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

2 Answers

Jvc 48" tv model av-48wp34

My tv is about 3 yrs old. I was watching cable this morning and all of a sudden the picture went blank. The only sound that it makes is, like a beating noise, then after about a minute of so, the noise stops. But I dont have any picture or sound. Does anyone know what this might be? When I turn it on, it does the beating noise again, and then stops, but still nothing.

Posted by on

Ad

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Had the same problem...cost about $125.00 to fix..diode bad chasp

Posted on Jan 06, 2008

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,476 Answers

Sounds like you lost the High Voltage. The beating sound is the power supply trying to start up. After a predetermined time it will quit to protect the set. This is a very common problem and typically not that much to repair. If you are not an electronics repair technician you should find a reputable repair shop and enlist their services. I would not think the cost should exceed $150.00 to repair. Good luck.

Posted on Jun 19, 2007

Ad

4 Suggested Answers

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.
Good luck!

Posted on Jan 02, 2017

  • 12 Answers

SOURCE: JVC AV-48WP74

havent had time to check these things out but here is some raw research I have done

No. The CRT driver ICs are prone to shorting and cause this symptom (I just had one with those very symptoms and the green CRT driver IC was shorted). Disconnecting the CRT board does not clear the short on the board. Often then is a small burn mark on the CRT board under the affected IC (but not always). The IC should be a TDA6111Q. Be sure to note the proper position
of the IC as it should face with the letters TOWARD the heat sink!!!!

Larry, Check the CRT driver ICs on each of the CRT boards.
Bob Waterman, CET® #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxx
Hi Guys, I don`t see many JVC`s and don`t have the print for this AV48WP30, went out this morning and as customer claimed on phone when you plug set in and turn on it makes a loud thump thump in both speakers 20-30 times then relay clicks, the thump stops, and blue idiot light on front goes dim/bright, dim/bright, have to unplug set to start this same scenario over again. Never develops HV or audio, Will order the service manual today, but would like to know if anyone has seen this before (should say "heard" this before)
I would disconnect each crt board and hv lead one at a time and try. Have seen several bad tubes on that model. The only other problem I have seen on that set is bad convergence amps, however that doesn't cause shutdown.
Perry Bower
Electric Medic
From Tech Repair CD:
JVC\AV48WP74\just went click*click*click when turned on Video drive IC (IC1101) on the red CRT module
shorted. It looked like bad solder on the B+ was the cause

Frequently Used Top Five Repair Parts by symptom code
MODEL NUMBER : AV48WP30 - TV
SYMPTOM CODE : DEAD
TOP FIVE PARTS :
2SC5552-RL
2SC5904-RL
QQH0113-002
STR-F6629B/F7
STK392-110
Above from JVC Web site, also I have seen shorted video drive IC's on the crt boards short and cause this symptom. Try unplugging the 200 volt source to the crt boards and see it the set powers up and stays on. There is a B+ relay which supplies 130 Volts to the horizontal output circuit. Is this relay energizing? I takes about five seconds after the power is turned on for it to energize. If a short is detected on the 130 volt line the blue power lamp on the front will do what you describe and the relay will pulse on and off. (David)

Symptom:
Non-functional Digital Input
Solution:
1. Power off the unit
2. Disconnect the digital input if it is connected
3. Remove the rear cover
4. On the digital input module, using a shorting pin (PC type) or a
jumper, short Pin 1 and Pin 2 of the
SB connector
5. Power on the unit
6. Unplug the unit and remove the shorting pin or the jumper
7. Re-attach the unit’s rear cover
8. Power on the unit, and input the digital source

Posted on Dec 06, 2007

  • 12 Answers

SOURCE: JVC AV-48WP30 48 in. Rear Projection

this is the raw research for this that I have found. It seems like the most likely culprit for this is the stk chips on the convergence board (JVC didn't put nearly enough heat sink compound on should be a small layer all the way across they put on a couple dabs) I hear tale you can check this out by disconnecting the convergence board and turning on the set . only go after the convergence board from the front (behind the speaker grill is another panel, the convergence card is right behind there) there is a sneak circuit which will kick in possibly destroying at least the dvi input and mabie more if the set is powered on with the back removed and you didn't put a jumper in the right place or cover over a hole in the back of the dvi module (supposidly to keep people from hacking movies, like there arn't easier ways to do that if you really wanted to). if that doesnt fix it then I have found several other possibilities but I am now a few hundred miles from the tv that I was working on so havent had a chance to try this out:
No. The CRT driver ICs are prone to shorting and cause this symptom (I just had one with those very symptoms and the green CRT driver IC was shorted). Disconnecting the CRT board does not clear the short on the board. Often then is a small burn mark on the CRT board under the affected IC (but not always). The IC should be a TDA6111Q. Be sure to note the proper position
of the IC as it should face with the letters TOWARD the heat sink!!!!

