Question about JVC AV-27720 27" TV

4 Answers

Jvc AV-27720 I have this tv and the screen has gone black with the picture consisting of one line of the screen being it. I read that because when I would hit the side the entire screen would come back in the past, although that is no longer working, it could be the vertical amplifier. The problem is I am not sure where that is and how to locate it. Please help. I can't really afford a new tv at the moment.

Posted by on

Ad

4 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 89 Answers

The vertical IC is usually a LA7832. from what you are describing im guessing that you have some bad solder connections

Posted on Mar 12, 2009

  • wayne chamberlain Mar 13, 2009

    the LA 7832 has 8 pins and is screwed onto a heat sink. usually close to the large flyback transformer

×

Ad

In my case the solution for this problem was the transistor replacement. The jonction E-C and B-E was bad. Rplacer by the ECG 2331 part on NTE.

Posted on May 21, 2007

Ad
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 337 Answers

There are different shapes of vertical output Ic's,the most popular is about 1.5" wide,it has 10 pins coming from one side thru the board and soldered to the chassis,it is mounted in a heat sink,the problem was intermitant maybe because one or more of the pins needed to be resoldered but sometimes after a while the IC gets damaged and it needs to be replaced but I will try resoldering it first and if that does not work then replace it,if the IC went bad it might have taken the safety resistor that gives him power,keep this in mind if you replace it and you still get a line across.If you are familiar with tv service you can check all the conections being carefull the set is not plug in and staying away from the high voltage lead wich is the thick red wire that goes from the chassis to the back of the picture tube.Let Us know how it goes or if you need more information.

Posted on Oct 31, 2006

  • Omar Urrutia
    Omar Urrutia Oct 31, 2006

    Your rating response is also important.

×

In my case it seems to be the transistor.

Posted on May 21, 2007

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 there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

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

Anu po pwd na ikabit na i.c no. sa jvc model av-21mt35


If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy Pull up older posts. Surf the site with patience.
http://electronicshelponline.blogspot.com/

Apr 21, 2014 | JVC AV-27720 27" TV

1 Answer

JVC flatscreen tv model Number AV-21mt35 with vertical interference? how to solve this problem?


It will be best to replace its Line Output Transformer [LOT]. It is not good to join the broken EHT wire. EHT arcing cannot be stopped by using glue.

Apr 04, 2013 | JVC AV-27720 27" TV

1 Answer

Describe your jvc av-27720 Problem no power main fuse ok.


Look in middle of board for C926 or location like that--it should be 1000 mfd at 35 volts--fails a lot in these sets.

Let me know if you have questions as I am here to help.

SD TECH

Aug 25, 2010 | JVC AV-27720 27" TV

1 Answer

Tv has a flat light across the middle of the screen. thats all it will do.


Very common issue is bad connections on the vertical output IC. If you can tap on the main board and the picture starts working or you see it flash to a full picture intermittently then you will need to re solder the IC. The location I believe is IC1421 on it should be near a connector and wires that are yellow and green in color. Please take a moment to rate my answer. Thanks...

Nov 24, 2009 | JVC AV-27720 27" TV

1 Answer

Sound is fine, picture not


You have a vertical deflecttion chip that is going bad. Probably a LA7832. There is also a good chance that you have a leaky capacitor and bad zener diode. The capacitor is east to get , the zener diode part # is MTZJ75. These repairs are usually best left to a professional

Feb 22, 2009 | JVC AV-27720 27" TV

1 Answer

The only thing that happens is the red power light is flashing


The Vertical output ic is bad la7832 also has an open resistor in power supply off of pin 7 the ic.
Root cause is probably the zener diode next to the IC itself MTZJ75

Dec 23, 2008 | JVC AV-27720 27" TV

1 Answer

JVC AV-27720 TV Problem: Picture goes to horizonal white line in center.


In most cases the following parts need to be replaced I think the part location numbers are accurate
IC421 LA7832 ( vertical output IC )
Capacitor C424 100UF @35v
Zener Diode D422 MTZJ75-T2
Resistor R541 1.8ohm 2watts

Oct 23, 2008 | JVC AV-27720 27" TV

3 Answers

JVC AV-27720 27" TV manual


GO to www.Service Manuals.net you should be able to find it there!ThankYou for using FixYA.Have a Nice Day.

Feb 17, 2008 | Televison & Video

1 Answer

JVC AV-32F704 32" TV Picture is blurry - cannot read any writing on the screen


You didn't mention if you saw fine white diagonal lines running through the screen from top to bottom. If so, you likely have a shorted Picture Tube which is not usually fixable. If there are no lines seen running through the screen, then it is possible the High voltage transformer which also has a screen voltage and focus control built in that could be bad. I would expect the cost of that part to be about $100, so the repair cost total could approach that of a new set I would guess.

Apr 12, 2007 | JVC AV-32F704 32" TV

Not finding what you are looking for?
Televison & Video Logo

155 people viewed this question

Ask a Question

Usually answered in minutes!

Top JVC Televison & Video Experts

The Knight
The Knight

Level 3 Expert

75756 Answers

Jaime Hernandez

Level 3 Expert

2336 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...