iFixit - Answers With Device "Home Audio Receiver"

Pioneer VSX-821-K: No Power - not surge related

Tue, 30 Dec 2025 18:10:29 -0700

Used this receiver one day, the next it was dead. There was no power outage or surge. There is no display and not responding to the remote or switch. Checked all the power components and they appear to be okay. Getting power to the unit, but not going through the transformer on the power supply board. Relay is not clicking, not getting the signal to turn on. I tried to trace this problem, but I do not have the service manual for this unit and did not see it anywhere on the internet. Checked your site and you do not have it, but thought maybe you can help look for the problems. Any suggestions on what to check next?

⟐ Commented December 30, 2025 at 18:10 MST

Pioneer VSX-824K: receiver HDMI light flashing

Wed, 14 Jan 2026 02:47:03 -0700

Pioneer VSX-824-K HDMI light flashing nothing works. can it be fixed or should I replace?

⟐ Commented January 14, 2026 at 2:47 MST

Pioneer VSX-D608: Volume Control Knob Acting Strange

Sun, 22 Dec 2024 07:09:51 -0700

My Pioneer VSX-D608 receiver (from 1999!) is having a small issue with its volume knob. When I twist the knob, sometimes the volume increases a little and then stops, sometimes it will go the opposite direction, and sometimes it does not change whatsoever. This is a video of the behavior. It seems random, but I can get it sometimes to adjust correctly if I twist the very, very slow. Adjusting the volume with the remote works fine, audio/video functions work fine, everything but the volume dial works perfectly. Is there anything I can do? Or am I stuck with the remote to change the volume?

⟐ Commented December 22, 2024 at 7:09 MST

Home Audio Receiver: Fuse blows instantly upon powering on

Fri, 28 Mar 2025 00:05:29 -0700

Hello!

My amp is blowing fuses instantly. I would love to get it working again.

It a Fisher amp, CA-27OA. I know it's not the best, but I want to fix it.

I'm not sure what to test for it. I'm new to electrical work, and I'm learning. :) I do have a small multimeter, I just need to know what settings and what to test.

Also, if more pictures are needed, I will supply them ASAP.

Thanks!

-Liz

The screw driver is pointing to the fuse port (?) In question.

⟐ Edited March 28, 2025 at 0:05 MST

Pioneer VSX-821-K: My receiver turns on and then shuts back off

Fri, 08 Jan 2021 08:03:21 -0700

My receiver turns on and then powers back down

⟐ Answered January 08, 2021 at 8:03 MST

Denon AVR-1909: AVR-1909 no audio output

Thu, 23 Jan 2025 21:35:16 -0700

I was hoping someone might help me find a troubleshooting breadcrumb to follow. I don’t want to have to take it entirely apart and test every capacitor, resistor, fuse, and transistor to sort the issue out.

I am looking over a Denon AVR-1909 receiver. The unit will output video but no audio.

Steps I have tried:

Re-seating a headphone jack. I see display note the insertion and removal of the headphones and I can hear the relays clicking over as I insert and remove the jack.

No audio outputs to speakers or headphones for any input selection, including the AM/FM tuner.

Protection history is empty

Resetting the microprocessor did not change the symptoms.

I inspected the inside of the unit for any visible damage, bad solder, blown caps, etc and found none.

Thanks in advance!

⟐ Edited January 23, 2025 at 21:35 MST

Home Audio Receiver Denon AVR391: Why does the receiver turn off after pushing the power button on?

Thu, 26 Nov 2020 19:57:37 -0700

So when I turn on my Receiver from Standby mode it briefly powers on then makes a signal noise error like you are watching static television then the Receiver turns off and a Red Ring flashes around the Power button. I have tried opening the tv hutch door where the Receiver is at to give it more ventilation because I think that could be a possible culprit. Does anyone know anything specific to this brand or model?

Denon AVR391

⟐ Commented November 26, 2020 at 19:57 MST

Home Audio Receiver Denon AVR391: Why is a red light flashing?

Mon, 30 Sep 2024 16:26:50 -0700

When the sound is too loud the receiver shuts off. Now a red light is flashing around the power button and the receiver will not come on. I have already tried to reset it.

