Question about Philips 27PT6441 27" TV

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TV mod #27st6210/27 Lo4 chassis

This set has a vertical colapse, i cant get a service manual or schematic Lo4 chassie got voltage of to i can check on vert transistors or mabe a common problem, cap or sutch?

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I foud the solution with a master remote for this tv, it was in the setup of vertical ,using master remote and secret service code. thanks to all for trying to help , the master remote is a specail order and is an all green remoterc (rc92573/01) set not set up right from factory!

Posted on Nov 08, 2008

No code

Posted on Jul 22, 2008

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Posted on Jan 02, 2017

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NM2168(020731) 14" TV. Vertical circuit


The spark that you saw was probably caused by a cold solder ..remove the old solder,clean the pcb make sure that the track is still ok..if there is a break its ok to jump it with no.22 AWG solid copper wire.Some tv version gets the 24vdc supply for the vertical circuit from the flyback transformer.Also check the vertical IC for cold solders ..hope your problem is confined to cold solders only..good luck

Dec 17, 2010 | Televison & Video

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RCA TV Console


Download User Manuals
PortableMedia.ManualsOnline.com Get Portable TV Instructions RCA Television Try this link it says its free

May 27, 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

My tv. proscan mod. ps50700 won`t turn on


The PS50700 uses the 195 series chassis. The most common cause of the set not starting up is a shorted flyback (high voltage) transformer. Sometimes a shorted flyback will also cause the horizontal output transistor to short too. These parts need to be tested and/or replaced by a tech familiar with the RCA 195 chassis.

Aug 17, 2007 | Proscan PS65000 65" Rear Projection...

4 Answers

Mitsubishi WD-62525


What is your problem now ?

What do you require ?

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Jan 26, 2009 | Mitsubishi WD-62525 62" Rear Projection...

1 Answer

Rca projection tv serv#p56938yx mod#p56938 serial#c135c50tx chassis#ptk195s16p cant id


Here are some numbers to call for Flyback Replacement
Electronica 1-800-772-5578
Asti 1-800-221-1828
you will need RCA chassis# PTK195s16p - flyback number1541938b.
ThankYou for using FixYa. Have a Nice Day.

Feb 07, 2008 | Televison & Video

2 Answers

RCA P52960 Deflector Circuit Schematic


You can buy the complete squematic at www.servicemanuals.net by using the model number,log in and go to service manual to the right of the page the put in the brand and the model number.They will give price and availability.

Oct 13, 2006 | RCA P52960 52" Rear Projection Television

1 Answer

Picture problems


you have a vert sweep colapse. Fisrt thing is to get a schematic diagram and find the vert. output Ic and the clamper diode. Measure the voltage on both sides. If its low then its apossibility that the Ic was drawing loads of current and blew out the b+ feed resistor. Look on the schematic and trace back the voltage line from the vert output ic back to the sweep power supply on the secondary of the flyback transformer. check the limiter resistor to the feed and if its open replace the cap right there the resistor as well as the vertical output Ic ALL AT ONCE!!! If you dont you will cause it to go out again in a short time. Good Luck.. If you post the vert part of the schematic I will be more then happy to assist you with this repair.

May 01, 2006 | Symphonic SC3813 13 in. TV/VCR Combo

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