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.
Sylvania LC-320SL1 - Inverter question
Collapse
X
-
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
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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.
Will do, thanks for the offer! I am going to try and tear into it tomorrow.Comment
Related Topics
Collapse
-
by x_orange90_xI just got this tv today and it appeared to have no backlight on. After taking off the rear cover and checking again in the dark I can see that MAYBE one quadrant is lit.. But still it's quite dim. I was going to check the LEDs with my tester, and I found LED 1 and LED 2 + pins on the wire from the inverter, but I couldn't identify a ground. Nonetheless I tried using a mounting screw on the inverter board and also the chassis as ground but regardless my tester reads 300 which is what it reads when there is no voltage draw.
I don't know how exactly to test the inverter itself. Is it... -
by GentianI have a tripp-lite aspint 3636vr inverter charger which blow some of mosfet transistors. I replaced them repaired also the driver circuit and tested but the mosfets burn again.
It work very well as inverter and also as charger if I let the rear switch in auto mode (inverter) and charger only(charging) but in auto when I connect the feed line 220V AC first time it pass ok to line and start charging the batteries but when I remove the feed line it pass to inverter mode and if I do it again the second time when passing from charging to inverter the Main transformer start making a...03-06-2023, 07:07 AM -
by valvashonFor some reason I'm just not going to let this 19" TV defeat me. I guess because I have a schematic to work from I feel like I'm oh so close.
History- while adding a turn-on circuit I let a small screw roll under the power board. Worked through all of that circuitry, probably replacing a MOSFET and PWM controller that were not bad but I was following the service manual. Finally figured out that the power supply is in working order when the inverter section (for the backlights) is disconnected. When the +12 supply to the inverter is disconnected the +12 and +5 will come up...1 Photo -
by eccerr0rIf I had a solar fed grid tie inverter (GTI), a modified sine wave inverter, and a power outage occurred, what would happen if you disconnected mains, backfed the modified sinewave inverter (MSI) into house power, and hooked up the GTI to the output of the MSI, would it work?
Next thing is trying to charge the batteries using solar power, but that's another issue ... -
by caseyjay_48I am currently on a troubleshoot of 46” Sony KDL-46BX450 tv. I came back from Washington to Texas on medical emergency and had to leave all my tools up there. All I have is a couple of screwdrivers and a dvm. I wish to ask the community a troubleshooting question. Please forgive stupid questions as meds I am taking produce brain fog.
I have well maintained Sony KDL-46BX450. It went black one day. After turn-on, I get solid green light and Sony logo in screen center for about 1-2 seconds, then black. No blinking LEDs, no hissing. Flashlight test shows screen characters dimly viewable,... - Loading...
- No more items.
Comment