Larry, Check the CRT driver ICs on each of the CRT boards.
Bob Waterman, CET® #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxx
Hi Guys, I don`t see many JVC`s and don`t have the print for this AV48WP30, went out this morning and as customer claimed on phone when you plug set in and turn on it makes a loud thump thump in both speakers 20-30 times then relay clicks, the thump stops, and blue idiot light on front goes dim/bright, dim/bright, have to unplug set to start this same scenario over again. Never develops HV or audio, Will order the service manual today, but would like to know if anyone has seen this before (should say "heard" this before)
I would disconnect each crt board and hv lead one at a time and try. Have seen several bad tubes on that model. The only other problem I have seen on that set is bad convergence amps, however that doesn't cause shutdown.
Perry Bower
Electric Medic
From Tech Repair CD:
JVC\AV48WP74\just went click*click*click when turned on Video drive IC (IC1101) on the red CRT module
shorted. It looked like bad solder on the B+ was the cause

Frequently Used Top Five Repair Parts by symptom code
MODEL NUMBER : AV48WP30 - TV
SYMPTOM CODE : DEAD
TOP FIVE PARTS :
2SC5552-RL
2SC5904-RL
QQH0113-002
STR-F6629B/F7
STK392-110
Above from JVC Web site, also I have seen shorted video drive IC's on the crt boards short and cause this symptom. Try unplugging the 200 volt source to the crt boards and see it the set powers up and stays on. There is a B+ relay which supplies 130 Volts to the horizontal output circuit. Is this relay energizing? I takes about five seconds after the power is turned on for it to energize. If a short is detected on the 130 volt line the blue power lamp on the front will do what you describe and the relay will pulse on and off. (David)

Symptom:
Non-functional Digital Input
Solution:
1. Power off the unit
2. Disconnect the digital input if it is connected
3. Remove the rear cover
4. On the digital input module, using a shorting pin (PC type) or a
jumper, short Pin 1 and Pin 2 of the
SB connector
5. Power on the unit
6. Unplug the unit and remove the shorting pin or the jumper
7. Re-attach the unit’s rear cover
8. Power on the unit, and input the digital source

Posted on Dec 06, 2007

  • 1 Answer

SOURCE: no sound on JVC AV-48P575 48 inch rear projection TV

Try going into the menu and find something called, "center channel input." If it is on, the sound will not work. Turn it off, and the sound should be restored.

Posted on Dec 15, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

My tv jumps with red lines while watching. JVC


It sounds like the begining of as convergence problem or cold solder on convergence board - have a tech have alook

Sep 14, 2009 | JVC AV-48WP30 48" Rear Projection...

1 Answer

I'm seeing double pictures/letters on my 48inch JVC (I'ART) projection big screen tv. It's like the yellow wants to separate from the rest of the colors. What could be causing this problem? The tv is about...


one of the convergence ICs is probably defective, you will need a soldering iron to replace this . there are 2 of them,they start with a part no STK392-XXX

Jun 07, 2009 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Jvc av-48wp74 48 in. just blanked out


check the power supply board remove the back cover just follow the power cable/plug in cord, remember unplug the tv set first you will see a fuse on the power supply board maybe is pop/open if no luck sell parts on ebay will get $$$....

Jan 17, 2009 | JVC AV-48WP74 48" Rear Projection...

1 Answer

The t.v.just went blank while watching it.


Power boards are like time bombs. When it's time is up, it's up. Since it is 3 yrs old, I would buy a new tv. Most TV parts only last 3-5 years anyways. It did a good job.

Nov 14, 2008 | Televison & Video

1 Answer

JVC AV-36870- After watching for awhile, screen goes blue and sound squeals


Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/

Oct 14, 2017 | JVC AV-36890 36" TV

1 Answer

Jvc floor model Tv


I have a 54inch jvc floor model with no sound and it will show a picture then the picture goes out and power button flashes red, can this problem be fixed

Jun 06, 2008 | JVC AV-48WP74 48" Rear Projection...

2 Answers

JVC tv shut off and won't come back on


It is a power supply problem. As your set is nine years old all the electrolytic capacitors at the power supply area may be out of range. If you are not familiar with electronic repairs it is bettter to take to service center to check and decide according the cost you will asked.

Feb 17, 2008 | JVC AV-36950 TV

2 Answers

Jvc tv on button flashing on av 48wp34


Use remote, sounds like Tv is in child lock

Dec 21, 2007 | JVC AV-48WP30 48" Rear Projection...

1 Answer

I have a JVC AV-48WP74 48" Widescreen HD-Ready Projection TV.


this could be a number of things, you should take it to a local repair shop.

Nov 27, 2007 | JVC AV-48WP74 48" Rear Projection...

1 Answer

Jvc tv picture quality


sounds like your crt tubes...meaning Red, Green and Blue are out of alignment...or possibly 1 of the crt's is burned out.

Jan 29, 2007 | JVC AV-48WP30 48" Rear Projection...

Not finding what you are looking for?
JVC AV-48WP30 48" Rear Projection Television Logo

Related Topics:

490 people viewed this question

Ask a Question

Usually answered in minutes!

Top JVC Televison & Video Experts

The Knight
The Knight

Level 3 Expert

75178 Answers

Jaime Hernandez

Level 3 Expert

2335 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

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

Answer questions

Manuals & User Guides

Loading...