Question about JVC AV-48WP30 48" Rear Projection Television

4 Answers

JVC 48WP30 will not power up anymore

I was doing a convergence alignment in the service section of this tv when I pushed an incorrect button on the remote, the tv made a small pop noise and then went blank. Now it will not turn on and when it is plugged back in the blue power light comes on automatically and there is a soft clicking sound that comes from inside (sounds like a relay clicking) but I can not tell where it is coming from. I am not sure what to look for now.
Please help!

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  • kinmon Feb 24, 2008

    I have the same problem. when I plug and turn tv on, I am getting a clicking sound. please notify me with solution.



4 Answers

CLicking relay means it is going to start up current and then reaches the over current protection or over voltage protection circuit's preset limits and goes into cut off. The most common cause is a failed horizontal output transistor (HOT). On this model the HOT rarely fails by itself but is overloaded by the failure of one of the scan derived voltages. Continued powering up of the TV could damage the SMPS. You can easily ohm out the HOT after you unsolder it. If it is bad you will have a big chore trying to find the load. The focus block has a history of failure as does the voltage divider for the 3 CRTs. Either way you will need another HOT that may fail again before you find the load. The lead for the High voltage transformer unplugs by twisting the connector as does the 3 leads on the divider. If you had previous problems with the convergence circuit it is a good bet the problem is there. There is also an issue of HV bleeding off of the annode leads going to the CRTs, The snap you heard could have been the arc jumping. HV sealant put on over the sealant already there fixes the problem. Without having known good boards you will have serious difficulty fixing this TV. I could spend hours going thru steps of things to check, but without the schematics you are dead in the water. We stopped making the CRTs for this TV so spending a lot of time T/Sing this TV and then finding out it is one of the CRTs that is loading down the HV will be a big bummer, since the only ones around are ones in somebodys stock room.

Posted on Apr 23, 2008

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Posted on Dec 25, 2007

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If you replace the convergence IC's and the issue continue.

Check in the deflection area the horizontzl transistor could be bad or short.
good luck.

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Posted on Dec 24, 2007

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Replace convergence IC's and check low value resistors. Always use ORIGINAL NOT GENERIC OR KNOCKOFF PARTS. Board is accessable front front

Posted on Dec 23, 2007

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Apr 10, 2008 | JVC AV-48WP30 48" Rear Projection...

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Jvc av-48wp30 convergence problem

1. if the 1.5 ohm resistor was open, then you may have fried your new convergence ic's. Sorry
2. bettween a 1.5 - 1.9 ohm resistor will work
3. press sleep button, set to 30
hold down video status button and press display on remote
select convergence from the new menu and hit OK.
Do fix the convergence before you try to align the convergence or it will look horrible after you get the circuit fixed and will be harder to align.

The white button is there because the DCU (digital convergence unit) can be erased by holding that button and turning the set on.

Hope this Helps.

Mar 16, 2008 | JVC AV-48WP30 48" Rear Projection...

2 Answers

JVC convergencehas to be adjusted everytime the TV is turned on

You will need to enter servicer mode to do the alignment then
save is in service manual........
Does your set have an auto-focus selection ? Try that first...T.

Dec 26, 2007 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Blue power light constantly on...

possibly shorted crt drive ic on crt board.

Jun 14, 2007 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Convergence problem?

Not unless the Tv sneaking some kegerator juice while your not there??LOL It sounds like a Main b+ filter or possibly the convergence IC and is not user serviceable. With all the hi-voltage inside these sets its best for you and the set to call in a proffesional to do this type of repair. Sorry i couldnt assist you more with this repair.

Jun 12, 2006 | JVC AV-48WP30 48" Rear Projection...

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