Question about Samsung TXE2045 20" TV

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Can't tune low channels on Mitsubishi CK-2688R, 1985

TV must warm up before tuning channels 2-6. Only snow + loud static on channels 7-22. Do I need to replace the tuner?

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Hi and welcome to FixYa,

Offhand, not yet but could be after test/diagnosis. Initially, you must first determine for the presence/absence of the variable 33VDC tuning voltage. This voltage varies depending on what channel is tuned into thereby setting the VCO (voltage controlled oscillator). In some instances, it could be a faulty/leaked capacitor in the 33V supply or even a zener diode. Faulty capacitors are easily identified by bulging top (normally flat), blistered/split casing, brownish paper within the immediate surrounding, rubber bottom partially out and/or powdery residue on one of the pins. The diode is tested like any semiconductor, forward and reverse bias.

Good luck and thank you for using FixYa.

Posted on Feb 11, 2009

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1 Answer

When I turn the tv on (vega fd trinitron) the scren is all snow. There is no signal.


Hello
Have you tested it with auto tuning progremme process. If it snow there, your TV may be working properly. Sometimes its signal input path is not Ok. Without any signal, all TVs may show either snow, or a plane blue raster if its blue back function is on. You just do the automatic tuning process once again after connecting it with an external or internal antenna. There is a socket provided there in the back side of your TV, and marked as VHF/UHF. Connect the signal source to it first.
And set your TV to autotune by slecting it from the menu of your TV. The TV will search for all the channels available at that time, and after searching is completed, it will stop and show the first channel received. Afterwards you can chage or delete or skip unwanted channels. You may have its manual with you. All the descriptions are there in that manual. Ok.

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When using cable input video is good but sound has fuzzy static


Your TVs tuner tuned a little off frequency. It could be as simple as having cable box on where you have good picture but fuzzy sound, use the TVs remote to change the channel and then change it back to proper channel. If that doesn't fix you may have wrong tuning type selected in channel set up menu.

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1 Answer

Loud static


The set isn't fully tuned into the channel the satellite receiver is outputting on (should be channel 3 or 4). If this set is old enough it may have a fine tuning adjustment that needs to be tweaked a little to clear up the problem. Some Zenith TV's also had a switch to select different tuning systems. If set incorrectly this might happen. If yours has such a switch, make sure it's set to "normal" or "air". It may also be that just due to age the turner isn't working properly.

It might be time to consider replacing that set. A new one would give you all the picture and sound quality your satellite can give you. Right now you're paying for quality you can't appreciate.

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1 Answer

How do i tune tv channels?


I am afraid thatyou need the original remote to access tuning universal remotes will not give you this option. An original remote will probably be very expensive check with your local TV dealer.
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1 Answer

I just subscribed to HD service, But my mitsubishi 55807 tv wont display 1080 it stays on 480. the server is comcast. can you help?


IYou have to have your comcast box tuned to a channel that is broadcast in HD. On your Comcast remote hit menu. This will bring up several icons, one is HD. Select that icon and it will bring up the TV Guide for just HD channels. Select one and tune to that channel. Once your on that channel use your original remote and hit menu, then advance features, then go down to video display and change it from 480 to 980 or 1080. Let me know if this helps.

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1 Answer

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1 Answer

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It sounds like a defective tuner or a IF module as well. It may also be a defective capacitor(s) or cold solder joints inside the tuner circuitry. I woud suggest to use a VCR or a TV convertor connected to an Audio/video input to change channels instead of fixing it.
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3 Answers

Tv seems ok by static and now, no sound (or very faint)


The problem you're describing sounds like a tuner problem. BUT you say that you have the same problem with A-V input too. That's weird!!! Possibly the electronic TV-AV switching circuit is messed up and stuck in the TV (tuner) position. If this is the case you DO have a tuner problem and a switching problem too.

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1 Answer

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IF your TV is not one of the real old ones, you have a problem with the automatic tuning system. Some component in this circuit most likely a capacitor or coil is changing its electrical properties due to temperature which in turn causes the set to be off frequency until it warms up. A capacitor (condenser) can do this quite often. Stargazer

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