Re: Vizio VP422 won't turn on.
I still do not know which one that show <1 Ohm reading if they are shorted that you are referring to.
I still do not know which one that show <1 Ohm reading if they are shorted that you are referring to.
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Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: Vizio VP422 won't turn on.
Do I measure between the 2 outside legs or a middle and outside?Comment
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Re: Vizio VP422 won't turn on.
Are we talking about MOSFET, right?
Look up the spec sheet of the MOSFET to locate Pin 'S (Source)' and pin 'D (Drain)'.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Vizio VP422 won't turn on.
The number on the part is sd20n60. Middle leg is labeled D and the one to the right of it is labeled S.Comment
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Willing to help but I'm no expert.Comment
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Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: Vizio VP422 won't turn on.
By the way the fuse is t4ah250vp. Seems to not be available from Amazon UK. Or a Chinese site I'm not sure I trust.Comment
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Re: Vizio VP422 won't turn on.
This is the link to shopjimmy for sd20n60 http://www.shopjimmy.com/catalogsear...ult/?q=sd20n60Comment
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Re: Vizio VP422 won't turn on.
The mosfet on Q8101 reads 1.07 Mohm, Q81002 reads 1.08 Mohm.
Q8201 reads 3.64 Mohm and Q8202 reads 3.63 Mohm.
I don't know if that means anything.
I ordered 10 fuses. When they get here I can apply power to it and have some to spare.Comment
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Re: Vizio VP422 won't turn on.
There's a number of Chinese companies that sell cheap Mosfet testers that would be useful for you in repairing TV's.
http://www.ebay.co.uk/itm/LCD-Transi...cAAOSw~OVWz7-B
The ESR works but I don't rely on it having a Dick Smith unit that is a must for checking capacitors.Willing to help but I'm no expert.Comment
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Re: Vizio VP422 won't turn on.
The diode is internal to the mosfet as shown in the pdf post #45 for the sd20n60
Looking at the front of the mosfet Pin 1 = Left (Gate), Pin 2 = Middle(Drain) , Pin 3 = Right (Source)Attached FilesWilling to help but I'm no expert.Comment
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Re: Vizio VP422 won't turn on.
So check between 2 and 3 of the diode?
No beeping.Comment
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Re: Vizio VP422 won't turn on.
Yes there is an internal diode in the 20N60 and is between pins 2 and 3. What readings are the getting both ways using your meter set to diode test.Willing to help but I'm no expert.Comment
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Re: Vizio VP422 won't turn on.
What are the part numbers for:The mosfet on Q8101 reads 1.07 Mohm, Q81002 reads 1.08 Mohm.
Q8201 reads 3.64 Mohm and Q8202 reads 3.63 Mohm.
I don't know if that means anything.
Q8101 = ?
Q81002 = ?
Q8201 = ?
Q8202 = ?Willing to help but I'm no expert.Comment
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Re: Vizio VP422 won't turn on.
If the meter is reading OL in both directions then it would indicate an open circuit diode within the mosfet but I'll wait to see what the component identification numbers listed above are first before reaching a definate conclusion.Willing to help but I'm no expert.Comment
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