Question about JVC AV-48P575 48" Rear Projection HDTV-Ready Television

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Need a av-48p575 that has good power supply board and conv output

The rest can be damaged or broke just need help finging junk tvs to get parts from any help would be great thanks for all the help

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Try Shop Jimmy.Com

Posted on Feb 14, 2009

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JVC Model No. AV-48P575. Picture goes all distorted after it's been on awhile, then a bit later it goes back then distorted again. Can someone please help


Ur tv are developing a problems call convergence,it dying.The convergence board the 2 STK convergence ICS,and some or all it resistors are dying.These parts are must be changed to solved the convergence problems.The shop will cost u $300-350 for the parts and labors.

May 21, 2010 | JVC AV-48P575 48" Rear Projection...

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Clicking on the power supply board(no picture or sound)


If you hear a buzzing, humming or rapid clicking noises this could be a problem with your ballast.Might be a good idea though to pull out your lamp just ensure its not damaged.You can find these at discount-merchant.com

Apr 01, 2010 | JVC AV-48P575 48" Rear Projection...

1 Answer

Jvc av-48wp74 i have sound but no picture History I have a JVC AV-48wp74 Projection tv when i got this tv the stk ic's were overheating and the picture would come and go typical of overheating . I put a...


Number 1- don't spin your wheels on the replacement board repair the old, it can't be unrepairable. As for the over heating of the conv ic's not normal. Since you changed the conv bd and they still over heat, if I had the set I would do a reset of the registers in the service convergence mode then re-center the grn then red then blue and that will be with the centering magnets and yoke on the crt's, If you don't have a template for that then you will have to make good old fashion geometry measurement's, the green is first, every line straight vert, horz, and spaced, with of coarse the cross in the middle will be dead ctr. The overheating problem can be because the register settings are advanced to far do to corrections thru out the years with comp's changing in value and us compensating with adjusting the convergence.

Feb 27, 2009 | JVC AV-48WP74 48" Rear Projection...

1 Answer

I am lookin for parts for jvc av-48p575 power supply panel and


hello have you tryed ebay also here is website you could try mulja repair portal-index you can buy spare
parts try and find out the part number of the panel you need . you could give this company a call it's called wiltsgrove in birmingham 01217722733 good luck

shaun

Jan 24, 2009 | JVC AV-48P575 48" Rear Projection...

1 Answer

Jvc tv model av-56wp74


1024x768 Normal 0 Won’t start

The power supply has an automatic shutdown circuit that senses a shorted component and excessive current flow.

If you can access the convergence board and remove the plugs one at a time (red, blue or green) for the convergence output, the TV may start up and show a picture with the unplugged color misaligned.

This confirms a short in the convergence output. The convergence IC failure can show up as coloured outlines or power supply shutdown.

If this does not help, then there is some other short circuit in power or deflection circuits. You need a technician to troubleshoot HV or power problems.

Replacing the output amplifiers (located within the Convergence IC's) allows the pictures to line up correctly, and no more color outlines or power shutdown.

This is the most common fault in all makes of rear projection TVs.

Some models of TV require major disassembly and considerable shop/manufacturer's support to repair because of their design that causes other power supply or vertical deflection problems. The poorly designed products require a "bench" repair that can typically cost from $350 t0 $700.

Some TVs are designed for on-site repair and have more reliable circuit design that does not usually cause damage to other parts of the TV when convergence chips fail. The ones that usually allow reliable on-site repair are JVC, Samsung and Hitachi.

It is normal to have some resistors in the circuit burn up or increase in value from the heat (from 2.2 ohms to 5 or 10 ohms). These resistors must be replaced with the right value or the chip may fail again.

This is not a simple repair like changing batteries or a fuse. Reading through the other posts shows many that try and end up with bigger problems.

Your JVC uses STK 392-110 IC's. Misinformed people replace the IC's with other "new and improved" IC's, like STK 392-150. These are devices with different characteristics and require different value resistors in the circuit. Replacing with the STK 392-150 will cause overheating of the resistors and a damaged IC.

If you are in Calgary, I can help. If not, get someone that has experience working on your JVC. My website is below with some costs and explanation.

calgaryconvergencerepair.weebly.com/convergence-explanation.html

Good Luck,

Easyab


May 08, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Power problem


Dear tonyb73,
Try to check the relay in your power supply, it might have a loose solder or loose connection at the back of PC board. The sound that you hear when you plug is the relay itself. if your set newer , check for loose connections on pins and other connecting parts of relay. That is located in the power supply section. If nothing happened after resoldering, then replace the relay, probably the contact points is corroded or damaged.Hope this will help...pls. send feedback so we can work together.. Thank you....
Good Luck..

rgrds,
Eriez

Apr 27, 2008 | JVC AV-48P575 48" Rear Projection...

1 Answer

Need help to locate two parts.


the parts are the convergence power supply and convegence amplifier board. two circit boards that are over the main cuircit board. I dont find there too difficult to replace. i believe union electronics carries those. always be carefull in a television. there are voltages that will hurt you.

Nov 11, 2007 | RCA D52W19 52" Rear Projection Television

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