20 Most Recent Dual DWM-3900 System Questions & Answers

Had the same problem; here's what i did. Take DVD out of Receiver, close door to receiver and hold down stop button on receiver itself for five(5) seconds. changes should take effect and progressive scan screen should revert back to sanyo screen.

Dual DWM-3900... | Answered on Jan 13, 2013

Make sure it has enough ventilation and you're not driving it too hard into a too-small load.

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.

Check for loose speaker connections at the speaker as a root cause for intermittent shutdown.

Dual DWM-3900... | Answered on May 01, 2011

You'r fans are still good just the board is not giving it any power. I took myne apart and blew it out with my compresser and that helped some.... But i just got a 12V wall plug in screwed a hole in the back and ran diffrent wires to it.

Dual DWM-3900... | Answered on Jun 17, 2009

In DVD mode, Progressive Scan shows on screen. Just press the stop button on the front panel for about 5 - 10 seconds and it will go back to standard mode.
I did the same thing tonight and I just tried pressing buttons


Dual DWM-3900... | Answered on May 30, 2009

have u solved the problem or still needs help, post me

Dual DWM-3900... | Answered on Feb 22, 2009

It seems like u have a dirty optical pickup ( which means the laser head ) which is used to read data from the cd. Most of the time it's dirt and if u did not cleaned it with a lens cleaner weekly, u a re going to take it apart once u get "no disc" error.
If u are upto it I can guide u, but i doubt it. Most of the time the laser unit can be accessed easily by taking the cover and cleaned with just a cotton bud with a light touch on the focus lens.
Still u need to be familier with it, if are going to take it apart.
And yes all it might need is cleaning, and the service guy cud overcharge u by saying he replaced the optical unit....so and so.. hehe
If u have a camera take a pic and sent it to me or we can chat, if u are like to do it urself

Dual DWM-3900... | Answered on Nov 08, 2008

I had tha same problem the fan in the back of the unit is blown I went to a local computer store and bought another fan a little bit bigger and i don't have the overheating problem any more.

Dual DWM-3900... | Answered on Sep 13, 2008

Because you have limited knowledge of your products history, first ensure that your Country Code is set correctly. Using your remote, access your User Menu/Setup > Country Code > U S > Memory > Setup. I am assuming that you are in the US, and are trying to view Region 1 DVD's. Please update for further instructions if the above doesn't solve your problem....good luck.

Dual DWM-3900... | Answered on Aug 16, 2008

Record players have a phono output that is much lower level than other audio equipment. If your receiver has a phono input that will have a preamp to adjust the level. Or your turntable may have a switch between phone o or line level and that would increase the volume as well. Most audio signals are line level but phonos are a magnetic signal that is much weaker and needs to be Amplified by a preamp in your receiver or in the unit itself.

Dual Audio... | Answered on Dec 18, 2018

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