Question about Philips Magnavox 9P6034C 60" Rear Projection Television

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NO HIGHT VOLTAGE

I HAVE PROBLEM WITH HIGHT VOLTAGE EVERTHING LUX IS WORKING EVEN ALL THE TRNSIST. AND IC CONSUM AND GETS HOT
BUT NO HIGHT VOLT.
TO THE PIC TUBE THIS USED 3 MODULE

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  • Philips Master
  • 8,617 Answers

Sounds like the LSB is defective as that controls all the high voltage and deflection circuits. If you go to the following link and leave them a email with your model number they should have a LSB board for your model.
http://servicemanuals.vstore.ca/

Posted on Nov 23, 2008

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Posted on Jan 02, 2017

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3 Answers

No sound model 32pw8807/79


You can also try a hard reset: Unplug TV from AC mains and remove all cables from TV. Wait about 30 minutes and replug to AC power and redo the cabling. Switch on the TV and see if it works..

This could be due audio amplifier problems in the tv , If you would like to attempt a DIY, you will need a service manual to guide you. You can find one here:
http://servicemanuals.vstore.ca/

However, be aware that there are voltages inside your TV set that can kill, even if unplugged. Or you can contact company service center if within warranty ,else you give it local service center...

Good luck....

Jul 13, 2008 | Televison & Video

Tip

How to find and replace a defective vertical IC.


When your TV works, has sound, good indicator light but all you have for a picture is a horizontal line across the screen, you have no vertical drive. This can be caused by the IC overheating or a power spike. In addition if you have a newer TV (projector) it may not turn on and will only blink an error code.

This is not a difficult fix but requires patience, good soldering skills and dilligence. Begin by unplugging the set and removing the rear lower area. Around the perimeter of the section you will see screws. Some will have arrows pointing at them. Remove all these screws and remove the rear cover.

Now you should be able to see the entire chassis. It will be mounted on a plastic frame and will consist of two or more circuit boards. The one, usually on the left, will be a small signal board. The one on the right will be the low voltage power supply, high voltage power supply and you guessed it, the vertical drive section.

The vertical IC is located near where the wires from the yoke which are red,green,yellow and blue terminate on the main board. The yoke is a large coil on the rear of the CRT which spreads the beam. It is slid over the glass CRT. Follow the wires (which should be green, yellow, blue and red to the circuit board. This will be the vacinity of the vertical IC. It will be mounted to a large heat sink and generally the designation begins with "LA" followed by 4 numbers. Panasonics generally begin with TDA.

Once located, remove and replace the unit. Removing the unit will probably require removing the circuit board. This involves removing all the screws around the perimeter of the board and any which you find in the center of the board. Do not force it, if it will not move easily look for and remove more screws.

You can get the replacement parts at http://www.encompass.com . Make sure you clean off the old heat sink compond and reinstall new heat sink silicone also available at the same web site. The heat sink compound facilitates heat transfer to the heat sink and keeps the IC cool. Generally the ICs are run at a high output and get very hot.

After replacement of the IC check all the safety resisters near it for continuity and also any and all diodes for integrity. These parts would be in the vicinity of the heat sink. Removing the IC may require prying it off the heat sink as many times the heat sink compound acts like a glue.

If everything checks ok you should have a working set.

If you do not have vertical drive, you will need a schematic to find the power source for the IC and test the circuit to see if it has the proper voltages.

You can sometimes get schematics from http://www.encompass.com but they do not have all of them. If you do not mind paying about $16.00 US you can get any service manual from http://www.servicemanuals.net .

Once the proper power is supplied to the IC you should have a working set.

Remember to use an isolation transformer anytime you are going to check voltages in the set. Modern TVs have the chassis attached to neutral making a 60 volt difference between the chassis and hot side. This means that if you do not use an isolation transformer and apply a DVM with a low path of resistance you will cause a direct short and blow the fuse, if you are lucky. Also remember to be careful when measuring voltages as there are lethal voltages in a TV when plugged in and running.

Thanks for using FixYa and for the great rating.

hardrocko

on May 11, 2010 | Televison & Video

1 Answer

Regarding 29gx1891/56r Philips Colour TV,LED keeps on blinking.


The problem was detected as a case of unregulated Power Supply Output. A sort of Crowbar is set in operation if the Power Out is above tolerable limits, which cuts off the supply to the Horizontal and etc. IC TDA 8362. The diagnosis was a faulty PWM IC 3842.

Jan 27, 2009 | Televison & Video

1 Answer

Help


resolder the vertical IC that is whats making the CRTs go blank. Its a safety issue where the CRTs blank when there is no vertical deflection. Just resolder the output IC that should cure your problem

Mar 12, 2008 | Toshiba 43H70 43" Rear Projection...

1 Answer

TV problem


Over Current Protection
Pin 1 of IC951 is also the Over Current Protect input.
The internal FET.s ground return is at pin 2 of
the IC. The voltage drop across R955 and R956
indicates the FET.s current, and is coupled through
R953 to pin 1 of the IC. The Over Current Protect
circuit is activated if the voltage at pin 1 of the IC
exceeds 1.35 volts.
Stabilization and rough regulation are provided by
feedback from pin 3 of T951 to pin 1 of the IC. Fine
regulation feedback is from a secondary supply,
through the Photo Coupler, PC951, to pin 1 of IC951.
Its possible that Diode D953 is leaky allowing the voltage to rise on pin 1 of the IC

Feb 23, 2008 | Mitsubishi VS-50605 50" Rear Projection...

1 Answer

Toshiba 43hx70


i dought it, check aroiund the convergence ic's "stk392-xxx"

Feb 08, 2008 | Toshiba 43HX70 43" Rear Projection...

1 Answer

Powers up no pic


You have a bad solder connection in the Vertical deflection circuit. Try re-soldering the vertical output IC and the Vertical yoke pins. You may have to look over the Vertical circuits with a magnifying glass to actually find the bad solder . A hint if the solder looks dull re-solder it.

Jan 23, 2008 | Toshiba 43H70 43" Rear Projection...

1 Answer

The image is gone and is now only three lines green red and blue. How to fix it?


Hi, Your problem is what you call vertical defflection circuit section, it is very rare that you would see the three line in the midle of the screen because they have protection narmaly to shut down the set's.
How to fix this, well you must locate the vertical ship, to see what it is, it narmaly say's on it LA7830 or LA7833 or LA7838 and Bla Bla Bla look for LAxxxx , ( a small ic flat standing upward, about 11/2" and 3/4" in hight and about 1/8" in thinkness) if it look's burt when you know what to do, I would also check to see if other parts that supply's the voltage to this ic's is burt, narmaly 12 to 30 volt dc., It may be also be located on a seperat board with the convergence, these or two big ic's starting with the part # STK, not to shure on you unit, don't have the schematic, but may be a board with lot's of Transistors , narmaly now these day's no one repair board, they just replace them, this is why it cost so mutch to fix.

I hope this help's

What About Bob
Bob
Timmins, Ontario

Apr 09, 2007 | RCA P46921 46" Rear Projection Television

1 Answer

Mitsubishi vs-4507ca


It just click ON and OFF, right? If you hear the hight voltage noise tring start, may be the Tv has bad vartical IC or regulator IC. If you have no experience with electronic you will need a technician to halp you.

Sep 11, 2006 | Mitsubishi VS-45607 45" Rear Projection...

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