Question about Denon AVR-1906 Receiver

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When i turn it on it startts up then immediately goes to a red flashing light i have checked all the connections following the problem page of the manual

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If your amp looks like it's going to work as normal (ie the front display lights up as it should etc), but then the amp goes into protection mode when the anti-thud circuit times out, then I know what's likely to be wrong.

It's one of the power amplifier channels which has gone faulty.

I just found this out after having this problem with my AVR-1906.

I took the amp apart and de-soldered the suspected channel power transistors (centre channel in my case).....and hey-presto! it fired up as normal (obviously the centre channel would be out of service).

I have ordered the replacement transistors from Farnell (UK) at a miserly cost of around £2-£3 each.

Just waiting for them to arrive.

An alternative is, if you don't use all your channels, take the transistors from a known working but not needed channel and swap them over with the duff ones.

Hope thats of use!

Posted on Aug 16, 2008

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No sound and light on input selector knob is Flashing. Light only flashes when speaker switch has been turned to A, B or A&B.


This can happen if there's a dead short in a speaker wire or if you're using very low impedance loudspeakers at high volume for an extended length of time. If the protection light came on due to a speaker wire short, low impedance condition or a bad speaker, the receiver's power will need to be turned off to reset it. Before turning the power back on, all speaker wire connections should be checked for their integrity at the receiver side and at the speaker side. If the protection light goes on immediately after you turn on the receiver, disconnect the speaker wires at the receiver side and retest. If the receiver's protection light goes off, then there would still seem to be a problem with one channel's speaker wires or speakers. Connecting them one by one and retesting should allow you to find the problem speaker or connection.

Jan 14, 2015 | Audio & Video Receivers

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When I power it up it make a click the the RED LIGHT starts FLASHING and then it's off and flashing. A week ago it was fine, then it started to CLICK and the RED LIGHT FLASHED, I pushed power got...


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

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The power light blinks red! it can't turn On!


"If your 8002/7002 goes into protective mode (red power light flashing at two times per second) the receiver will not operate until it is reset. First try the reset procedure on the bottom right corner of page 81 in the manual.

If that doesn't work, press and hold the following three buttons on the front panel until the unit resets:

Pure Direct
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This latter procedure is not in the manual and I can't fathom why, as it can save the inconvenience of a trip to the service center."

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I have a Denon 1708 receiver. When I push the "on" button, either on the unit itself or using the remote, the light flashes green for a few seconds, then flashes red. When it turns red, all of the info...


Your result indicates the unit is not passing its power up self test. The first thing to try would be to remove all connections to the unit and try to power up. If it still mis-behaves, the unit has an internal problem best left to pros unless you're pretty good digging through circuitry. If it comes up stable, then reconnect things one at a time until the issue occurs again. Detach the offending connection and look for issues in the cables or the connected unit.

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Unit only stays on for 4 seconds then turns itself off.


This is a short or unstable ohm load. Remove all speaker wire connections to see if the amp will stay on.
If the problem goes away when disconnecting the speaker wires try this:
1) Check volume level on zone one and zone 2 if connected. If it is too high the amp will go into protect mode and shut off exactly as you described.
2) Make sure no wires are touching any other wire or the metal surface of the amp. This will cause a short and send the amp into protect mode.

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After turning ON the power/standby switch, the unit(receiver) display comes ON (green light) then after approx.4-5 seconds the display goes OFF and the unit defaults back to the standby mode (red light). I...


Is the red light flashing at first?
The unit may be going into protect mode. Lets hope it has done the job and the receiver has protected itself from failure.
Protect mode can result from speaker wires touching each other or the Amps2_bing.gif metal case. Check that first.
It can also be caused by unstable ohm loads if too many speakers2_bing.gif are connected to any of the outputs especially zone 2.
If you can remove all speaker wires and turn the unit back on. If it stays on, turn the volume down on the main zone and zone 2 if connected. Then reconnect speaker wires.

