20 Most Recent Denon AVR-E400 - Page 4 Questions & Answers

The receiver is in protection mode, which means you have a problem in the power supply unit ... needs servicing.

Kind regards

Denon Audio... | Answered on Mar 07, 2019

I fix these receivers for a living and can tell you with certainty that the problem you have is one that will require the replacement of several parts. You will need to know how to solder and be able to purchase the proper parts.

There are 3 different most common reasons that they go into the protect mode, which is what is happening to your unit now.

1. Has a blown output channel in the amp that will require the replacement of both output transistors of the bad channel and the replacement of several resistors and a coupld of other transistors and a capacitor in the affected channel. You wil lneed a multimater to be able to check and findout which channel is bad. I can supply you with the part numbers you will need for the repair if you plan on doing it yourself.

2. A voltage regulator in the power supply is bad. They have several voltage regulators and it is a common problem for one to go bad. Once again you will need a multimeter to check and find which one it is and then get the part and replace it. I can supply the part numbers for you if needed.

3. A resistor that supplies the amplfier circuit has opened up and needs to be replaced. This is the least expensive repair, but not as common as the other two. Only one resistor would need to be replaced. You need a multimeter to verify that it is bad, I can tell you which resistor to check and loet you know by the readings with the meter if it is bad.

Those 3 problems are the most common reasons for the receiver to shut down like your is doing. I work at an authorized Denon repair center and have repaired hundreds of Denon recievers so I am certain that the problem you have is one of these three listed.

Let me know if you plan on trying to fix this yourself and I will guide you thru the repair and even email you the service manual for a reference to do this repair. It is not an easy job, but it is the problem you are having. As I said before, I fix these receivers all the time myself, and I know how to fix them. Let me know if you want further help with this.


Denon Audio... | Answered on Feb 27, 2019

“It used to work perfect until I put it in storage for 8 years. When I hooked it up There is no sound and it won't switch the inputs.” After 8 years , some capacitors used in switch input circuit, (capacitors used in DIR, DSP and DAC circuit make no sound)may be dry up. Replace them all to fix the problem.

Denon Audio... | Answered on Feb 19, 2019

Your denon amp amp does not match and work well
in some players for instance "Samsung" no pictures
and sound via HDMI input. Only replacing players
to another brand such as LG can fix the problem.

Denon Audio... | Answered on Feb 17, 2019

If there is a fuse carrier on the rear panel, please open it and check the fuse. This is should be the first to go. Replace it if it is blown out.
If the fuse is OK, the power supply unit inside the Denon needs to checked. This can be done only by an approved service provider.

Denon Audio... | Answered on Feb 15, 2019

Swap the left and right inputs over to see if it is a problem outside the amp and if not, swap the speakers over left to right, right to left, if the fault goes to the other speaker, the amplifier is in need of service.

Denon Audio... | Answered on Feb 10, 2019

This is a normal condition when a capacitor or more on the power board has failed, this is a common issue however I can not assure you that this is your issue. I also advise against opening it up to work on it but if you did you want to locate any bulging or obviously distressed capacitors.(oozing liquid, extra plum-stolen, smelly or melted parts you can also look for weak spider joint as the cold air makes us keep the heat on more and along with prolonged use can weaken solider joint in some electronics good luck.

Denon Audio... | Answered on Feb 01, 2019

“Is it possible to program a brookstone universal touch screen remote to the receiver without the factory remote?”
No need to program a brookstone universal touch screen remote to the receiver. “If so how please?”
Just google 'denon app download' will get help.
Try to download "denon app for Android" (denon remote app) to control the amp .

Denon Audio... | Answered on Jan 30, 2019

check SMPS of Denon AVR X3300W located at AC in.
The voltage 5.26V may be
down. If current protect ,
check ALL components of
power amp OR replace them ALL.

Denon Audio... | Answered on Jan 28, 2019

I have the same issue with my DENON receiver. I know that there must be a setting in some menu someplace. But how can you read the menu when the display is too damn dim, right? I have searched through the buttons on the remote and pressed all of them after changing the batteries twice. They are either unsmart or they don';t care. Any way it sucks

Denon Audio... | Answered on Jan 26, 2019

Denon PMA 250SE does not have a RIAA phono preamp.

for some info about these preamp and details here;

Phonopreamps.com Home Page

Note: Choose a better quality regulated power supply,

for these preamps.

Although an updated turntable with USB can be used

without the need of such RIAA phono preamp.

Denon Audio... | Answered on Jan 18, 2019

How do I get it on stand by as without the receiver being on standby cannot get the Denon instruction on my TV screen. It is impossibe to do so. When in standby mode, CPU voltage supply is shorted to ground. CPU shuts down. Without receiving any signals from CPU, both HDMI input and decoder do not work. They work only working CPU is fully awake.

denon. jpg-5ulrdo03xjhedctpc1vacklq-1-0.jpg

denon digital board. jpg-5ulrdo03xjhedctpc1vacklq-4-3.jpg

Denon Audio... | Answered on Jan 11, 2019

"Your best option will be to use the AVR-5700 manual, the next in the series. Operationally, they are nearly identical, and the usage procedures are substantively the same. The main difference being that the 5700 supports a few newer audio compression formats."

Denon Audio... | Answered on Jan 04, 2019

Try and unplug all the cables from the unit and see if it still turns off with nothing connected. If not, connect one speaker at a time to see if there is a short

Denon Audio... | Answered on Jan 02, 2019

Check the speaker terminals. If they are crossed. You may have activated the overload circuits. also you may have too high ohm speakers. Connect 8 ohm speaker and try again. Make sure wires are correct + to + and - to - on both ends. If you have all this it should work. Good luck.

Denon Audio... | Answered on Dec 30, 2018

Not much to set up - make sure the turntable is level and stable and the tonearm adjusted to the correct playing weight for the cartridge/stylus and then connect the turntable to a suitable RIAA corrected preamp input - low impedance high sensitivity for magnetic cartridge and high impedance low sensitivity for ceramic or piezo cartridge. The speakers are best placed far enough apart for good stereo separation and on a substrate that doesn't resonate, if necessary placing them on something like concrete paving slabs or fitting them with pointed feet to bite through carpet.

Denon Audio... | Answered on Dec 27, 2018

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