Question about Denon DRA-455 Receiver

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DRA-625RA Turned on no output, LCD only one tiny segment on, looks like in standby mode.5A mains good

Had this Denon Reciever since arnd 1986? Never had any issues. Today noticed what sounded like clipping (I use it with a Nikko EQ Pre out/Main in) and Polk Audio Monitor 5's. Just sounded like it lost horse power. Turned it off, and when I turned it back on, nothing. I used the remote. When I engaged the power button on the remote again , the FM strength indicators lit momentarily. No LCD display, except tiny segment,very faint. I checked the remote, battery's, good. Tried manually and just like above. But the indicator(s) #24 OM, show mode, like in stand by. 5A main fuse good. No smell. Took the hi voltage plate off, no burning etc. Couldn't locate secondary fuse. D505/506 etc rec not fried on outside...soo any help would be much appreciated, especially with money being tight. I used to work for a Denon warranty authorized service center in the 80's called Astro Service Center in Burlingame, CA for the Good Guy's etc. I did lots of research back then. Thanks Tony

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  • startouchb1 Jul 24, 2008

    I did check wiring harnesses and any physical connectivity issues. At this time I don't have any tech data. I was thinking it might be one of the power output IC's. And if it does have a blown secondary fuse hidden away, would I still get some data on the LCD (telling me which input is selected? Thanks, T.

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5 Suggested Answers

  • 1 Answer

SOURCE: avr 1804 denon 7.1 reciver

Did you check the Audio-Video slider button in the middle of the remote? It needs to be on Audio, else the remote sends video channel number signals when you press the numbers.

Posted on Jan 09, 2008

  • 54 Answers

SOURCE: Denon AVR-1602 Overheated!

Hold on......there are 4 small resistors in the power supply that open up ( no longer work ). This is a VERY COMMON PROBLEM for 01-02-03 model Denons. They are "flameproof" resistors, so when they burn open, there is no trace of a problem, they look normal. This pic is from a 1601 which is almost identical. The resistors are missing from the picture, but you can see where it is marked R 141, R142, R143, R 148.

If your shop measures across these resistors and they are more than 10 ohms, then they are blown, and this is your problem. These should each be replaced with a 1 ohm 1/2 watt Metal Film Flameproof resistor. You must also remember that the little 1602 is NOT a professional unit, designed to be cranked for hours on end. It is a home theatre receiver.

If this solves your problem, be happy and dont beat your receiver to death. .....THIS BEING SAID.....the other reason that these blow is because one or more channels are blown and drawing too much current from the power supply. IF that is the case, be prepared for a big bill. DO NOT try and fix this yourself, as the entire receiver must be taken apart , right down to the bare chassis to get this board out. Leave it for a professional. Have them check the resistors first, it only takes about 10 minutes to get the cover off, check the resistors and put the cover back on........hope this helps... Rob

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Posted on Mar 13, 2008

  • 1 Answer

SOURCE: denon 1508- no sound but smoke.

perhaps u might consider going to a(n) (unauthorised) repair centre. just check with folks around u or maybe audio forums within your area. authorised agent doesn't always mean the best. i suspect they may have used reconditioned components.

Posted on Sep 01, 2008

  • 85 Answers

SOURCE: Denon DRA-555 Memory won't hold set FM stations when powering up

Most probably the memory capacitor / battery inside soldered to pcb

Posted on Jan 09, 2009

AJIN G
  • 6694 Answers

SOURCE: I called a Denon service

hi,
Blinking of power indicator means the amplifier is in protection mode.First of all remove all the speaker connections from the amplifier. After that power the amplifier and check the protect show or not . if not, then any of the speaker is damaged. If then also it shows protect you have to check the amplifiers hardware.

AV receivers shows protect mode , when there is a hardware fault in side it. Its a warning that some thing is wrong.
Normally AV receivers show this when any of the output amplifier have some problem. There are seven amplifiers in this AV receiver. May occur when the output diver transistors of any of the amplifier become shorted. if the output transistor get shorted this will lead to flow of current through the speakers. To prevent this there is a protection circuit for each channels. One combined output of this protection circuit is connected to the system control. when the any of the output amplifier fails, the protection circuit detects it and switch of the speaker and sent data to the system control. when the system control get this data it will give a warning to the customer through display that PROTECT.
You have to check the amplifier.
For that you need digital multimeter,soledring iron screwdrivers etc
Open the amplifier , then power it on. connect the negative terminal of the multimeter any where in the chase( metal body of the amplifer). then connect the positive terminal to all the output transistors emitter pin one by one . the voltage should be bellow 0.5V. If any of the emitter of the transistor shows voltage more than 0.5V., then that amplifier stage is faulty. Remove the transistors and check it. if it is shot then replace with a new one.
after replacing the transistors do not power up the amplifier directly from the main. You have to put a bulb of 60 watts in serial.
You can do this easily remove the mains fuse. put the bulb in a holder. now you have to wire from the holder. connect one of it to the one end of the fuse holder and the other wire to the other end of the fuse holder. Why using a bulb is, if there is any further problem in the amplifier stage on which the transistors replaced, there is a possibility of the new transistor get damage. if we use a bulb in serial with its mains supply ,when any overload in the amplifier occur the bulb will drop the current, by lighting itself.
After connecting the bulb in serious power on the amplifier. watch the bulb. It should light for one or two second and go dim . if so check the display, is there is protect mode is on or not . if not and come back to normal operation ,then remove the power , remove the bulb insert fuse and check
connect the power and check.
If the bulb shows bright light then there is some component also faulty in the same amplifier. after removing the power you have to check again the amplifier stage of which the transistor is replaced, for any other faulty components.
ok

Posted on May 19, 2011

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1 Answer

Can i hook up an amp & eq to a denon avr3805 if so how?


