Re: Magnavox 42" 42mf521d/37 CHIRPING
Update** The last two diode replacements fully repaired the tv. Thank you for the help and insight.
cola2681
New Member
Last Activity: 01-24-2014, 07:10 PM
Joined: 01-22-2013
Location: Booneville mississippi
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Re: Magnavox 42" 42mf521d/37 CHIRPING
Ok thank you for digikey info. just ordered....now the waiting game.Leave a comment:
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Re: Magnavox 42" 42mf521d/37 CHIRPING
Ok so i removed the diodes from within circut and tested them
diode 6054 = .008 , .008
diode 6055 = .007 , .007
diode 6056 = .460 , no reading
diode 6062 = .474 , no reading
so it appears diode 6054 and 6055 are bad with a part number of
LT6246 P6KE120A
both diodes are the sameLeave a comment:
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Re: Magnavox 42" 42mf521d/37 CHIRPING
What do you mean "they are in circut reading" and what values normally
should i be looking for when testing these diodes.Leave a comment:
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Re: Magnavox 42" 42mf521d/37 CHIRPING
Chassis = L06 ELeave a comment:
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Re: Magnavox 42" 42mf521d/37 CHIRPING
Ok here are the readings with the board disconnected
far left diode = .018 , .019
top diode = .066 , .062
middle bottom diode = .031 , .031
far right diode = .029 , .029
What exactly do you mean chassis number and where is it located?Leave a comment:
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Re: Magnavox 42" 42mf521d/37 CHIRPING
Here is a picture of the power supply. this is my first switch mode power supply
repair so i will probably be a little slow but i am doing as much research as i can on this board....Leave a comment:
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Magnavox 42" 42mf521d/37 CHIRPING
I am attempting to repair a 42mf521d/37 lcd magnavox tv for a friend and also increase my electronics skill level. The tv will not power up and makes a "chirping" coming from the psu. I removed the psu and found 4 bad capacitors.
3 X 1500uF 35 volt
1 X 2200uF 25 volt
replaced all 4 and no luck. I did some more researching and the most likely cause i saw for the chirping was a bad horizontal output transistor or ic
Any help would be very appreciated in this repair or a safe place to or
a replacement board. Board # 715T2243-1
I do have the psu removed...
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