I have a BA01F4f0103 and the inverter transformers run about 4.75 mohm give or take but there is one that measures 4.55 mohm. Would that be a red flag? What is the percent over the others that would make it unacceptable? Thanks a lot. Blinking green light with voltage ( 65volts ) to the inverter.
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Last edited by kevinjo; 01-02-2015, 08:15 PM. -
Re: Sylvania LC-320SL1 - Inverter question
"4.75 mohm" 4.75 milli-Ohms? Please clarify.
Primary or secondary winding?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: Sylvania LC-320SL1 - Inverter question
4.75 Megaohms, secondary. SorryComment
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Re: Sylvania LC-320SL1 - Inverter question
That will be way too high, they are usually around 500~2500 Ohms range depends on the transformer, not in Mega range.
Are you sure you are reading at the correct pins?
"voltage ( 65volts ) to the inverter." Are you talking about the Voltage on that white power connector?
That white connector is the DC input for receiving about 160VDC from the main power supply board feeding this board.Last edited by budm; 01-02-2015, 11:12 PM.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: Sylvania LC-320SL1 - Inverter question
The Lines coming from the filter on the main board. Not directly but in that area. I get no power from the white flat ribbon connector. I suspect the voltage is being terminated for some reason. I am reading the 2 pins on the transformer close to the bulb connector.Comment
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Re: Sylvania LC-320SL1 - Inverter question
Pictures of the whole back side so I can see how all the boards are connected?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: Sylvania LC-320SL1 - Inverter question
The inverter transformers have dual HV windings.Attached Filesif you find these attachements useful please consider making a small donation to the site
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: Sylvania LC-320SL1 - Inverter question
Here is the back side.Comment
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Re: Sylvania LC-320SL1 - Inverter question
See post 7.
I found that pix on SJ site.
I am still trying to understand how you get 65V to the inverter, how do you measure it and what is the Ground ref you were using and at the exact test points?Last edited by budm; 01-03-2015, 02:33 AM.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: Sylvania LC-320SL1 - Inverter question
Next to the filter cap is a white connector. This is 65volts input from the power supply ( DC ).Comment
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Re: Sylvania LC-320SL1 - Inverter question
The windings measurements ( secondary ) per your terminals are :
T1050- .536k
- .534k
T1100- .541k
- .538k
T1150- .541k
- .529k
T1200- .529k
- .530k
Looks like the inverters is not my answer. Looking like a bad main I believe.Comment
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Re: Sylvania LC-320SL1 - Inverter question
Although T1150 seems a bit lobsided?Comment
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Re: Sylvania LC-320SL1 - Inverter question
CORRECTION: Voltage is not 66Volts. It is actually 166volts. Sorry for leaving off the 1.Comment
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Re: Sylvania LC-320SL1 - Inverter question
Seems to be a lot of these popping up, I just got one that will not power on. I havent cracked into yet but once I do I will make a new thread if my affliction is different.Comment
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Re: Sylvania LC-320SL1 - Inverter question
I actually lucked out and had a set in storage that had an upside down screen. I replaced it with this one and that is now working fine. I still need to know what is wrong with this one so I know if I find another screen, can still use the boards. I do have the upside down screen so I can still test things. If you have any ideas..send them. I see these all the time and usually not hard to fix.Comment
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Re: Sylvania LC-320SL1 - Inverter question
Upside down images are strange, I just had a Proscan LED with this issue on a new compatible mainboard.Comment
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Re: Sylvania LC-320SL1 - Inverter question
I finally got around to check the main ( small leads give me problems eyes etc ). The main has nothing except 3.3v. So I think I am right and it is the main. Keep the screen in storage and add the boards ( except main ) into the inventory. Thanks and if I can help you..just let me know. I have a lot of parts.Comment
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