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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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

The remote control that came with my Philips Flat Screen TV, Model 42PFL3603D/F7, no longer works.

The best that can be done by you:
1. check the battery , replace if bad, check the battery terminal too, if bad clean.
2. Remove the covers, use a good soldering iron to solder the crystal and the processor in the board, use a thin needle to clean the pins after soldering to ensure that there is no bridging in the circuit.
3.use a dry wipe to clean the surface of the board. check if the IR Leds are working or out of circit, if so replace.
4. The transistors switching the IR should be checked.
5. If carbon pads are bad replace with spare dots available or use a carbon pen to line.
use a multimeter to check if the IR works ,if not the IC can be faulty
If none of the top works youmight have to cchange the IC .

Hope the advice helps.

Aug 26, 2010 | Philips 37PF7320A 37 in. HD-Ready LCD...

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...

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

Transistor lost.

if you are replacing 7402
also replace diode 6404 this diode even thou it test goo will in long term overheat 7404 and caus it to go bad by leakage.
and if 7402 gose bad it is regulating the 15v stanby volts that is 7412 is also going to be bad so replace 7412 also
the part numbers are:
7402 = # 932211676682

7412 =# 932210514682


Jan 13, 2009 | Philips 19PR19 19" TV

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


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...

1 Answer

Sony Trinitron KV-32FS320 4 blinks

First, understand the dangers of high voltage and charged capacitors inside a TV set! Discharge all capacitors and the picture tube in a safe way before proceeding.

What kind of IC is it?
If SurfaceMounteD:
1. Heat the IC pins and use a solder wick to remove ALL solder tin.
2. Use a sharp screwdriver or a knife to gently lift the IC from the PCB. Pay close attention if any of the pins is still attached to the PCB, if so, repeat step 1. Be careful, if you break the PCB, the Sony is ready for the dumpster...
3. Put the new IC in place, begin to solder pin 1, and then the pin most far away from pin 1.
4. Solder the rest of the pins, as quick as possible to not overheat the IC. Don't care if solder short circuit the pins.
5. Use a solder wick to remove all eventual short circuits that was the result of 4.
6. Inspect one more time to be 100% sure no short circuits remain.
7. finished.

If mounted through holes:
Same as above, with following additions:
1. a possible addition of a solder sucker.
4. The speed is still important, but since the pins are not so close, you should be able to do it without shorting.

Dec 31, 2007 | Sony FD Trinitron WEGA KV-32FS120 32" TV

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