Sylvania lc320sl1
I believe the tv has two transistors (k2417) that are bad. I would just like you guys to let me know if I'm correct in this. I have checked both transistors in ohms and diode mode, and from the drain to source I get around 2.437 ohms and when I come back to source after touching the gate there is absolutely no change. It does the same in diode mode and I believe after touching the gate and going back to the source it's supposed to go down significantly. What do you guys think?
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Re: Sylvania lc320sl1
I can't add anything about the transistors. What is the issue with the tv? -
Re: Sylvania lc320sl1
Did you test them out off the board?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 lc320sl1
Yes I tested them out of the board. These transistors are from the backlight inverter. The TV does not turn on at all. I ordered the power supply and it still did not turn on at all so I decided to check all the transistors on the backlight inverter and those two give me the readings I mentioned.Comment
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Re: Sylvania lc320sl1
Can we see the picture of the boards?
Not sure if this service manual has all the ifo:
http://elektrotanya.com/?q=showresul...oria=&kat2=allLast edited by budm; 04-03-2013, 04:01 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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I am having some trouble with troubleshooting a Asus X532FL rev 2.0 motherboard, which does not power on. So at the first MOSFET, I am getting 19V at the drain, and then 3.2V on both gate and source (compared with ground). Of course, the 2nd MOSFET's source will have 3.2v at source.
First MOSFET is a QM3056M6 and 2nd MOSFET is a QM0930M3
I already checked first MOSFET and source and gate are not shorted (drain with source not shorted either). Also I have 1.7V at the LDO rail (measured at the keyboard connector, as the power button is on the keyboard).
First... -
Good day.
I'm currently on a vacation and a friend from the camp site asked me to check why his camper power supply does not charge the batteries when hooked to the mains.
The PSU is cramer and from what I've found the same mainboard is used in both cbc-b7 and bcc-b7. The control module/interface panel is Cramer D-5750.
So what I've found so far - the transformer seems to be working fine and the board has no visually damaged components. I tested most of the diodes and transistors with a multimeter (the only tool I got here) and they read fine.
The two thyristors have been... -
Hi:
I am trying to repair this amplifier that I've bought as faulty. I've found some transistors damaged, the ones where I am drawing a red circle.
With the final transistors not yet installed (the expensive ones), I've started to measure some voltages:
Where I am supposed to have 1.12V (base Q524/Q523) I am reading -42V..................both channels don't seem ok.
Where I am supposed to have -1.12V (base Q526/Q525) I am reading -44V..................both channels don't seem ok.
I removed and tested Q514,Q516 & Q513,Q515 but the analyzer... -
I had a Sundown SFB-8000D amp come into the shop yesterday that wasn't giving any output. The guy who brought it in said he bought it off some crack head on Facebook marketplace for a good price, but bought it knowing it was broken. Apparently the original owner was cutting out the transistors to the right of the ones pictured whenever one would blow and take the output out. Best I can figure he also cut the legs on the S5 and S6 ic's as well and soldered them back together.
My problem is Sundown decided in the factory to remove the original markings on the IC's and now I can't figure... -
Welcome badcaps, repairing a Crosshair 15, in need of transistor specifics. Received a broken laptop that's was perfect for repair, threw away the looser transistors in a haste... Should and could have salvaged them.
In any case, I will be posting all my discoveries to this forum as a thanks in advance. Thanks in advance lol.
P.S. If anyone is familiar with such things, as in, If anyone knows that MSI uses one or one of a few types of transistors when marked with a number please let me know how I can find more specifics before I start throwing hail marys.
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