no noises nothing I wonder if you could possibly help me in this***

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Rogue G10: Is there a Schematic for the G10 Model Amps?

Sun, 18 Sep 2022 13:54:52 -0700

Is there a Schematic for the G10 Model Amps?

⟐ Answered September 18, 2022 at 13:54 MST

Fender 65 Twin Reverb: Tremolo Effect works then stops working. Is it the power tube?

Tue, 19 Jul 2022 20:50:35 -0700

I've tested the switch, used a shorted jumper plug. I know it's either the tube, optical-isolater or something else in the circuit. is it likely the tube? i've tried resitting the tubes, but the issue is that the circuit rarely works. Sometimes hitting the amp really hard fixes it. The effect will drop completely often and won't work again