Question about Philips Magnavox 51MP392H Rear Projection Television

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The tv is a Magnavox 51MP392H/17 and has sound but no picture. Any ideas?

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TV is in high voltage shutdown protection mode. Check to see if Horizontal output transistor is shorted or open. If not then resolder all solder joints on HV transformer. If this does not fix it then you will need to do voltage checks off of H.O.T. and then possibly a bad HV transformer.

Posted on May 01, 2010

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Posted on Jan 02, 2017

Slinteriors
  • 8617 Answers

SOURCE: 51mp392h/17 model number magnavox

try resoldering the vertical output IC. That may be the problem bad solder has been known to cause that symptom in the chassis

Posted on Mar 20, 2008

Shuttle83
  • 1139 Answers

SOURCE: Magnavox 51MP392H/17 No pic only sound

Hello winwithrose,

The popping sound may have been a capacitor. The chance are the capacitor is in the HV section of the TV set and is part of the supply to the Horizontal section of the TV. First if you do not have electronics experience I would suggest you take the TV to a qualified TV repair shop. OK now if you have electronics experience I would say to unplug the TV, open the set up and do a physical inspection of the TV you will be looking for a capacitor that has exploded; if you find one look at the schematic for the TV and find its value. Then do so checks to find out why did the capacitor explode. Most likely the capacitor exploded because of wear and tear, but it always pays to check. Replace the capacitor with one of the same value and then turn the TV on, use your voltmeter to measure the voltage across the capacitor to make sure its the same or close to the value on the schematic.

These are the basics of what to do

I hope this helps

Thank you,

Shuttle83

Posted on Sep 21, 2008

  • 597 Answers

SOURCE: Magnavox 51MP392H Rear Projection Television: philips 55" projection tv has no sound or picture...

power module

Posted on May 20, 2010

  • 1516 Answers

SOURCE: Magnavox Rear Projection 51MP392H/17 has ghosting

If this happened suddenly and the red and green images are bowed in at the center of the top, bottom and both sides, one of the convergence amplifier IC's has failed. The part number is STK392-120. Make sure it is a genuine Sanyo brand replacement; there are a number of cheap imitations out there that do not last. Generally they cost less than $30 each.

Note: there are two of these in each TV. They are notorious for having a high failure rate, so I usually replace both. (FYI: each chip has three amplifiers. Each color gets two amplifiers, so one color uses an amplifier on each chip. That's why we usually see at least two colors go out of whack when this problem happens.)

I assume you have already tried a different video source (DVD, VCR, etc.) to rule out input signal defects. If the problem arose right after the set was moved, either the optical alignment was disturbed or (less likely) there is a stray magnetic field near the set that is causing problems (magnetron from a microwave oven?). There is a procedure (sometimes provided in the owner's manual) for adjusting convergence using the remote control that can fix minor alignment problems. If you want to gamble it is not a hardware failure, try it first along one edge of the picture.

If you cannot shift the red or green dots in the convergence pattern, stop immediately, and make a note of where and in what direction you tried to move the dots. Inability to converge the dots is a strong indication the convergence amplifiers are bad (that is their job - to keep the colors lined up with each other). You will need to undo any adjustment attempts after you replace the convergence chips and any fuses or resistors that got burned when they went out, so don't make too much extra work for yourself or your service tech.

Posted on Oct 27, 2010

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1 Answer

No Sound, No Picture on Magnavox 51MP392H/17


If you hear a constant clicking or chirping sound get the chirping TV repair kit from www.TvRepairKits.com

If you have no video - but have audio - its most likey the HVG.

Note: When the video goes out sometimes its hard to tell if you have audio becuase you can't see the screen to change to the correct channel.

May 08, 2009 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

The screen is starting to have red and green blurring


sounds like the coolant if it appears as halos. If it appears like a 3D picture its the convergence ICs.

Jan 30, 2009 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

I have a Magnovox HD TV Progressive Scan (Floor Model) TV


You can find a replacement Philips/Magnavox fresnel screen, in stock, for this model (51MP392H/17) at this following link from a major parts distributor:

Philips / Magnavox 51MP392H Replacement Part Fresnel Screen

And here's a link for the Lenticular (middle) Screen, if needed:

Philips / Magnavox 51MP392H Replacement Part Lenticular Screen

Jan 16, 2009 | Philips Magnavox 9P6034C 60" Rear...

1 Answer

Magnavox


Need more info, does it click on and off, make any noises, was the picture going blurry, did you just move it, was in built into a wall where it wouldn't get air to cool???

Here is what I know about the 51mp392h this is a general post below I used for some other peoples fixes without more info on yours I suggest reading thru the below and links and add more info to your post so we can trouble shoot it.
51MP392H/17

Actually I have this TV and you need 2 Convergence IC's STK392-120's (120's and 150's will work) of course order 2 of the same type I'm using replacement 150's they allow for a little higher heat and were cheaper ALSO you need to replace the 12 resistors with 6.8 ohm metal film resistors, make sure they are metal film! don’t skimp out here I did and then they blew and fried my IC's and I had to replace everything again!

