Question about Televison & Video

1 Answer

Partial horizontal collapse. Nu-tec Model NTT-829A

I have replaced IC Tda3654. I have replaced all electrolytic capacitors in high voltage circuitry and som of the non polarized cap's. High wattage resistor 436 on pc board measures 4.6k ohms but cannot determine what the actual resistance is supposed to be as the colors are totally discolored due to the heat the resistor dissapates. Do you know where I can get a circuit diagram or do you have any ideas to rectify problem?

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 280 Answers

If you have retrace lines I would recheck all caps around the vertical IC 100@16 is the most common 47@35 and 220@35

Posted on May 30, 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

No power out


You have no power because you didn't fix 2 or 3 electrolytic capacitors when you saw warning signs. Warning signs start as horizontal lines every half inch or so. Black bars on the top and bottom, then collapsing to a horizontal line, then complete failure.
You will need a horizontal output transistor, the aforementioned electrolytic capacitors, a voltage rectifier, possibly a high voltage coil called a flyback transformer, wire wound resistor, maybe a low resistance resistor, maybe a high voltage capacitor. In some tvs you need an EPROM ic. I hope you can find someone with the knowledge and expertise these days when the modern throwaway society put almost all electronic repair shops out of business. It may cost about $300 - $400 to get repaired or you can get a modern flat-screen tv for $800 - $1,000 and reinvest that money.

Nov 27, 2013 | Televison & Video

2 Answers

Tv on appears black screen with a bright horizonal line in the middle sometimes with voice


You will have to resolder the vertical IC and in most cases replace any capacitor that is near and next to the vertical IC. There may be three capacitors that will be replaced, And while you are in the process of reworking the board inspect for any and all grounds that may need resoldered. You will have to look very close to find these. And you should search the deflection side of the board for two capacitors that have a 160 volt to 250 volts at 1MF, or 2.2 mf or 4.7Mf. By now these little guys are weak and need replaced. Thanks for asking and show a few hands of support!

Jan 27, 2011 | Panasonic CT-32G23 32" TV

2 Answers

TV has a line across middle from left to right


It depends what part was damaged in Horizontal section. Here in Philippines labor costs for this size of TV is ranging from $50 to $150.

Feb 27, 2010 | Televison & Video

2 Answers

My TV picture has collapsed to a single horizontal line


If it is an standar analog tv, I'm sorry to tell you but, is time to get a new one.

Dec 05, 2009 | Panasonic Televison & Video

1 Answer

TDA3653 keeps blowing when the TV is switch ON


Without checking components associated with the TDA3653, the exact cause is impossible to say.
This IC has extensive built in protection circuitry that should protect it from overloads caused by such things as shorted turns in the vertical deflection coil, or from faults with any associated components, e.g. open/shorted resistors/diodes/capacitors.
The following data sheet describes this IC in detail:
http://www.datasheetcatalog.org/datasheet/philips/TDA3653.pdf

Therefore as the IC keeps failing at switch on, and if no other components are failing or suffering damage, suspicion must fall on the supply voltage delivered to Pin 9 and Pin 6 being excessively high (or spiked) and thus causing a rapid demise of the IC. As most LV (low voltage) supply voltages in TVs are derived from a common regulated source, this would imply that the power supply circuitry itself may be faulty - dried out electrolytic capacitors being prime suspects.

However, as with any fault in complex circuitry such as this, there may be other causes including less logical ones such as dry joints or shorts in wiring or between PCB tracks.

Nov 23, 2009 | Sansui Televison & Video

2 Answers

Horizontal line across screen


HELLO
This is called "Field Collapse". Line collapse is different (a single vertical line) in the centre of the screen.
But field collapse is usually a fault in the field circuit (possibly a field output IC has gone short circuit) or electrolytic capacitors have dried out. The same can happen in a CRT TV - looks as if LCD panels are the same way! I think you will have to take this to a service centre.
GOOD LUCK! (:-)

Sep 12, 2009 | Memorex Televison & Video

1 Answer

Thin horizontal line accross screen


if the screen is totally black and only white horizontal line appear on the screen, check the vertical section if there is supply voltage on the vertical IC, and if there is none check the source of some open resistor connected to that IC. if there is supply voltage check all electrolytic capacitors connected in that vertical IC and it is better to replaced them all they are very cheap. and if it is still not working replace the vertical IC. post some comments if it is still not working and let see what we can do..

Aug 11, 2008 | Televison & Video

1 Answer

Proscan PS27123 TV Problem


just to be sure, is it vertical or horizontal? Anyway, if it is vertical, it could point out to the vertical Ic section or some loose contacts along the lines. If it is horizontal, it could be a filter capacitor along the horizontal Circuitry. Mark the high voltage capacitors along the high voltage sections.


regards,

chris

Jul 23, 2008 | Proscan PS27123 TV

3 Answers

Sony tv no picture only horizontal line


The probable defective part is the vertical IC. If changing that does not resolve the problem, check the capacitors in the same circuit. Also, check for the proper voltages at the vertical IC. If the IC is not being fed its power, it won't work either. I don't have a listing for your specific model. If you can post the vertical IC part number (LA7837 for example), I can list the voltages per pin.
Dan

Apr 09, 2008 | Televison & Video

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

Related Topics:

140 people viewed this question

Ask a Question

Usually answered in minutes!

Top Televison & Video Experts

The Knight
The Knight

Level 3 Expert

72620 Answers

Electro Med Services...
Electro Med Services...

Level 3 Expert

6694 Answers

yadayada
yadayada

Level 3 Expert

70347 Answers

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

Answer questions

Manuals & User Guides

Loading...