Karaoke Forums

Hi! I have been doing karaoke shows for a while now ( 3 years) now and suddenly I am having trouble with my t.v. screens! They have huge squares going through the picture or it gets really static ( I have tried a new splitter, new coax cable from the rf modulator box (that has channel 3 and 4) and i have changed the coax cables on the t.v. and tried switching from channel 3 to channel 4 but it does not make any clearer! The picture sometimes will get better when I move the splitter around or hold onto it! I am at my wits end (the only thing I have not tried is new 13 inch and 19 inch t.v.'s but I find it unusual that both t.v's would go bad at the same time! I only use one JVC triple tray player with a Peavey 00443460 XR® 684F 2X200 Watt Mixer with Feedback Ferret® ! I would gladly take ANy advice since this particular troubleshooting problem is new to me! Someone had already mentioned that it might be a bad connection in the player itself but I do not have another player to test this theory (although I am going to invest in a second player soon) Thanks for any suggestions! Just a confused Karaoke g

sounds as if your modulator itself may be bad! OR have you replaced the splitter itself?

Think about the common occurance!

Some troubleshooting tips:

* hook up another tv while the one is acting up, so you'll need to do this before the show. Unhook the one, and attach it to a new tv.  If there's no change, this confirms the signal TO the tv is bad...

* disconnect the splitter and see if the tv handles a straight signal without any problem.

When all else fails, go simple, and see if the problem exists. Then go more complicated on your hookups until you eliminate the problem child.

Huge squares could be the player as well or bad discs - explain a little more what "huge squares" are, to my it sounds like graphic garble in the player - often times it will still sound fine (Or you'll get skips, but you didn't mention that).  How often do you get your player cleaned & aligned?  Might be time!!!!



<edit> ah I saw you mentioned someone thought player as well.

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well it's like one big square floats through the t.v. starting at the top and then makes it 's way down to the bottom and back around to the top again (sometimes there will be two of them at a time going through it! I have actually not had my player cleaned or aligned since I purchased 3 years ago (pretty bad huh?) maybe that could be it! However, yes it still sounds fine and the words all come up fine on the screen it just seems like the screens themselves, however it would be wise to get it cleaned! I might also try a new RF modulator box ( I usually just go to  radio shack to get this ) is that quality enough? It seems like i have purchased these quite frequently (every 6 months or so) Normal? Thanks for reply!

that sounds like the screen saver part of the player... bleeding through.

What can I do for this if anything?

HUH???

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If its a bar all the way across then its the balanking bar put your player back to NTSC its prob on pal....

LOL... what I mean is, it sounds like the screen saver that moves from corner to corner. For instance, the JVC has a dog with a microphone that moves from corner to corner. The pioneer laser player had a similar feature... a parrot with a microphone.

What I'm guessing is the JVC he has is dying a slow death... because both features are working at the same time.

But I do agree that maybe the switch for PAL/NTSC may be partially turned to the other...

Lawrence, do you have another player?

Screensaver, gotcha!  

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Thanks Lonnie! Didn't see that!

even a regular dvd player will work. VHS... anything that you're going to send the signal out to the tvs...

as far as the rf modulators being replaced like that, no it doesn't sound normal. I've had some in use for many, MANY years. In fact, when I went to get a new one, I was freaked out a bit by the fact that they're a bit different than they used to be!

Another thing to remember is the switch on the RF Modulator... the default position is sometimes set to the European frequency, rather than the one we use.

Yellow colors will appear white. The way to test this is with a music maestro disc! ! When it highlights, you'll barely see it on the WRONG setting... on the correct, you see the white words with bright yellow highlighting!

And regular dvd signals... it'll appear much too bright, and a lot of details will be lost, such as a movie playing... flip the switch while it's playing, and you'll see what I mean!

I will try all the suggestions! thanks and i 'll letyou know!

this would be my guess as well

Hi it's the newbie again! Just thought would mention that I do think that I am getting some sort of interference with the bar i am playing at . I set up my whole system at home and connected my t.v. and had an absolutely clear picture (i also had replaced the coax cable) So I thought Great- I fixed the problem- Only to find that when i got to the bar that night once again I had a bad screen on my t.v. but their in-house t.v. I hooked up to had a perfect picture. I also did check the back of player and it was set on the NSCT not the PAL so I don't know is there anythin I can do if it is the bar cuasing the interference? Thanks for any imput!

Transformer less tvs (all of them now ) can cause hum in the system on the co-ax ground... I would suggest getting an outlet testor . It is a grounded plug with three lights on it and use it for checking the outlets you are using there (it checks if the outlets are grounded right too).. The tv has a polarized plug that only should be plugged in one way .. You might try reversing it or see if the wide prong is going into the wide slot in the outlet...At your modulator unhook the big screen see if you still have hum on your stage monitor....
 A 60 cycle hum bar is a horizontal black bar that drifts up thru the screen all the wayacross which indicates a bad filter in a power supply.. Rf interference is random audio and video on the screen..  A bad ground connection on a co-ax can cause or be susceptible to interference like compressors (cooler) in bars...

Are you feeding it through RF (eg the aerial connection) or from a composite (yellow RCA phono) connection?  If it's RF then changing to composite may help if you suspect a local source of interference.

I don't know much about how broadcasting works in the US, but if it's anything like here in the UK and your venue is some distance from where you tested, check that the RF output channel you're using isn't used locally to the venue for broadcasting, otherwise you could be getting interference from a weak (due to there being no proper aerial) tv broadcast.  Again abandoning RF and going for the composite ("AV in") approach ought to cure that one too.