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How do i disconnect my HBH PV703 Headset from a damaged phone and connect it to another Phone


Step 1 - To reset your Bluetooth headset:
  1. Press and hold down the volume keys "+" and "-" on your headset at the same time, until your hear a beep and the light flashes red and green alternately.
  2. Press and hold down the volume keys on your headset until it is turned off. The headset is now reset as it was when purchased.
Step 2 - To pair the headset with your phone:
  1. Make sure the headset is turned off.
  2. Turn on the Bluetooth function and Bluetooth visibility in your phone (This makes the phone visible to other Bluetooth devices).
  3. Place the phone within 20 cm (8 inches) from the headset.
  4. Press and hold down the call handling key on the headset until it beeps, shows a steady green light and then flashes red and green alternately. If the indicator light only flashes red or green, simultaneously press and hold down both volume keys until the headset beeps and flashes red and green alternately.
  5. If your phone supports auto pairing, press "Yes" when you are asked to add the headset to the phone. If not, check your phone User Guide on how to pair the Bluetooth device. If required, the headset passcode is 0000.
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Power on but no display on Denon AVR 3705


By now the folks who asked this have certainly solved their problem, but in case anyone else has this same question:
If the color change from red to green on the Power button indicator light and stays that way, the receiver is most likely working fine, it's just that your front-panel display is OFF.
1. Check the DIMMER mode by pusing the buttom on the front panel -- it may be set to OFF.
2. Push the PURE DIRECT button on the front panel (or remote control) -- it may be ON, which turns off almost all of the front-panel display. (Alternately, change the AV source, which turns Pure Direct OFF.)
HOWEVER if the power light flashes rapidly, the amp's overload protection circuit may have been triggered by a feedback loop or other problem, such as a shorted or bad cable connection. Turn off the power and unplug the receiver. Look for problems starting with shorted speaker wires or cables. Then make sure the receiver's not still hot (wait 5-10 minutes to let it cool), and remove obstructions or anything blocking the top vents. Plug it back in and power up again. Immediately change the Source selector to something unconnected, and turn the Volume DOWN just in case there's a feedback loop (hum/squeal/noise that can overload things and cause the protection circuit to trip again). If you can see the display, go to a low level (around -50dB should be fine) before the delayed speaker amp output clicks on. Then carefully switch back to the problem source -- if that's the problem, switch off again immediately and re-check all of the cable connections at both ends, the receiver and the source component, and make sure you don't have a feedback loop due to a recording device feeding back a signal. All VCRs and CD/DVD-recorders should be hooked up to the VCR, DVR or TAPE/CD-R "IN/OUT" jacks with IN being connected to the cables marked OUT on the deck and vice versa. (That confuses even us experienced guys sometimes!) Also, no MONITOR video or audio outputs should be connected to the recording decks, nor should the TV outputs be fed back to the recorders. The same goes for the digital IN/OUT jacks for CD recorders; use only the same number IN as OUT for each component (Optical IN/OUT #4 and #5 are the two digital IN/OUT pairs on the AVR-3803).

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2 Answers

Overload...


Pioneer posted this on it's Canadian Web Site:

Poor wiring connections, bad wires or a bad speaker may cause this. As you increase the volume, you will increase the amount of current you are drawing from the receiver. To troubleshoot this issue, try the following:
  1. Disconnect each speaker wire connection. Inspect for any frayed or damaged wiring and replace it.
  2. Check the impedance of the speakers; make sure they are properly rated for your stereo. In most cases, they need to be 8 ohms. Only a few Pioneer receivers will support lower impedance.
  3. If the problem still continues, try these steps:
    1. Turn the receiver off.
    2. Remove one speaker.
    3. Turn the receiver on.
    4. Increase the volume.
If the receiver overloads, repeat steps 1-4 (selecting a different speaker each time). If you disconnect a certain speaker and the receiver no longer overloads, have this speaker checked at a service center. It could have a bad speaker component, like a tweeter, sub-woofer, or even a bad crossover.

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