⟐ Commented September 30, 2024 at 16:26 MST

Pioneer VSX-530: will turn on then shuts right off

Wed, 15 Oct 2025 05:43:15 -0700

I have a pioneer VSX530 and I turn it on and it light up then shuts off right away

⟐ Answered October 15, 2025 at 5:43 MST

Home Audio Receiver: No Display on Denon AVR 5700 after turning on

Mon, 28 Aug 2023 12:14:37 -0700

Unit turns on just fine. I can rotate the selector knob and choose different devices. But Display never comes on. Any Clue?

⟐ Answered August 28, 2023 at 12:14 MST

pioneer vsx 1020: Receiver turns on but doesn’t stay on

Fri, 23 Dec 2022 22:55:13 -0700

It turns on but after 2 secs turns off

⟐ Answered December 23, 2022 at 22:55 MST

Pioneer VSX-D608: Relay is clicking on and off

Wed, 02 Sep 2020 15:56:00 -0700

Hi,

I suspect my Pioneer VSX-D608 has a power supply issue. When I turn it on from standby, the screen turns on and there’s sound from the speakers. But after a few seconds, or after I turn the volume up, I hear the main relay from the power board click and after that the receiver restarts.

I wonder how to troubleshoot this issue - what is the main reason for the relay switching? is the system shorted somewhere or is it a bad component?

Thanks!

⟐ Commented September 02, 2020 at 15:56 MST

Home Audio Receiver Denon AVR391: New Remote still won't control volume

Mon, 26 Feb 2024 07:29:59 -0700

New remote still won't control volume

The purchased a new remote to solve this and it still doesn't work, something wrong in the actual receiver?

⟐ Commented February 26, 2024 at 7:29 MST

Kenwood ELEVEN III Reciever: Sound quits and it clicks

Tue, 22 Sep 2020 14:12:36 -0700

Great Kenwood Eleven III reciever works for a while then goes silent after a click sound is heard

⟐ Commented September 22, 2020 at 14:12 MST

Home Audio Receiver: Why does my reciever say overload

Mon, 31 Mar 2025 00:02:52 -0700

My reciever says overload on the display and no functions work.

⟐ Commented March 31, 2025 at 0:02 MST

Home Audio Receiver: Pioneer VSX-531 Receiver does not power on (HDMI light blinks)

Sun, 26 Jan 2025 12:34:35 -0700

Pioneer VSX-531 AV Receiver

5.1-channel receiver with 5x130 Watt, 4 HDMI ports, HDCP 2.2, MCACC automatic calibration, Advanced Sound Retriever, Bluetooth and USB

I have a digital copy of the user manual | Need a schematic or wiring diagram

Expert researcher / Novice electrical repair experience (I know enough not to be dangerous, and can fix most basic electronics given enough time)

Source: Found “Free” on OfferUp

Issue:

Unit does not power up
When plugged in, HDMI light flashes (indicating error state)
No other lights illuminate, standby/on button doesn’t function

Error Diagnosis:

(Per user manual): The HDMI indicator blinks and the power does not turn on.

The receiver may have a serious problem. Do not try switching the receiver on. Unplug the receiver from the wall and call a Pioneer authorized independent service company
That’s helpful…?

Troubleshooting:

Able to temporarily clear error by simultaneously pressing “Advanced Surround” and “Standby/on” for 5 seconds
- After doing so, unit clicked, initialized, something got hot & smoked for a second
- Unit went back into safety power off
- Back to HDMI flashing error state

What I’ve done:

Isolated component that was getting hot (smoking): Resistor R14FL
Uninstalled the MOSFET / heatsync daughter board (720-07995-000-0S) from the unit, this board contains the overheating resistor
Resistor tests same ohm resistance (.34) as adjacent resistor on neighbor MOSFET

Pix

Burning Resistor (circled in red)

Photos of the MOSFET / heatsync daughter board (720-07995-000-0S)

Really appreciate any help that the forum can offer :-)

Cheers,

Lou

⟐ Commented January 26, 2025 at 12:34 MST

Pioneer VSX-832: My display shows "Thermal Error"

Fri, 17 Nov 2023 11:39:53 -0700

After a power outage my receiver won't turn on. It shows "Thermal Error" in the display for a few seconds and then turns off again. My guess is it was a voltage peak when the power got back on that killed it.

