Question about Mitsubishi VS-50705 50" Rear Projection Television

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No sound on 3 channels

Hello,
Our tv recently lost the sound on 3 cable channels.......all other tv's in the house have sound. We checked the connections and all are fine. There is no cable box, just cable directly into the tv. Is the tv dying? It is 9 years old........Thanks.

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  • 29 Answers

Check if the sound adjustment is in STEREO-SAP-MONO mode

Change to STEREO mode

Posted on Jun 14, 2008

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I have a sony projection tv and the picture and sound are there, the cable feed is good, but the picture has a lot of static. Almost like a weak connection.


Check the input channel is 3 or 4 if you are using an external receiver, satellite or cable. If it is set on 4 and the input receiver is 3 then you will have adjacent channel "bleedover". make sure the two units are set on the same channel.

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Get closed captions on some channels, but not all, even though it is CC


RCA have choices for different methods of CC in user CC menu. Labelled T1, T2, etc. . Different selections are for different types of close caption. Tune to a signal (on your other TV) that has closed caption working.

Tune your RCA to the same signal. Change the T1,T2, etc settings until the closed caption for your signal appears.

If this doesn't work, try connecting analog video or VHF channel 3 (or other specified channel) to the TV. check CC. When TV stations, sat channels, sat receivers, cable boxes etc, convert analog video signals to HD, problems can result. Some equipment causes RCA TVs to do unexpected things with sound and closed caption.

If you use RF or video output, old analog video may look better on CH3 or video than on HD input and the CC will work more consistently. Watch HD signals on HD input, Analog signals on Video in or through the TV tuner . Many HD channels and programs are converted analog video and look poor on TV HD inputs.


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1 Answer

I have lost the normal tv channels on all 3 of my TV's (bbc 1 bbc 2 itv channel 4 through the aerial) but freeview channel are still working on AV. any ideas?


If you have all 3 tv's in the one house and on the one antenna then it sounds like you have been subject to either a lightning strike or a large static discharge onto your antenna. What this means is that the tuner packs in the back of the tv's has been damaged and will need to be replaced. However as you have said in your question they do work using an av input. This will be your cheapest option to get them working again. Buy cheap vcr's for them and connect via av cables, as the tuner modules are expensive to buy and even more so to have fitted.

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2 Answers

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alot of sets turn solid blue when the signal is lost . check your antenna or cable inputs might be chewed up by pets mostly.
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MITSUBISHI vs-7083


What is your source? Antenna, cable, or satellite?
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Problem with PIP Function


To turn off PIP. Use tv menu and auto set channels, once searching for channels, turn off and PIP will be gone. If you can't access auto program tune tv to channel 3 and try again.

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1 Answer

Picture


Ther is a test you could do is you had the proper equipment, and that would be to inject a know good RF signal into the tunner F connector and chech tha point where the RF/IF is converted to audio and video, to determine if the proble is a bad tuner or not. The equipment is a VA62A Universal Video Analyzer. Its a great piece of equipment for this type of work. another thing you can do is get an RF Modulator from Radio shack and input a video and audio signal in to it and set it to channel 3 and connect the F connector to the TVs F connector. The set the TV to channel 3 you should see the picture and hear sound in channel 3. The VA62A is best because you can set it to emulate all of your channels from 1-87 standard TV and Cable TV. In any event a test needs to be run to see if the tunner is at fault.

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