Question about Philips 60PP9352 60" Rear Projection Television

1 Answer

Power turns off immediately.

I was wondering if you could explain where the transistors are located? I am hurting without this tv right now. It used to only click once then try again and worked. Then moved to 2-3 trys. Now none. just one click and turns off. thanks alot.


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  • 5 more comments 
  • Robert Dressler Jan 19, 2009

    Does that sound the same? the tv is cold, just clicks on and then off. what would you suggest? Thank you very much for fast response.

  • Robert Dressler Jan 19, 2009

    **** I really cannot afford to hire someone. Is there a way to take pics and send them to you? I really do appreciate what you are doing for me. thanks. I have the service manual and still have no idea where the HV gen is. What do transistors look like? and also how hard would it be to fix it? I am somewhat ok with soldering. Thanks

  • Robert Dressler Jan 19, 2009

    you are great. thanks. I will take the board off and see what the soldering looks like. Do you think the soldering goes bad or the part most of the time? If so, how would I test it out without buying a new one. You were very helpful. thanks.

  • Robert Dressler Jan 19, 2009

    While looking at the HV that is not noticeably bad but I noticed right next to it listed as Coil, 5u1. . 2422 549 45206 in the service manual. it looks crinkled up at the top, I dont know if it normally looks like it but might be something. here is the pic of the coil and hv. thanks.










  • Robert Dressler Jan 19, 2009

    ok, I will take the circuit board off and look for some bad solder. Wouldnt the hot transistor be only hot when on a long time? I may be wrong. but.... I really dont want it to be the board. How much is a board? Do you have any idea where to order or buy one or even what exactly it is called? Thank you very much. Robert



  • Robert Dressler Jan 30, 2009

    I talked with a guy at work that says he thinks that it could be the switch that is shorting then finally gave out. Does that sound like something it could be? I was looking at the schematic and cannot seem to find the switch on the board. Any ideas? Thanks alot.


  • Robert Dressler Jan 30, 2009

    yes the light does turn on. ****. I have put off taking off the board. but I guess I have no choice. Im calling a repairman.

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  • Philips Master
  • 8,617 Answers

They are located on the center board mounted to aluminum heatsinks

Posted on Jan 19, 2009

  • 2 more comments 
  • Sonny Berry
    Sonny Berry Jan 19, 2009

    Its usually related to a bad solder joints around the HV generator or Hot Transistors on that model, Bad solder joints will appear dull gray instead of bright silver

  • Sonny Berry
    Sonny Berry Jan 19, 2009

    this what the hv generator looks like there will be three large red wires coming out of the top of it

  • Sonny Berry
    Sonny Berry Jan 19, 2009

    Yes, thats normal for the coils. Thats shrink wrapped to protect the copper wire tat is raped around the coil. Often it can be solder , however if you dont ntice any that appears dull gray it will most likely be a HOT Transistor and HV generator or a Bad LSB board.

  • Sonny Berry
    Sonny Berry Jan 30, 2009

    It could be the switch possibly. the switch is actually on the front keybaord panel. although if the power led lights up when the power button is pressed that indicates the switch is functioning

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1 Answer

Hello, I have a 52in RCA projection tv, model D52W20BYX1. It used to work fine but now whenever i try to turn it on it the power button light turns on and the tv makes a short whistle sound, this happens...


Hi,
Not sure why chat got closed/ disconnected.
There is big transistor TL010 attached with heat sink near flyback transformer, this is horizontal output transistor, check it and replace if found shorted.
Thanks.

Apr 08, 2011 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

My Panosonic TV Model# PT-47WX42F will not turn on. It clicks like it wants to turn on but does not. The power light is flashing 5 times


5 blinks is error code for short on 140 volt line inside the set; it usually means the Horz output transistor is shorted. If you have a ohm meter (used for checking fuses etc) there is a simple test to see if this is the problem.

Also associated with this is a bad capacitor near it (Location for the Transistor is C509 and the transistor should be location Q551)

Location numbers are printed on top of board near part; both parts are on (as seen from back) far right board near the large black part with big red wire coming out of the top.

Transistor is just to the left of it and cap forward about 3 inches.

If this information told you something you did not know rate this solution as very helpful as I do this here for free.

SD TECH

Aug 30, 2010 | Panasonic PT-47WX53 47" Rear Projection...

1 Answer

Tv wont turn on?


Hello,
first you have to open the back cover of the television to check for blown fuses.

A blown fuse is a very common type of fault due to poor design very often triggered by power surges due to outages. However, the most likely parts to short are easily tested, usually in-circuit, with an ohmmeter and then easily removed to confirm.

