Question about Philips 9P5034C 50" Rear Projection Television

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Philips 9p5034c replaceing IC 7412 ...pad on pin 4 came off does anyone have a diagram to circuit board....

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Re: philips 9p5034c - Philips 9P5034C 50" Rear Projection Television Projection Televisions


Posted on Jul 16, 2008

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When you try to turn the tv on, all you get is a blinking red light, if you unplug for awhile, sometime it will come on.

Symptom: tv turns on, tv clicks once, red light comes on. Then, tv either works for a while, followed by a click, no video, normal sound and flashing red light; or, tv immediately clicks, no video, no sound, red light flashes. If that is the problem, you need to replace the convergence ICs. I had to do this twice. The two convergence ICs are mounted on palm-sized aluminum heat sinks. The heat sinks are soldered to the main circuit board. There are 4 pins soldered to the board for each heat sink, and 18 pins soldered to the board for each IC. Some of the heat sink pins are a bit difficult to desolder. The pins for the ICs are not difficult to desolder, but you must be careful not to overheat them. The heat sink and the IC come out as a unit, after all pins are desoldered. The IC is screwed to the heat sink. The correct replacement IC is a Sanyo STK392-110. I got mine from B&D Enterprises. They were not expensive. The new ICs need to be mounted to the heat sink with a heat transfer paste. I used Arctic Silver from my computer processor heat sink. Installation of the heat sink/IC assembly is a bit tricky, since you have to align all 18 IC pins and the 4 heat sink pins. When all the pins are visible through the holes in the circuit board, resolder everything. The TV should now work. Be sure to replace both ICs. My first repair was done by a technician, who obviously only replaced one. That repair only lasted a couple years, before the problem returned.

Mar 22, 2011 | Toshiba TZ55V61 55" Rear Projection...

1 Answer

Screen seems to shrink and get a red and blue line on each side of picture then returns to norm size. It only did it for a number of minutes when turned on now does it all the time.

you have a opto isolater on the power deflection board failing its a 8 pin dip pack ic
its on the board at the rear of board on right side there are three ics its the middle one 8 pin

Oct 24, 2009 | Philips 9P5034C 50" Rear Projection...

1 Answer

I have a magnavox 37 in lcd television


Aug 24, 2009 | Philips Magnavox 9P6034C 60" Rear...

2 Answers

My 64 inck philip's magnavox

More like it the IC 7412 is junk. Change it will fix your problem.

Jul 13, 2009 | Philips Magnavox 9P6034C 60" Rear...

2 Answers

Philips TV model 60PP9202/17F veins circuit board destroyed

Email the team at - they may have a photo or service manual for that model.

Jun 14, 2009 | Philips 55PP9401 55" Rear Projection...

1 Answer

How hard to replace ICs?

Remove the 4 screws going through the IC's, unsolder the 18 pins each IC, take a small flat head screw drive place it between the heat sink and IC and pound gently until the IC breaks free, wiggle the IC's to make sure all pins are free and remove them.

Take rubbing alcohol and a Q-tip and clean where you need to resolder. "So you can see the pads better." Put heat sink compound on the heat sink, slide the IC's back in, secure them with the screws, solder the pin's making sure you don't blob pin to pin.

Jul 18, 2008 | Philips 60PP9202 60" Rear Projection...

1 Answer

Nothing working

The opto IC chip has failed. Try - They have instructions and kits on their site.

Apr 21, 2008 | Philips 9P5034C 50" Rear Projection...

1 Answer


Hi, you need to replace IC 7412 part number 4835 2098 8561 this is a veeery common failure for your set, it`s a pain to get out and new one back in but it will fix your problem, looking from the back into the set it`s located on the right, rear side of the board, there are several of them close together, be sure it says cnw136 on the top of it and if you do it yourself put the new one in exactly the same way as the other one came out, if you rotate it 180 degrees it will fai at turn on, 8 pin IC with "cnw136" printed on the top of the IC, BMW Rider

Jan 11, 2008 | Philips 9P5034C 50" Rear Projection...

2 Answers

Philips 60pp9202 sound but no picture

Sorry no pic, but if you look from back of set on deflection board(board with HV transfromer)big part with about 4 wires coming out going to your picture tubes. Looking close to leftside of board the last IC with heatsink shield standing up has a small 7 pin ic if looking on it you should see TDA8177 or something to that affect. This is the verticle IC. Since you have found the IC's (convergence) then the only thing left is to look for open fuses like 1300, 2004, 1900 etc and see if open. Concerning cost if you buy from these part are inexpensive so it wouldn't hurt to buy all. Rule of thumb, if set has color problem then Convergence IC, if no problem just went out one day while playing fine then Vertical, then the alternative if no sound the audio area, which is not common for this set. Hope this helps!

Sep 03, 2007 | Philips 60PP9202 60" Rear Projection...

2 Answers

Philips 9p5034

It is probably something as simple as a bad electrolytic capacitor in the vertical output circuit. if you are handy with a soldering iron, you can change it yourself for less that $10. If not, check with your local repair shop for an estimate and make the decision on repair or replace based upon the cost of each. Panasonics are usually a very reliable set and if it is good shape otherwise, it is probably worth getting repaired. Incidentally, continuing to operate the set in this condition will blow the vertical IC and add to your expenses.

Jan 13, 2006 | Philips 9P5034C 50" Rear Projection...

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