Question about Philips Magnavox 51MP392H Rear Projection Television
Ok guys, im new here!
I apoligize if I am too specific here, but I like to make sure everyone has all the information needed to diagnose my problem.
Ok, boys- first things first - I am perfectly comfortable soldering (I have assembled circuit boards for the last 10 years) , and I know some basics of testing with a multimeter, basics of TV's, and have played with them in the past - even repaired a few simple ones in the past! Not bad for a girl, huh?
I have a Magnavox 51MP392H/17. It worked fine until one night where the picture just shut off! The sound kept going fine, just no picture! I downloaded the service manual and started on this adventure:
I pulled the back of the set to have a look at it. I have looked at all of the capacitors, none seem swollen, There are no visibly burned components or circuit traces, and I made sure to check all of the fuses on the boards - even the weird little black round ones... all tested good.
I removed all the convergence resistors and checked them with my meter- they all ohm out fine! Just on a gamble, I ordered some Sanyo brand STK392-120's and installed them....still no change!
When I turn the set ON i hear the power relay click, then the high pitched sound (blip) of the flyback transformer - then I get audio from the signal but no picture. I have also noticed that the base of all 3 CRT's glows red when on. Does this mean the FBT is good?
Sometimes when I try to turn it on, it will click on, you will hear the FBT, then the whole set will turn off for one second, and then back on, and you will hear the FBT again, but no picture still.
I have felt the heatsink on the Horizontal Output Transistor and it is warm, as is the heatsink for the convergence I.C's - I am guessing the FBT or HOT is bad, but I dont know how to test either one of them.
Any advice for an amature do-it-yourselfer ? I miss my tv, and I still think it looks better than an LCD! I know not alot of women do this sort of thing, but I like to think I am a bit different, hehe. Dont be afraid to talk techie with me.. I know a little, but I am also sure you all could probably confuse me if you wanted to, so keep that in mind!
If heat sinks on hori/and convergence are running warm then it means sweep is working ,You have a bad Flyback transfomer HVG part number 3122 268 32942 Phillips FBT
Posted on Dec 18, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Aug 16, 2010 | Mitsubishi WD-52525 52" Rear Projection...
May 27, 2009 | Mitsubishi VS-6041 60" Rear Projection...
Jan 11, 2009 | Mitsubishi VS-45607 45" Rear Projection...
Jul 23, 2008 | Televison & Video
Apr 05, 2008 | RCA D61W20 61" Rear Projection Television
Dec 28, 2007 | Hitachi 46F500 46" Rear Projection...
Oct 06, 2007 | RCA HD52W56 52" Rear Projection HDTV
228 people viewed this question
Usually answered in minutes!