Great reference link that I posted pictures on, check out page 3
http://www.techlore.com/forum/thread/16736/Magnavox-51MP392H-17-51-quot--TV-has-double-vision/

Where I got all my parts that worked:
Suburban Electronics http://www.suburban-elect.com/

Manual Library you should find all you need here:
http://www.techlore.com/group/2/list_downloads



What you need:
(2) STK392-120 OR STK392-150 IC chips
(12) 6.8 Ohm Metal Film resistors
set of star screw drivers
15 watt pencil solder pencil, DO NOT use a high watt iron you will fry the surface mounted item.
good leaded solder, and flux


BTW if you don’t plan on trying this and are going to throw out the TV, I still need a IC convergence board for a 51MP392H/17 TV I'm fixing, I'm willing to pay S/H and buy your IC board that’s not been tampered with. Edwinkraus@hotmail.com

Nov 16, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

No Picture No Sound Magnavox Rear Projection Television


51MP392H/17

Actually I have this TV and you need 2 Convergence IC's STK392-120's (120's and 150's will work) of course order 2 of the same type I'm using replacement 150's they allow for a little higher heat and were cheaper ALSO you need to replace the 12 resistors with 6.8 ohm metal film resistors, make sure they are metal film! don’t skimp out here I did and then they blew and fried my IC's and I had to replace everything again!

Great reference link that I posted pictures on, check out page 3
http://www.techlore.com/forum/thread/16736/Magnavox-51MP392H-17-51-quot--TV-has-double-vision/

Where I got all my parts that worked:
Suburban Electronics http://www.suburban-elect.com/

Manual Library you should find all you need here:
http://www.techlore.com/group/2/list_downloads



What you need:
(2) STK392-120 OR STK392-150 IC chips
(12) 6.8 Ohm Metal Film resistors
set of star screw drivers
15 watt pencil solder pencil, DO NOT use a high watt iron you will fry the surface mounted item.
good leaded solder, and flux


BTW if you don’t plan on trying this and are going to throw out the TV, I still need a IC convergence board for a 51MP392H/17 TV I'm fixing, I'm willing to pay S/H and buy your IC board that’s not been tampered with. Edwinkraus@hotmail.com

Nov 11, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Magnavox 51MP392H/17 No pic only sound


Hello winwithrose,

The popping sound may have been a capacitor. The chance are the capacitor is in the HV section of the TV set and is part of the supply to the Horizontal section of the TV. First if you do not have electronics experience I would suggest you take the TV to a qualified TV repair shop. OK now if you have electronics experience I would say to unplug the TV, open the set up and do a physical inspection of the TV you will be looking for a capacitor that has exploded; if you find one look at the schematic for the TV and find its value. Then do so checks to find out why did the capacitor explode. Most likely the capacitor exploded because of wear and tear, but it always pays to check. Replace the capacitor with one of the same value and then turn the TV on, use your voltmeter to measure the voltage across the capacitor to make sure its the same or close to the value on the schematic.

These are the basics of what to do

I hope this helps

Thank you,

Shuttle83

Sep 02, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

No picture


Hello susbudi and Jazz617,

I would suggest do a check on the voltage from the IHVT to the High Voltage multiplier.
This will determine if this is a HV problem or not. If it is not It may be a video delivery problem which would have similar results. In any event both of these tasks I would suggest be preformed by a qualified TV repair technician.

I hope this helps,

Thank You,

Shuttle83

Jul 18, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Magnavox 51mp392H/17 convergetnt problems


When I turn on my magnavox 51mp392h/17 the sound and picture works but there is a sizzling sound coming from inside of the tv I looked and the sound is coming from what looks like a coil it has 4 lines coming from it 3 of which go to the color projectors and one to what looks like a transformer. Can you help me out?

Jun 06, 2008 | Televison & Video

1 Answer

Tv has soun but no picture


51MP392H/17

Actually I have this TV and you need 2 Convergence IC's STK392-120's (120's and 150's will work) of course order 2 of the same type I'm using replacement 150's they allow for a little higher heat and were cheaper ALSO you need to replace the 12 resistors with 6.8 ohm metal film resistors, make sure they are metal film! don’t skimp out here I did and then they blew and fried my IC's and I had to replace everything again!

Great reference link that I posted
pictures on, check out page 3
http://www.techlore.com/forum/thread/16736/Magnavox-51MP392H-17-51-quot--TV-has-double-vision/

Where I got my parts that worked:
Suburban Electronics
http://www.suburban-elect.com/
Manual Library you should find all you need here:
http://www.techlore.com/group/2/list_downloads



What you need:
(2) STK392-120 OR STK392-150 IC
chips
(12) 6.8 Ohm Metal Film resistors
set of star screw drivers
15 watt pencil solder pencil, DO NOT use a high watt iron you will fry the surface mounted item.
good leaded solder, and flux


BTW if you don’t plan on trying this and are going to throw out the TV, I still need a IC convergence board for a 51MP392H/17 TV I'm fixing, I'm willing to pay S/H and buy your IC board that’s not been tampered with.
Edwinkraus@hotmail.com

Nov 05, 2007 | Philips Magnavox 51MP392H Rear Projection...

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