About 2 years ago, I did the master/inverter repair when BD9897FS-E2 burned through. I also went ahead and did the LG Philips modification to "fix" the problem. TV has been working well since, but recently will turn itself off after about 5 minutes of being on. The power button or remote will not turn it back on, BUT, if I plug and unplug the tv from the wall, it will re-start. I should be able to crack it open tonight and assess the boards for bad caps, but hope that the plug/unplug fix is enough for someone to nail it sight unseen.
VO42L Turns OFF After a Few Minutes...
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Re: VO42L Turns OFF After a Few Minutes...
Hmm....
This is a VERY old set! It could well be the CCFL tubes themselves. Ive had both a LG and a Samsung fail in this way--because the CCFL's were stuffed....TELEFIX
How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
http://www.irf.com/technical-info/appnotes/an-1088.pdf
PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM! -
Re: VO42L Turns OFF After a Few Minutes...
You need to take DCV reading at the pins of the connector of the power supply board that goes to the main board, and also the connector of the power supply board that goes to the inverter boards, take the reading when TV is off, on, and after it turns off by itself.
Make sure to put the pin numbers, pin names, then the Voltage readings so we do not have to guess what the pins are for.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: VO42L Turns OFF After a Few Minutes...
Will do. After plugging and unplugging the unit and not turning it on, the standby light glows yellow. Once on, it turns white and then cuts off completely when the TV shuts itself off. It appears the time that the TV is on is getting shorter and shorter...Comment
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Re: VO42L Turns OFF After a Few Minutes...
Power Board is FSP-254-3M01
Motherboard is 0171-2272-2604
Power readings to MB:
TV on Standby: VIZIO Logo is Orange
+5V is on, all other voltages are zero.
TV is ON: VIZIO Logo is White
B1: 5.08V
A1: 3.35V
5V SB: 5.22V
12V: 12.29V
PSON: 2.7V
Voltages After Cut Off:
All voltages zero and VIZIO light is off.
24.2V to inverter boards when on, zero when off.
With a DVD player connected to HDMI, seems to die within a few minutes. Without one connected, lasts alot longer, sometimes does not cut off at all.
395V at the large filter cap.
All caps on PS and MB pass the eye test, all flat tops.
The toroid near the 3 blue film caps is buzzing (or something else nearby).Last edited by smata67; 06-10-2016, 05:05 PM.Comment
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Re: VO42L Turns OFF After a Few Minutes...
Is the one capacitor behind the connector (PS_On) under the heatsink domed or is it just the photo?Willing to help but I'm no expert.Comment
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Re: VO42L Turns OFF After a Few Minutes...
So I have a mainboard on order and am also going to go ahead and do some preventative work on the ps board. There are vendors on Ebay with "kits" for the FSP-254-3M01. Does anyone know what components are in these kits? I would rather source directly from mouser than get generics, but I will if I have to.Comment
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