What are you doing with the extra amp? You can use it as a preamp by connecting a 5 or 5+2 channel amp to the Pre Out section witch RCA cables. If you just want to adjust the EQ of the right & left, put the EQ between the two. If you want to EQ all channels, you'll need 3 equalizers. Isn't 120 watts per channel enough? If you don't have it already, download the owners manual from Denon Support Site.

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Dennon DRA 697ci with bose 901 speakers.....just moved to new house....hooked up stereo and can only get minimal output


I assume it used to work. You need to ensure the connections to and from the active equalizer are all proper. I would think you have it in the Pre-Main loop.

It sounds to me like you have an in/out reversal at the EQ or a dead Tape Monitor selected.

Or MUTING is selected on the DRA.

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Short answer from personal experience.

Get a separate power amp for the 901's. Connect the EQ between the pre-outs and the amp input. Run speaker assignment, levels, etc and have fun.

If you don't have the between-speaker room for proper reflection off the front wall you CAN turn them around and you won't believe the amount of air these things push! I have actually felt it ten feet away after explosions or crashing ocean wave sounds. Now THAT is multi-media.

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1 Answer

I have a Denon AVR 3805 receiver. It does not have a Main Amp in or a pre Amp out in the back. How do I properly hook up the Bose 901 equalizer to this receiver? I use the 901 speakers as surround...


By properly, you must mean WITH the Active EQ.

According to this picture, you're in luck BUT...

http://www.audioholics.com/reviews/receivers/denon-avr-3805/denon_AVR3805_rear_lg.jpg

(Short answer from personal experience.)

There is no way around this part. Get a separate power amp for the 901's if you want to use them in a multichannel way or alongside non-901 speakers. A good 100-wpc amp will do. (I like Carver)

Connect the Active EQ between the Front pre-outs and the amp input. Run speaker assignment, levels, etc and have fun.

Helpful Hint: If you don't have sufficient between-speaker room for proper reflection off the front wall you CAN turn the 901's around and you won't believe the amount of air these things push! I have actually felt it ten feet away after explosions or crashing ocean wave sounds. Now THAT is multi-media.

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1 Answer

Can I hookup a Bose 901 EQ to my receiver and amp?


Your instincts are correct. In fact, the only way the 901's can live in an A/V system is with dedicated amplification.

Put that old amp back to work.

This is exactly how mine are connected.

For connection I would run a pair of RCA cables from the Front L&R Audio Line OUT to the Active EQ's Line IN; then the EQ's Line OUT to a separate amp's Line IN. Attach the 901's to the new amp, run through the receiver's setup procedures for volume, etc and you're done.

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2 Answers

Yamaha rx-797 w/Yamaha ge-60 eq utilizing prein/main out ..and ad


It sounds like you want to use the external amp rather than the internal one. If that is the case, just connect the output of the EQ to the input of the external amp. All you are doing is inserting the EQ between the amp stages now. Using the mx-1 rather than the internal amp is no different.

Dan

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1 Answer

Connect Bose 901 eq to Denon avr 2807


There's good news and bad news. The bad news you need a separate amp because a multichannel receiver with Bose 901's attached as recommended for a standard stereo receiver will only sound right in STEREO on stereo analog material. The other speakers around the room are not designed to receive its Active Equalization and if you engage your Tape Monitor you will NOT BE ABLE TO HEAR DIGITAL sources at all. Tape Monitor is for analog stereo material only and on modern AV receivers it disables any digital inputs so you really can't use the Tape Monitor circuit or attached devices for modern digital sources. However, you can still employ the Tape Monitor with any type of stereo-only sound processor (non-Bose EQ, dbx expander, etc) and the various DSP options to spread 2-channel analog source material around the room. I have a whole stack of analog processors, tape and CD recorders slaved to my single Tape Monitor and then into a dbx400x Program Route Selector. It not only expands my Tape Monitor to handle nearly unlimited external devices but it makes routing for listening or recording easy with simple pushbuttons. But I digress...

The good news. I have a setup similar to what you want to do and it works great! With one caveat - My receiver actually has 5.1 analog Outputs (probably like yours) so I can drive up to 6 external amplifiers if I want to (I drive 4).

A separate stereo amp for the 901's was my solution. I run a Carver AV-406 (5-channel amp) for my 901's in Front, 2 Subwoofers and the Rear Surround channel, with the Active EQ between the receiver Front L&R Outputs and the 901's amp channels. My receiver controls everything and just drives the Center and Surround speakers.

You could get by with just a stereo amp for the 901's. A Carver M-200 is a good efficient amplifier that would have you cooking just fine (2x100W). Run it with the Active EQ between the receiver Front L&R Pre-Outputs ** and the 901's amp channels.
** Front L&R Pre Out >>> Bose EQ Amplifer IN, then
Bose EQ Amplier OUT >>> NEW amplifier IN.

Attach the 901's to the new amp, set its volume to Max and run through your receiver's speaker level setup.


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Hi....you may want to check the speaker fuse, located on the rear of the unit.. sometimes too small wattage speakers get hooked up and the speaker fuse will blow as to not hurt the speakers.
Hope this helps.
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this should result in better audio that that with the bose eq.
will work on the issue of using the eq. with the denon if you like. but, you will likely not improve on the sound with the denon set up correctly.
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