I tried contacting Pioneer, but they just told me to contact a service shop. That will probably cost more than it is worth so I will not do that, but still it will be a shame to have to throw away a 5 year old receiver if it easily can be fixed...

I tried searching for the schematics for it, but I had no luck.

Does anyone here know what this error is and how to fix it?

I live in Norway btw so it is rated for 240V if that makes a difference.

⟐ Commented November 17, 2023 at 11:39 MST

Pioneer Elite PRO-RO6U: Power issues with my receiver.

Sun, 04 Jun 2023 17:57:08 -0700

The issue started with the receiver. Suddenly the “On” blue light, “standby” red light, and “recording” orange light all came on and the TV didn’t came back on again.

Side note: whenever I connect the black system cable to the TV, the light on the TV goes from blinking red to blue to a STILL red.

My guess, perhaps I was using an incorrect power cable, but never had an issue for the first few months.

⟐ Commented June 04, 2023 at 17:57 MST

Home Audio Receiver: Help t-shooting with schematic - Onkyo tx525sv overheating resistors

Sat, 20 Nov 2021 13:34:50 -0700

This has several resistors and an area about the size of a quarter that is looking a burnt brown on the pcb near the front of the unit. There are about 5 or 6 ringed resistors total in this area. Tested and results below. When using the tuner/radio portion all seems to be fine (uses the bypass mode for radio). When using the bypass feature (which only utilizes the 2 rear channels I believe) for the video/theater audio, this works too. The option to use anything that utilizes the DSP portion is a intermittent. Just a low hum or his is presenting thru speakers sometimes. Shame to toss this in the trash because this receiver is an oldy but goody. Seems like I could replace a few resistors and all would be well? Hopefully the community here will be familiar with the issue. Thanks in advance! I have located a service manual but lack the knowlege to read it (link below). I also have pics of the overheated resistor location.

Actual board part number (I think) is ncar-5121. These are numbers from the board anyway.

I've resoldered all of those resistor and transistor contact points plus re-soldered all the contacts on about 1/3 of this board. I was able to get my magnifying headset on and locate a few bad / cracked solder points as well in other areas. Improvement has been noticed as not all of the resistors listed below are as hot as they were with the exception of the 3 listed below.
https://www.dropbox.com/s/m66gysdhfqyojz...

Svc manual https://www.dropbox.com/s/9sjwtrqncm77du...

The resistors and their tested values are:
r930 = 118.8 ohm HOT TO TOUCH!
r929 = 118.5 ohm HOT TO TOUCH!
r928 = 18.4 ohm HOT TO TOUCH!
r935 = 22.1 ohm
r923 = 1.5 ohm
r925 = 11.4 ohm
r926 = 11.5 ohm
These seem to be within range?

Values for outputs for these voltage regulators tested by touching the negative to the G (?) Terminal and pos to the O terminal (is this the correct way to test?):
Q921 = + 11.7v
q922 = -11.6v
q923 = + 6.02v
q924 = - 5.8v then drops to 0 usually (this one drops voltage after heating up)
q925 = + 5.5v

I am currently at a standstill and need help with schematic. I specifically need help with the next troubleshooting step. The service manual is provided and I believe the resistors and regulators in question are on page 36.

If components need replaced could you provide suggestions on comparable replacements if needed? Where to get? Thanks. I've been studying on how to test these voltage regulators as well. To repeat - I do not know how to read schematics. I wouldn't have gotten this far without help. It took a bit of hard study to be able to read that schematic and still don't understand much but am able to limp thru so far :) I look forward to the next step :)

⟐ Commented November 20, 2021 at 13:34 MST

Home Audio Receiver: Xfinity remote won't turn on Yamaha receiver

Thu, 29 Jul 2021 14:07:25 -0700

I installed a Yamaha RX-V385 receiver, and paired the Xfinity X-15 remote to it. The only thing controlled is the volume. Why won’t it turn the receiver on?

⟐ Commented July 29, 2021 at 14:07 MST