Question about NEC VT47 Multimedia Projector

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Audio Jack of NEC VT47 (using external speakers)

There is an audio jack in the back of the NEC VT47 but when I plug in working speakers, nothing happens. The audio still is projected from the NEC internal speakers. I know the speakers work on several other machines with no problem. The speakers are plugged in and working. The issue seems to be with the jack itself. Is there a way to replace or fix this? The internal speakers on the projector are not loud enough for my classroom.

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Go to your menu find the volume settings. i think your volume is 0 or muted.

Posted on Oct 08, 2009

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The Windows control panel is where you should look, under sound. You can then select the output. If you are plugged into the audio output jack it will not recognise any particular speakers, so does not need a driver.

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You have a 3.5mm Audio Input jack for external audio in. ( Not Speakers) The Audio Output jack is for connecting that to a stereo system which is the best way to go. So, what you want to do is connect your xbox audio out which is probably a rca jack to the projector. I believe you will have to buy a y-adapter ( 3.5mm male > double rca fe-male) then use the standard rca audio cables. You don't plug speakers into that unit, I hope you haven't damaged the audio circuit. You might have a external audio switch within the menu of the projector to switch from internal to external audio source,,, look for that.

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    Connecting Full-Size Speakers
  1. Step 1 Insert the red and white plugs on a set of RCA audio cables into the right and left audio "OUT" jacks on the back of the TV.
  2. Step 2 Connect the other ends of the cables to a free pair of audio "IN" jacks on the amplifier.
  3. Step 3 Strip 1/2 inch of insulation from the speaker wires, and connect a pair of wires to the left and right terminals on the back of each speaker using the red wire for the right audio connection and the other wire for the left.
  4. Step 4 Connect the other ends of the speaker wires to a pair of stereo speaker terminals on the back of the amplifier. The wires attach by raising spring-loaded clips on the back of the amp to reveal a hole for inserting each wire.
  5. Step 5 Set the amplifier selector to the set of audio jacks connected to the TV to enjoy stereo sound from the television.
  6. Connecting Self-Powered Speakers
  7. Step 1 Insert the RCA plugs on the Y adapter into the TV's Audio "OUT" jacks.
  8. Step 2 Connect the mini-plug on the wire attached to the right-hand self-powered speaker to the mini-plug jack on the Y adapter.
  9. Step 3 Plug in the audio cable and mini-plug from the left-hand speaker into the Audio "OUT" jack on the back of the right-hand speaker.
  10. Step 4 Connect the AC adapter to the power jack on the back of the right-hand speaker, then plug the adapter into an electrical outlet.
  11. Step 5 Switch on the external speakers and adjust the volume.

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Hi, had same problem.... unscrew the remote and carefully remove the back end part of the stereo-connector (very careful !) it consists of a very small switch which moves sideways..... this switch is stuck into headphone-modus. Reassemble and it will work again
Note that speakers will work if you remove the switch

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