Question about Marantz SR4500 Receiver

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Hi, i have a sr4500 and i get hissing sound

Hissing on all audio modes and only sound works on pure direct! any ideas?

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1 Answer

What's your problem?no sound


Put your unit in Direct Mode or Pure Audio Mode. If you now have audio in your front right and left channels only then you have a problem with your DSP circuit. If you do not have audio at all, then check your + and - 15 or 12 volt lines. If the voltage is missing then you probably have a bad regulator.

May 17, 2012 | KLH R5100 Receiver

1 Answer

We have a Marantz sr4500, everytime we put it on it makes a Zzzzzz sound and then it turns off with a loud "buk" sound and shows protect on the amp's screen, after few seconds the amp turns...


It is not so easy to probe into to find a protection fault condition. The fault can be your output drivers- the MOSFETS/IC's fitted for both the channels, Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise like a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.In this case I think that some capacitors are faulty as when the set is put on it charges on to make the amplifier work. Possible fault in the protect circuit or preamp.
You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board, maybe the protect circuit by itself is shutting off due to a faulty bias , maybe a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the protect is off then check for short on the speakers.

May 11, 2011 | Marantz SR4500 Receiver

1 Answer

Tanaka htr 5660 was working fine. Not sure what button I hit, but sub and rear surround quit working. I have followed troubleshooting guides and to no avail. Connections are all fine as well


You must have hit the DIRECT button . In this mode it produces pure stereo sound by shutting down the multichannel Digital Sound Processor (DSP). Only your front Left & Right speakers will work

Mar 10, 2011 | Yamaha HTR-5660 Receiver

1 Answer

Tx-ds747 no display light,when powering on only stand by mode and the volume knob has light ,how to fix it.


Sounds like the "Pure Audio" mode is turned on. This mode is designed to use the amps power to dedicate to audio processing and sound quality. It turns off all front panel lights and video processing. Check you remote or thr front panel of the Onkyo for a "Pure Audio" button.

Nov 23, 2009 | Onkyo TX-DS747

1 Answer

I have a AVR 3805 running my theater room. I'm not getting sound. How do I reset it? My sound guy did that once before and it worked. He cant get here for 2 days though... Any ideas


Turn off main power, press "direct" and "pure direct" simultaneously while turning main power on. The display starts blinking, reset is done.

Oct 31, 2009 | Denon AVR-3805 Receiver

1 Answer

No sound in listening modes except pure audio and direct. Was working fine and just stopped one day. Connections are all good. Surround sound seems to be broken?


Check the input mode on the reciever so that they are set for dual, rather than just digital or analog. It might be set for analog and your using a digital optical in cable. Also make sure DTS mode is turned off, unless your watching a DVD that is dts enabled.

Aug 06, 2009 | Onkyo TX-SR804 7.1 Channels Receiver

1 Answer

Yamaha stereo only works on Pure Direct


It sounds to me like an audio enhancement filter is malfunctioning. The pure direct on / off is a sound filter to alter the sound performance of the receiver. There is a rare possibility that there is something wrong with one of your speakers- causing certain circuits in the receiver to malfunction. A way to check for this is to connect only one speaker and an audio source. test each channel first(without pure direct) by connecting the speaker to a channel and then disconnecting it, and connecting it to a different channel repetedly, until you have gone through all of the channels. If you really wanted to pinpoint such an anomaly, then you would need to do it with every speaker through all of the channels to make cetain that this is not the case. But then again this is not very likely. I would personally just use the mode that seems to work, because something is obviously malfunctioning, or possibly burned out. And repairing it is most likely costly! I hope that you can get something out of my answer! sorry! Good Luck!

Jun 11, 2009 | Audio Players & Recorders

1 Answer

No sound other than from direct stereo or pure direct. Denon AVR 2808


You can try this reset precedure below, but it sounds like you may have a DSP board problem. This is a new model of Denon, it should still be under Denon's warranrty, it has a 2 year warranty. If this does not help, you need to take it in to be serviced. If it is not under warranty, you will not like the cost of the repair. A new DSP board usualy cost about $300 and then you must pay for the labor. It is not cheap. This reset procedure has been know to work some minor miracles, lets hope it works one for you.

1. Switch off the unit.
2. Hold the following STANDARD button and DSP SIMULATION
button, and switch on the unit.
3. Check that the entire display is flashing with an interval of
about 1 second, and release your fingers from the 2 buttons
and the microprocessor will be initialized.
Note:��If step 3 does not work, start over from step 1.
�� All user settings will be lost and this factory setting
will be recovered when this initialization mode.
So make sure to memorize your setting for restoring
after the initialization.

Jul 12, 2008 | Audio Players & Recorders

1 Answer

Sound is working only in mode PURE DIRECT


TRY PUTTING DVD PLAYERINTO ANOTHER DIGITAL IN PUT, ALSO CHECK DVD OUT PUT IS STILL BITSTREAM.
IFF YOU STILL HAVE A PROBLEM CHANGE THE CABLE,AND IFF IT STILL FAILS 2 WORK TAKE AMP 2 YOUR DEALER.

HOPE THIS HELPS.

CABLE GUY.

May 19, 2008 | Denon AVR-4802 Receiver

1 Answer

Getting out of Pure Direct mode


One way to solve that is to use your remote. There are modes i the same area - direct mode is one of them. Chose one of the others next to it.

Mar 09, 2008 | Denon AVR-2807 Receiver

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