Question about JVC AV-48WP74 48" Rear Projection HDTV-Ready Television

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Are you talking about the connections on the back of the set? And how are you measuring this? AC or DC?

Posted on Feb 19, 2008

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How do you check ballistic voltage

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Feb 09, 2016 | Mitsubishi Projection Televisions

1 Answer

What is needed to converge a 65 inch JVC and an approximate cost?

U have all the tools,also u can do basic soldering work like take out ICS and putting back in ICS chips on a electronic circuit board and take out small electronic components parts and replaces all those small dead components parts resoldering it back on to a circuit board?Yes?Tries websites like, to buy a whole complete convergence kit will also included a DVD tutoring disc belonging to ur DLP tv make and model u are buying will cost u like $70.U do the labors to fix it ur self.Or the tvs shops will cost u like $300-350 for parts and labors.

Aug 28, 2011 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Rca scenium projection tv turns on lights blinks 5 times no sound or picture and make a siren noise

this is likely due to a leaky high voltage circuit an open or leaky device will allow the 30 or more thousand volts to spark to ground or another component, if you have the back off turn the lights off for total darkness have a partner turn the tv on wile you observe in the back, if there is a spark you will see a deep blue flame or ark and a squealing sound will be heard.. If so i suggest you read on....

Hello, i will list the criteria required to service TV and projector TV`s first and foremost you require a good understanding of how TV`s work and the ability of reading schematic diagrams, then you require a knowledge of how printed circuit boards are patterned so you can navigate around them to locate possible trouble spots.
then you require
1 multie meter of good quality
1 oscilloscope 20 MHz or better
1 shop service manual pertinent to your type and model of unit you wish to repair
this is a minimum requirement of test equipment you can have

you also kneed a location or locations to obtain the replacement parts you may require to complete the service task.
Now if you have all the above criteria in place then you have some hope to service your unit

a flashing red indicator on your TV usually refers to an internal circuit failure, most modern TV`s have circuits incorporated in the circuit design to protect good working components not involved in the fault from further damage so the set will not power up and an indicator light will start flashing, trouble spots can be anything like power supply under voltage, over voltage over current, no vertical deflection, excessive high voltage, XRAY, convergence failure,, EXT EXT,EXT,
Warning rear projection televisions can harbor in excess of 30,000 ,yes that is thousand Volts

There are and never will be user serviceable components inside LOL

Now if you are ready and require further assistance you may contact me and i will step you through the diagnostic procedures Good luck

Feb 27, 2011 | Projection Televisions

2 Answers

My wife said that the tv made a buzz sound then the screen went blank. The tv still turns on, but the screen remains black. I tried leaving it off for awhile, but the problem is the same. Is there a...

This tv have a circuits section call the Deflection board and it is dead,it could be burn any parts of the electronic components on this area.The buzzing sound u hear is the FBT-The high voltage Flyback Transformer have it high voltage current have no where to go,the FBT it could be dead also.This tv can't be done any quick fixes.Must hire a Tv Tech. have to troubleshoot and find out which eclectronic components are dead and require replacing on the tv Deflection sections circuitries of the board.

Dec 04, 2010 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Hitachi rear projrction tv. All of the rear connection are showing a output of 42 volts? Is the normal how can this be corrected?

Get a AC voltmeter and check between a known ground (outlet or water pipe)

If you read AC voltage on connectors one of two things is wrong:

1, disconnect cable or sat going to box and see if voltage still there.

2. If no voltage then, polarized plug has been defeated someplace in your home--what happens if large pin on any power cord with cable etc connected to the sets is the set is putting 120 volts via the cable connection to ALL SETS CONNECTED IN THE SYSTEM.


Polarized power cords were developed 40 plus years ago and the large side of the plug goes to the neutral side of the outlet--you are either getting it from the outlet or it is being fed back via the coax from another set.


IF THIS has told you something you did not know rate this solution as very helpful as I do this here for free.

If you have more questions LET ME KNOW--I AM HERE TO HELP.


Aug 18, 2010 | Hitachi 61SWX10B 61" Rear Projection...

2 Answers

How do I check voltage on the flyback?

If you Don't know...

Then you should NOT even attempt to measure it!!!


Oct 10, 2009 | JVC AV-65WP74 Rear Projection Television

1 Answer

JVC Model av 48p777 I adjust contrast knobs inside tv and now its still blinking and it shuts off like it gets too hot


Firstly, check for a blown fuse or circuit breaker or a power outage. There is a fuse on the inside back panel that is suspect which is located near the power entry to the back of TV. Some versions were socketed others soldered. If you have already tried hard reset (unplugging and plugging it back after 5-24hrs) and still the issue is not resolved then this is more likely a power supply failure. Most causes of TV failure are due to bad capacitors on either a system board or the power supply. In this case, it sounds like the power supply. You can test the capacitors with a capacitor tester to determine faulty capacitor. You can also test other components like power supply current with voltmeter or multi-tester. It can also be due to the protection circuit that is detecting excessive power or current drain by one of the sections of the TV. Could be the high voltage; could be the deflection circuits; could be the audio amplifier; could be the main power supply itself. All this is only recommended if you have electrical expertise and know how to solder/re-solder the components.

Please do accept the solution if the issue is resolved or else revert for further assistance.


Sep 27, 2009 | JVC Projection Televisions

1 Answer

Vertical jitters on picture - JVC AV48P776

What you are experiancing is loss of High voltage. The line is called a retrace line. It is usally caused by failure of the flyback circuit or aging of the TV tube. This is the single most common failure with CRT based display systems. The high voltage can be tweaked up, to accomidate for the age of the tube. Its a short term solution. Because of the high voltage nature of this circuit, suggest a professional repair.

Jun 29, 2009 | JVC AV48P777 Television

1 Answer

Jvc av-56wp74 power up failure

Hello hwkdoc,


What has happened is that your shutdown circuit relay has tripped and it looks like it also may have malfunctioned. This however is not the cause of your problem but a symptom. The cause of your problem is an over-current condition caused by one of the systems in your TV, I would suspect the high voltage power supply or the switching low voltage power supply. These are the first places to look, if they are not the problem then check the convergence correction amplifiers. Right now the shutdown circuit is keeping the TV from coming on. If you do not have a background in electronics I would advise you to have a qualified TV technician analyze and repair your TV.


Thank you,



Oct 15, 2007 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Adjusting visuals on the TV does nothing

This problem may have been coming from the Flyback Transfromer or the Tippler, you have to be a technician to adjust that! if you are, well first thing is to put the TV ON and sent up all the level to max for the brightness & Contrast, then after try to adjust the Flyback screen voltage for hi bright, if it work there, try back now to see if you are getting any control of the menu of brightness & contrast to work! please be careful, there about 28K volts to 35K volts, this can kill anyone... IF YOU ARE NOT A TECHNICIAN PLEASE DO NOT OPEN THIS TV.... RandyXi CriticaL PaniX

Jun 29, 2007 | Sharp 55R-WP4H 55" Rear Projection...

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