Re: Project 2: Panasonic TH-42PW4UZ green light on, nothing on screen
Are you lifting a leg of those FETs off of the board before testing?
Are you lifting a leg of those FETs off of the board before testing?
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Re: Project 2: Panasonic TH-42PW4UZ green light on, nothing on screen
Just now pulled one off to test it furtherComment
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Re: Project 2: Panasonic TH-42PW4UZ green light on, nothing on screen
makes a bit more sense now
(again it's all a learning process) with them off the board and explains why I wasn't getting what I should have when reading on testing.
When I pulled the (for the heck of it one of the 2sk2993's) FET off (meter in diode mode)
Black on drain red on source 453 reading
black on drain red on gate OL hold for a second or two, move red back to source not removing black off drain you see the reading raise up slower back to 453 meaning it closed the gate correct?
so should I pull all of the 2sk2993's off to test them? (going with tom's suggestion of those typically going bad)Comment
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Re: Project 2: Panasonic TH-42PW4UZ green light on, nothing on screen
To tell the truth, randtek and Tom have way more experience than I do. If you search my posts you will see where I fixed a th-42pz77u with a bad FET.Comment
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Re: Project 2: Panasonic TH-42PW4UZ green light on, nothing on screen
lifted both legs (source and gate) and tested, each one appears to be good
Testing used:
meter set to diode
Black on Drain at all times
put red on source get reading (all about 453) the put red on gate all read OL, put red back on source hear tone reading goes up showing gate closed and back to 453 or about that.
tested the FS7VS 14a as well each showed ok with the above testing (assuming that testing was correct.Comment
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Re: Project 2: Panasonic TH-42PW4UZ green light on, nothing on screen
Walked away for a bit to try and clear my head.
One off thing I noticed, I said earlier that the sc board led would not light up, but oddly when I went to take that board out for testing and removed the connector that supplies the vsus and vbk the led would light for a moment, plug back in it would light briefly again...
Anyway went back on the service manual and started looking and missed one point asking me to check voltages on the dboard. On connector d6 pin 2 and 3 I should be getting 3.3V but I am only getting 1.8V
But it doesn't say much past that such as where the 3.3v is supposed to be coming from.
Trying to trace it out now and figure it outComment
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Re: Project 2: Panasonic TH-42PW4UZ green light on, nothing on screen
That LED lights up when the ERC circuit is working. The ERC circuit should develop approximately 65 to 100V across those red capacitors on the SC board.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Hi
Im hoping someone might be able to give me some idea of what may be wrong with my Monitor Audio RSW12 Sub.
Ive owned it since new in around 2002, so would really like to keep it running if I can, it was the first ‘decent' bit of audio equipment I ever purchased and is a little sentimental.
The issue I had was that it would power up with the red light, but sometimes the green light would not come on and I would get no bass from it. If the green light did come on though, I would get sound out of it.
I have already tried replacing all of the... -
Hi
Im hoping someone might be able to give me some idea of what may be wrong with my Monitor Audio RSW12 Sub.
Ive owned it since new in around 2002, so would really like to keep it running if I can, it was the first ‘decent' bit of audio equipment I ever purchased and is a little sentimental.
The issue I had was that it would power up with the red light, but sometimes the green light would not come on and I would get no bass from it. If the green light did come on though, I would get sound out of it.
I have already tried replacing all of the... -
Hi
I have an 820-2610-A motherboard that has no green light.
I have noticed is when I do a SMC reset the light on the Magsafe blinks.
From My understanding, the sys onewire circuit is responsible for the green light on the magsafe
The sys onewire circuit on this model and others is more involved
I was hoping if anyone knows about this and how it works, can reply and let me know
I know this is an old model but I am sure there are people who still works on these or knows about them
I get 1.1v on the C7771 capacitor and will replace... -
Hey everyone!
I've gotten this TV for free, neither have it seen a TV repair man, neither have it been opened before.
This post describes my entire troubleshooting process of this TV.
When I turn it on using the ON/OFF switch at the side of the TV, the light rapidly flashes green, then it stays on, but it does not react to any of the remote buttons, side buttons, and doesn't play audio.
I've taken the unit apart, and I've started to check some voltages:
- On the P11 connector, there is 15V DC only for a brief moment, then it goes
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i have macbook a1466 board id 820-00165 with power fan spin green to orange light not booting no image or light i tried to fix its leak chip number U1930 but sad it has been damage due of corrosion here i attach the image of board. possible there is a jumper ways for it can't find parts for it to buy.
in first image there is 0v out for lcd
https://ibb.co/5XppmpkH
in 2nd image U1930 chip is damage is there any jumper solution or parts can be compatible for it
https://ibb.co/fdJkbJs8
Comment