Note that it *may be* useful to replace a fuse the *first* time it blows (though it would be better to do some basic checks for shorted components first as there is a small chance that having a fuse blow the second time could result in additional damage which would further complicate the troubleshooting process). However, if the new one blows, there is a real problem and the only use in feeding the TV fuses will be to keep the fuse manufacturer in business!

Sometimes, a fuse will just die of old age or be zapped by a power surge that caused no damage to the rest of the TV. However, it must be an EXACT replacement (including slo-blow if that is what was there originally). Else, there could be safety issues (e.g., fire hazard or equipment damage from too large a current rating) or you could be chasing a non-existent problem (e.g., if the new fuse is not slo-blow and is blown by the degauss circuit inrush current but nothing is actually wrong).

If the fuse really blows absolutely instantly with no indication that the circuits are functioning (no high pitched horizontal deflection whine (if your dog hides under the couch whenever the TV is turned on, deflection is probably working).) then this points to a short somewhere quite near the AC power input. The most common places would be:

Degauss Posistor - very likely.
Horizontal output transistor.
Power supply regulator if there is one.
Power supply chopper (switchmode) transistor if there is one.
Diode(s) in main bridge
Main filter capacitor(s).

You should be able to eliminate these one by one.



Test the rectifiers individually or remove and retest the resistance.


If these test good, use an ohmmeter with the set unplugged to measure the horizontal output transistor. Even better to remove it and measure it.

C-E should be high in at least one direction.
B-E may be high or around 50 ohms but should not be near 0.

If any readings are under 5 ohms, the transistor is bad. The parts sources listed at the end of this document will have suitable replacements.

If the HOT tests bad, try powering the set first with your light bulb and if it just flashes once when the capacitor is charging, then put a fuse in and try it. The fuse should not blow with the transistor removed.

Of course, not much else will work either.

If it tests good, power the set without the transistor and see what happens. If the fuse does not blow, then with the good transistor (assuming it is not failing under load), it would mean that there is some problem with the driving circuits possibly or with the feedback from the voltages derived from the horizontal not regulating properly.

Look inside the TV and see if you can locate any other large power transistors in metal (TO3) cans or plastic (TOP3) cases. There may be a separate transistor that does the low voltage regulation or a separate regulator IC. Some TVs have a switchmode power supply that runs off a different transistor than the HOT. There is a chance that one of these may be bad. If it is a simple transistor, the same ohmmeter check should be performed.

If none of this proves fruitful, it may be time to try to locate a schematic.

A blown fuse is a very common type of fault due to poor design very often triggered by power surges due to outages or lightning storms. However, the most likely parts to short are easily tested, usually in-circuit, with an ohmmeter and then easily removed to confirm.
But if otherwise your power supply board is dead, It can be dead at anytimes.Tries websites Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.
Hope this helps....

.

Jun 05, 2010 | Zenith R57W46 57" Rear Projection...

1 Answer

Wont turn on


Hello,

A blown fuse is a very common type of fault due to poor design very often triggered by power surges due to outages or lightning storms. However, the most likely parts to short are easily tested, usually in-circuit, with an ohmmeter and then easily removed to confirm.

Note that it *may be* useful to replace a fuse the *first* time it blows (though it would be better to do some basic checks for shorted components first as there is a small chance that having a fuse blow the second time could result in additional damage which would further complicate the troubleshooting process). However, if the new one blows, there is a real problem and the only use in feeding the TV fuses will be to keep the fuse manufacturer in business!

Sometimes, a fuse will just die of old age or be zapped by a power surge that caused no damage to the rest of the TV. However, it must be an EXACT replacement. Else, there could be safety issues (e.g., fire hazard or equipment damage from too large a current rating) or you could be chasing a non-existent problem.

If the fuse really blows absolutely instantly with no indication that the circuits are functioning (no high pitched horizontal deflection whine (if your dog hides under the couch whenever the TV is turned on, deflection is probably working).) then this points to a short somewhere quite near the AC power input. The most common places would be:

Degauss Posistor - very likely.
Horizontal output transistor.
Power supply regulator if there is one.
Power supply chopper (switchmode) transistor if there is one.
Diode(s) in main bridge
Main filter capacitor(s).

You should be able to eliminate these one by one.

Unplug the degauss coil as this will show up as a low resistance.

First, measure across the input to the main power rectifiers - it should not be that low. A reading of only a few ohms may mean a shorted rectifier or two or a shorted Posistor.

Test the rectifiers individually or remove and retest the resistance.

