Question about Philips Magnavox 51MP392H Rear Projection Television
My Magnavox model 51MP392H/17 purchased from wal mart, has the following problem/s: 1) The tv sometimes will not turn off. 2) The tv will turn itself on some time after being turned off. 3) While watching tv the TV will change input selections,IE: if watching AV1 will by itself go to civ. will go from civ to av2 and so on. Not contiuneus but will wait several minutes between changes. 4) While it is acting strange as above any input from the remote will cause the above to happen.IE change volume level the input will advance also. I have taken the back off, and tried to see if anything oviouse is burnt or if any carbon traks are visible but can't find anything visible. I don't have much electronics tranning, but I am aware of the high voltage curcuits that seem to be near the back of the tv. Please help it intend to have the problem fixed through a shop, but I need some info and perhaps a very rough estimate be for hand.
Well I forgot to mention that when I do turn on the TV the button flashes 9 times then pauses for a second and repeats the flash 9 times over again.
Is this a error code for the 51MP392H/17 ?
Posted on Jul 28, 2008
SOURCE: Magnavox 51MP392H/17
yes youre model will need two convergence ICs they are both STK392-120 and you will also need some 6.8 ohm resistors usually two or four resistors will need replacing as well. The site servicemanuals do have all the parts and they do provide free installation instructions with the ICs.
Posted on Sep 03, 2008
SOURCE: 1993 46 inch Magnavox no picture
I posted this earlier, however I believe it applies in this case to:
This can be any number of things, here is a possible listing:
1) No High Voltage (check the IHVT or the trippler)
2) CRT filament transformer winding open (check the windings that supply voltage to the CRT filaments)
3) Video / CRT socket boards bad (highly unlikely but check anyway)
4) High Voltage power supply malfunctioning (related to problem #1)
This listing is a good starting point. I would suggest that you purchase a schematic to aid in testing the voltages mentioned in the 4 steps above. If you have a background in electronics then do the above, if not please ask a qualified TV technician to perform these steps.
I hope this helps,
Posted on Dec 08, 2008
You need a professional.
Your TV has "lost is mind"
Stop using the TV until it is repaired.
Continue to use it and your problems will multiply and grow more expensive.
Call the manufacturer to find you nearest authorized service center.
MR. TV Sales & Service Inc
Milwaukee Wisconsin 53405
Posted on Mar 24, 2009
yes its repairable
its a convergence circuit failure there are a couple ics and most likely some resistors that will need replacing and possibly a pico fuse
est 300 to 340 you mention only red and green though do you not have blue in your picture
id bet the blue is non exsistant and will need a blue liquid kit changed to correct that problem also
you might want to conatact a local servicer and give a model and ask them what they woud do both for then you can make a decision if you want to do it or not
Posted on Oct 31, 2009
The Squeaky sound in a CRT rear projection tv is caused by a faulty high-voltage circuit. The components that can cause this are damaged flyback(most likely case) and/or deflection circuit. How good are your electronics/soldering circuits? Its not a good idea to fiddle with a circuit that generates 30,000V . So I would like to verify whether you have prior experience in working on electronic circuits before I tell you what to do
Posted on Feb 10, 2011
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