Question about JVC AV-56WP74 56" Rear Projection HDTV-Ready Television

1 Answer

Jvc tv model av-56wp74

When I tried to turn my set on the speakers would pop in rythem and then stop,at this point the blue power light on the front would start to blink and no picture or sound.
I read your solution that it might be the power transformer,if this is so is it the board that the power cable is conected to Part #ssb-9068a?
please write me back at lovelle40@hotmail.com
thanks
mac

Posted by on

  • nancyiram May 23, 2008

    tv went black while making a popping noise then i unplugged the tv because it would not turn off with button when turned back on there was no noise but the button was blinking a blue light and would not turn off without unplugging it

×

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

  • Expert
  • 132 Answers

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


Posted on Jul 07, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

OK so my jvc av56wp74 will turn on with a green pic then turns off and the blue light in front blinks


it sounds like u need a new lamp with housing if that dont work than its your main board on the inside of tv. but i would try the lamp first

Aug 26, 2013 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Why is the blue light on front blinking


My answer is based on the model number here-AV-56WP74 or similar--blue light blinking is shutdown to protect the power supply in the set.

A few questions you could answer:

before this happened was screen red (too much) or had colors skewed or a little 3d looking?

The most common issue on this set if that is convergence and it can easily escalate to where it shuts the set down and blue blinks constant.

There is a simple way to confirm or deny that issue--Got someone willing to try that? Set will be unplugged and entire front grill under screen removed to try it(I can tell you how and what to do)

If no skill at all--consult a shop--if want I will answer questions or comments you post on this page--(add a comment button)

SD TECH-

Apr 02, 2012 | JVC AV-56WP74 56" Rear Projection...

1 Answer

BOUGHT JVC AV-56WP74 IN JUNE 2004. 52


It is worth getting an estimate. From the symptom you explained, it looks like the horizontal output transistor became defective.

Jan 16, 2010 | JVC AV-56WP74 56" Rear Projection...

2 Answers

I have a JVC AV-56Wp74 Blue power light on the front keeps blinking and the screen is black & makes a popping sound


There are a couple of common problems this model has--one is easy to confirm.


How handy are you if I tell you to disconnect the convergence board to see if it is your problem?

The blinking blue light means the set is in protective shutdown, and I know a fairly easy way to see if it is your problem and how to fix the set if it is.

Let me know if you need help--I am here to help people and l know a lot about this set.

SD TECHbd54bcc.jpg

Dec 16, 2009 | JVC AV-56WP74 56" Rear Projection...

1 Answer

TV is not responding


Your description does not tell me very much---You have a JVC AV-56WP74 and it does not work?

If the power light up front which is usually blue in color just blinks I can tell you a easy way to know exactly what is causing this problem.

If when you turn the set on the blue power light just blinks---that is short protection--most of the time a fairly cheap fix----LET ME KNOW WHAT YOU ACTUALLY HAVE GOING ON.

I am here to help---I do this here for free.

Do not hesitate to ask me for help or advice.

Regards, SD TECH

Oct 31, 2009 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Hello, I need some help diagnosing my TV, it will not turn on?


hi the problem you have is your convergence ic outputs part #stk 393-110 ther located on the front of tv chek for burning resistors on the same board

Sep 11, 2009 | JVC Televison & Video

1 Answer

Loud popping on jvc av56wp74


if the noise is from inside the tv in the back,the high voltage transformer that feeds the anode for the rgb tubes,28000volts probably is arcing.

May 23, 2009 | JVC AV-56WP74 56" Rear Projection...

1 Answer

52 inch rear projection tv turns off after a minute


try turning off the auto shut off feature in you set up screens . you can find them through the menu button on your remote. scroll through till you find it and turn it off.

Jan 18, 2009 | JVC AV-56WP74 56" Rear Projection...

1 Answer

TV Has no pitcher


you could have a shorted tube Green disconnect CRT board from green tube if set stays on tube is shorted also check video ic on crt board.

Dec 07, 2008 | JVC AV-56WP74 56" Rear Projection...

1 Answer

Our JVC 56in rear projection tv cut off and when we tried to turn it back on is makes a thumping sound and the blue light on the front blinks and the thumping sound gets louder... Help??


The problem is one of the video drive IC's on the crt boards is bad. These IC's are located behind the front speaker grille. The board connected to the bottom of the crt's will have these ic's on them. They will be screwed into a metal "heatsink" The part number is TDA6111Q

Nov 28, 2008 | JVC AV-56WP74 56" Rear Projection...

Not finding what you are looking for?
JVC AV-56WP74 56" Rear Projection HDTV-Ready Television Logo

375 people viewed this question

Ask a Question

Usually answered in minutes!

Top JVC Televison & Video Experts

The Knight
The Knight

Level 3 Expert

72640 Answers

Jaime Hernandez

Level 3 Expert

2296 Answers

easy alberta
easy alberta

Level 2 Expert

132 Answers

Are you a JVC Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...