Question about Optimus 31-3045 Receiver

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Powering Off I was watching a movie and had the sound load and the sound stopped and the unit display said Powering Off. I checked both fuses and they were good. Every time I turn it on it will go to Powering off. Ilooked at the caps and diods and didn't see anything burned.

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Re: Powering Off

There is a problem in the audio output circuit. Most likely the output IC(S) went bad. This is a solid state unit and there are no user replaceable parts inside them, Please take this unit into a pro to be diagnoised. Good Luck

Posted on Apr 08, 2007

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Unit powers on but no display and no sound

It sounds like power supply problems which by design supply a multitude of what's called "secondary" voltages which are often different values...18volts, 24 volts, etc. A fuse blown on the primary side (or unit unplugged from wall outlet) kills ALL voltages where-as secondary voltages route through different circuits where some are obviously intact (unit still powering on) but other voltages have failed. It's repair shop time Robert.

Mar 31, 2015 | Audio & Video Receivers

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that sounds strange. your receiver is not that smart to work out the differences between movie and music dvd. more info would be good.

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I have a Jensen DVD media pro 5000 hooked up to a ViewSonic TV in my Camper Trailer. Camper Trailer was purchased with DVD Player and TV in it. At night, due to child sleeping, I would like to be able to...

hi yes you can do this press AUD button near the on/off/volume control momentarily to step through the following audio adjustment options volume, bass,treble, balance (left to right) and fader (front to back). when the desired option appears in the display, rotate the volume control knob to adjust that audio feature. When no adjustments have been made for three seconds, the unit will resume normal operation. so you can fade the speakers to however you want them...hope this helps

Aug 03, 2010 | Audio & Video Receivers

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DTS option shows on the display when playing a DTS movie, but unit will only play in Dolby when trying to select listen mode...I can't select DTS mode

That is a typical function of the movie you are watching..changing the sound mode can "usually" only be done by selecting it on the disc, or by using the audio button on your player depending on the model.

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1 Answer

Pioneer SX-2300 powers up, but no sound.

Does the output relay click about 5 sec. after powering on? If it does check if the tape2/tape monitor is on. Check speakers and wiring. Try headphones.

There aren't any fuses for the output.

If no relay then it probably needs output transistors and a few resistors.

Dec 17, 2009 | Audio & Video Receivers

1 Answer

No sound: The receiver has suddenly stopped giving out any sound, regardless on which input I use. Have tried powering off/on (disconnecting all power), and checked front-speakers on another receiver.

That sounds like you blew the fuses inside the receiver. Take the cover off and check them. Typically thats the problem and if I'm not mistaken they are AGC-5 Buss fuses available at your local hardware store.

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1 Answer

No power

The Sherwood R-945 has at least 6 fuses inside - any one of them could keep the system from powering on properly. The lowest power fuse is rated at only 35 MILIamps, I believe ( it's element is barely visible to the naked eye ). Check that all fuses are intact (with the power off)

My R-945 unit kept shutting itself off directly after powering up - turned out that one of the speaker wires had a fault - (found after hours searching with voltmeter). Check that all Inputs / Outputs are secure.

Good luck with yours!

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If DIGITAL sign blink, this mean DSP board is defective. It will cut the sound on the AMP section. DSp is maybe defective.

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Shutting off during a loud part of a movie

Its eather a defect with the reciver top end shut down /over bias system , Or the speakers could be partially shorted, such as instead of being 8 ohms, the speakers could have a few shorted windings from a loud music event?? I would take the speakers in to be checked under load. NOT just checked for resistance.. A regular shop may not know how to do this BUT tell them you need to put the speakers under a load and then measure the resistance . GOOD LUCK

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Pioneer VSX-D498

Perhaps the unit isn't switched to 5.1 Maybe the movie wasn't recorded in 5.1 or if it was perhaps the recording was faulty. Try a known good recording to check the system. Check your outputs and inputs plus your speaker cables. Check the fuse if there's a seperate one for left and right, which there should be. Try swapping the front speakers to the rear and the rear to the front and see if the fault is still with the rear sound. BMW

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