iFixit - Answers With Device "Home Audio Amplifier"

Home Audio Amplifier: Powersoft digimod 2000hv PSU repair

Wed, 29 Apr 2026 08:16:31 -0700

Hello. I think that PSU on my Digimod 2000hv has died. I started checking the transistors and mosfets and I figured that Q2 (12N60A4D) and another chip responsible for DC voltage are dead. Is there anything else i need to check before replacing them? I will also repalce Q1, which is the same as Q2.

⟐ Commented Nisan 29, 2026 at 8:16 GMT-7

Frequency Amplifier Marshall Kilburn: Why doesn't produce sound on the speakers

Sun, 19 Apr 2026 06:49:50 -0700

My mini amplifier I have 2 years using it and it doesn't provide any sound on the speakers I don't know why course I opened it n checked the power board is fine n the is no sign of blown devices

⟐ Commented Nisan 19, 2026 at 6:49 GMT-7

Harman Kardon HK3700: Amplifier not making sound why?

Sat, 18 Apr 2026 07:00:21 -0700

Sound not hearing

⟐ Commented Nisan 18, 2026 at 7:00 GMT-7

Kicker CXA300.1: This amplifier are not connected with bluetooth

Thu, 16 Apr 2026 03:42:24 -0700

This amplifier are not connected with bluetooth

After damage

Home Audio Amplifier: Why does my bass and volume buttons make scratchy noise and bass go aw

Thu, 16 Apr 2026 03:17:41 -0700

buttons not working properly and why does the bass goes suddenly off and volume

Frequency Amplifier Marshall Kilburn: Why is my amplifier keep turning off

Mon, 30 Mar 2026 05:33:24 -0700

My amplifier just keeps turning off when I turn up the volume

⟐ Answered Mart 30, 2026 at 5:33 GMT-7

Home Audio Amplifier: Why does only one of the two channels work

Thu, 26 Feb 2026 23:55:16 -0700

Amplifier only play on one channel

⟐ Commented Şubat 26, 2026 at 23:55 GMT-7

Home Audio Amplifier: Audio amplifier has short circuit

Wed, 25 Feb 2026 00:39:06 -0700

Hi,I am repairing an audio power amplifier…I don't see any damaged parts but the light bulb indicates that it has a big short circuit…its peavey cs 2000 power amplifier

pls help

⟐ Commented Şubat 25, 2026 at 0:39 GMT-7

Home Audio Amplifier: How to conection of amplifier board 6283

Tue, 24 Feb 2026 08:17:18 -0700

⟐ Answer edited Şubat 24, 2026 at 8:17 GMT-7

Home Audio Amplifier: How to fix a protect display

Sun, 01 Feb 2026 07:39:04 -0700

I have a onkyo tx sv424

Gow i can fix it

I have CONNECT a pair of tower speaker that never used or test BEFORE,

Do you think that speaker can blow a power transistor and display now protect on display

Any ideas

⟐ Answered Şubat 01, 2026 at 7:39 GMT-7

Home Audio Amplifier: Sony TA-V7 amplifer has no right channel output

Sun, 25 Jan 2026 21:53:24 -0700

Hello! I picked up a vintage amp that was having intermediate issues with the output on the right channel and now no audio will come out of that channel. I've tried switching the speaker wires and panning the audio all the way right but now no sound will come out at all. Any advice and help is appreciated!

⟐ Answered Ocak 25, 2026 at 21:53 GMT-7

Home Audio Amplifier: Crown Cdi 1000, both ch. signal LED’s jumping, no input audio, no out

Wed, 26 Nov 2025 21:55:59 -0700

I have a Cown CDi 1000 that’s has movement in the signal LEDs on both channels , it bounces from 1 green to two. The problem is that this happens when no signal is being applied and when you do send signal you get no audio nor do the LEDs react. Has anyone had this expierence? This is a dual channel issue, no faults. Any thought on where I should poke around? This CDi1000 is a 2009 model, I repaired the power supply, mainly the kick start area, the 48.7k resistors were pretty toasty, who ever had it before me did a number on C196 so that was replaced too. Could U14 cause this kind of issue?

⟐ Answered Kasım 26, 2025 at 21:55 GMT-7

Home Audio Amplifier: XTC Amplifier magnet Wire has been burned,need help

Wed, 26 Nov 2025 04:22:02 -0700

My magnet wire have just bust by just putting 8 guage performance power cable on a car battery

Home Audio Amplifier: Sansui AU-X410R - no bias voltage on either channel. PIC incl.

Thu, 16 Oct 2025 23:06:36 -0700

Hi guys,

a little stumped with this one. I picked the amp up for next to nothing from a local charity shop. Fired it up via my dim bulb, and it worked, but only just. The output/volume is extremely low. I measured voltage across the emitter resistors, and I'm getting 0 on all 4 of them.

I have checked the power section, and the main rails, and I'm getting around 45v per rail, so that seems ok, Output transistors appear to be ok, and measure fine.

To complicate matters, I cannot find a service manual/schematic for this amp anywhere.

Any help, pointer, tips, would be much appreciated!

Thanks!!

Home Audio Amplifier: Why is my amp staying in protection mode

Mon, 13 Oct 2025 08:50:11 -0700

Protection light stays...fuse is good

⟐ Answered Ekim 13, 2025 at 8:50 GMT-7

Home Audio Amplifier: I have a Sansui 550 Classique amplifier -need help

Tue, 16 Sep 2025 03:48:21 -0700

My Sansui 550 Classique amp will not turn on, just humming sound and we have blown multiple fuses. Now even when replacing the fuse we get nothing.

We’ve checked the speaker wires. Receiver turns on. Amp shorts out after a crackle-hum sound.

any advice for repairing this?

⟐ Commented Eylül 16, 2025 at 3:48 GMT-7

TEAC GSA-5300 stereo integrated amplifier: Doesn't want to take out sound when I connect to the speakers

Sat, 23 Aug 2025 09:21:07 -0700

Amplifier don't want to take out sound

⟐ Commented Ağustos 23, 2025 at 9:21 GMT-7

Home Audio Amplifier: Adding an external audio input to this excellent boombox

Mon, 11 Aug 2025 11:17:41 -0700

The JVC RC-X610 boombox, like a lot of JVC audio equipment, is surprisingly good but it lacks an external audio input.

Even for an experienced electronic engineer the PCB's are undecipherable without a service manual and schematic.

I have found an very expensive copy of the service manual on eBay. Where do these sellers find their manuals I wonder?

Can anybody point me to a repository of JVC service manuals or specifically, one for the JVC RC-X610 ?

⟐ Answer accepted Ağustos 11, 2025 at 11:17 GMT-7

Home Audio Amplifier: VSX819H amp wont enter service mode

Fri, 08 Aug 2025 08:12:33 -0700

Hi, My pioneer VSX 819h went into protection mode. It now won’t enter service mode. I’m following the service manual. The only thing it does is turns on for 4-5 secs when pressing power button+adv-surround which according to the service manual is used for clearing the error counts. Thanks

⟐ Commented Ağustos 08, 2025 at 8:12 GMT-7

Home Audio Amplifier: Denon PMA-757 Relay is not turning on

Fri, 25 Jul 2025 07:42:24 -0700

Hello,

I have a Denon PMA 757 and its power relay is not turning on. Therefore there is no power. All fuses are OK. My observations; 1) R301 is overheating 2) Transistors around R301 seems to be fine 3) All my measurements around R301 and transistors show +/- 50 V and this does not match some of the values indicated on Service Manual,

I would highly appreciate if someone can help me.

Thanks and best regards