Some sets use a Posistor for degauss control. This is a little cubical (about 1/2" x 3/4" x 1") component with 3 legs. It includes a line operated heater disk (which often shorts out) and a PTC thermister to control current to the degauss coil. Remove the posistor and try power. If the monitor now works, obtain a replacement but in the meantime you just won't have the automatic degauss.

If these test good, use an ohmmeter with the set unplugged to measure the horizontal output transistor. Even better to remove it and measure it.

C-E should be high in at least one direction.
B-E may be high or around 50 ohms but should not be near 0.

If any readings are under 5 ohms, the transistor is bad. The parts sources listed at the end of this document will have suitable replacements.

If the HOT tests bad, try powering the set first with your light bulb and if it just flashes once when the capacitor is charging, then put a fuse in and try it. The fuse should not blow with the transistor removed.

Of course, not much else will work either.

If it tests good, power the set without the transistor and see what happens. If the fuse does not blow, then with the good transistor (assuming it is not failing under load), it would mean that there is some problem with the driving circuits possibly or with the feedback from the voltages derived from the horizontal not regulating properly.

Look inside the TV and see if you can locate any other large power transistors in metal (TO3) cans or plastic (TOP3) cases. There may be a separate transistor that does the low voltage regulation or a separate regulator IC. Some TVs have a switchmode power supply that runs off a different transistor than the HOT. There is a chance that one of these may be bad. If it is a simple transistor, the same ohmmeter check should be performed.

If none of this proves fruitful, it may be time to try to locate a schematic.

A blown fuse is a very common type of fault due to poor design very often triggered by power surges due to outages or lightning storms. However, the most likely parts to short are easily tested, usually in-circuit, with an ohmmeter and then easily removed to confirm.
GOOD LUCK...

May 21, 2010 | Samsung HCL4715W 47" Rear Projection...

1 Answer

BOUGHT JVC AV-56WP74 IN JUNE 2004. 52


It is worth getting an estimate. From the symptom you explained, it looks like the horizontal output transistor became defective.

Jan 16, 2010 | JVC AV-56WP74 56" Rear Projection...

3 Answers

HORIZONTAL OUTPUT TRNSISTOR SHORTS WHEN POWER ON TV


ALL the next is with the tv unplugged (NO NO power)
  • resold the jungle (video processor) all around
  • following the horizontal drive pulse path and arriving to the horizontal area just after the horizontal transformer and in the base of the horizontal DRIVER there is a electrolytic capacitor (if this chassis uses this one,) Change it (maybe is dry)
  • solder all components i just told you in the last step. horizontal driver, transformer, etc
  • remember:
  • if a transistor is blowing with no reason (there is a reason: the collector receives 130 volts but cannot hold it forever, It has to be in some place. if the switching pulse doesn't arrive to it the transistor throws this 130 volts and burning itself. i hope it is help full.

Apr 15, 2009 | Projection Televisions

1 Answer

No power, blown fuse in power supply


This TV has a few fuses and it not easy to troubleshoot it without the schematics, and is very unlikely that the convergence fuses will cause a complete no power on this TV.
What is the location of the blown fuse?
Where do I send you a copy of the service manual?

Mar 02, 2009 | Sony KP-61V75 61" Rear Projection...

3 Answers

Way too dark


Resetting the TV
NOTE:
Some TVs have a reset button. If available and accessible, try using the reset buttons before using the steps below. Using the reset buttons can save time.
1. Unplug the TV power cord from the power outlet.
2. Unplug any connected devices (DVD, Set-top boxes, etc...)
3. Press and hold the TV power button for five seconds.
4. Plug the TV power cord back into the power outlet and turn on the TV.
5. Open the on-screen menu to confirm that the TV is responding again.
6. Turn off the TV and reconnect the devices.
7. Turn on the TV.

Hope it may help you;

Regards,
VOTIT

Sep 26, 2008 | Pioneer SD-643HD5 64" Rear Projection...

1 Answer

No sound, No video, power LED blinking 3 times


had the same problem with mine and I replaced horizontal deflection transistor located by the high voltage tranformer, its the big transistor by the heatsink, check for any shot and replace if you find problem. worked for me

Apr 15, 2007 | Panasonic PT-53TW53 53" Rear Projection...

6 Answers

Have sound and no picture


HI I HAVE THE SOUND BUT NO PICTURE BAT WHEN I BEND THE POWER BOARD OR PLAY WITH IT LEFT OR RIGHT THSN I GET THE PICTURE

Oct 02, 2006 | Toshiba 50HX70 50" Rear Projection...

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