Re: Panasonic TX-40CX400B - 17IPS20 - DULLSCREEN+ON/OFF/ON/OFF fault
EXCELLENT Thank you
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Re: Panasonic TX-40CX400B - 17IPS20 - DULLSCREEN+ON/OFF/ON/OFF fault
When you replace the diode use the same type. That is, if its an ultrafast Schottky diode then replace with likewise.Leave a comment:
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Re: Panasonic TX-40CX400B - 17IPS20 - DULLSCREEN+ON/OFF/ON/OFF fault
Pulled the biggest diode off today and it has gone 0 both ways, in the attached Pic of the 2 diodes.
the transformer in which they are connected is the 30068375 transformer not sure what that does but if its to do with the LED backlight then it would make perfect senseLeave a comment:
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Re: Panasonic TX-40CX400B - 17IPS20 - DULLSCREEN+ON/OFF/ON/OFF fault
Replace the PSU.....Leave a comment:
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Panasonic TX-40CX400B - 17IPS20 - DULLSCREEN+ON/OFF/ON/OFF fault
Hi guys this has just come to me and im not too sure were I should be checking voltages etc.....Vestel board
hahaha
I seem to have a voltage bouncing around but not sure if im checking in the right place see attached photo
the set powers up, the hmdi channel info comes up, then after a couple of minutes it will freeze then switch off and on again, its gradually got worse the more I do it......i.e the screen stayed on longer when it 1st started checking it
there is no signs of burning any where or shorts on the board
I have circle where the voltage is bouncing around, and also were there is a suspicious area in which the diodes read 0 both ways(not removed as of yet though)
wanted to check the voltage properly 1st
MAIN BOARD PINS
1= 23v[25V ON] 7=
2= 8=0
3= [3.26V ON] 9=0
4= [3.26V ON] 10=0
5= 11=12V
6=12V [11.9 ON] 12=12V
the ones that are blank are reading mV and moving around
Now all of a sudden the backlight is flickering a lot, but before I even took the cover off the set it looked very dullAttached Filesif you find these attachements useful please consider making a small donation to the site
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Hello everyone. 😀
As per thread title, this unit has a serious SMPSU fault. It blows F1001, which is a 10A M205 in the phase from the mains input.
Very first thing I tried, was simply replacing the fuse, but the replacement ceramic fuse blew immediately.
Looking at the schematic for this PSU, I then removed what I thought was the next likely candidate: D1001 - the HV main bridge rectifier.
This isolated the fault(no longer blows the main fuse), but does not point me to the actual fault.
There are no devices that have exploded or otherwise show signs... -
I picked up a Panasonic NH-P70G2, though it would apply to the NH-P80G2, NH-P70G1 and NH-P80G1 models as well, as maybe some other models. This one was coming up with a H86 error. After lots of testing and googling it was an error with one of the thermistors in the condenser area.
The attached French service manuals is incorrect, TH11 is gray and is a 95k thermistor and TH12 is black and is a 35k thermistor.
In my case TH12 was bad. I was able to get a 35k thermistor on AliExpress. It's 6mm in diameter.
Unfortunately the whole machine has to come apart to fix it.
I have... -
Hello! yes I know there is already lots of information about this issue. I have a Panasonic TC-P55ST50 that originally displayed an 8-blink error code. Following the troubleshooting flowchart, I ended up replacing the SS board. However, even after replacing it, the issue persists. The TV turns on and stays on without displaying an image, and continuity is confirmed on all connectors. What am I missing here🤔?
Ok Im a mechanical engineer ...but I thought I was able to follow a rather simple flowchart for electric troubleshooting 😂.
TV Model: Panasonic TC-P55ST50
...11-20-2024, 08:52 PM -
Hello,
I bought a Panasonic 40" TX-40AX630B TV from Richer Sounds 7 years ago and it has developed a strange fault. If I attempt to press any button on the back of the TV or remote control (access media features etc.) the TV locks up for a few minutes or longer and sometimes goes blank. However, if I turn the TV off and on again and quickly select a channel it will work fine all day long, as long as I don't touch the remote or controls on the back of the TV.
I've tried changing batteries on the remote, changing plug sockets and doing other things such as a... -
After getting the backlights up and running a second fault has emerged on this TV. I was going accept defeat and move on but thought I'd have a quick look at it in case it was something simple. The right side of the display exhibits a panel brightness (not backlight brightness) pulse every 2-3 seconds in a stable timing.
I poked about on the TCON test points and found one voltage that is fluctuating in the same pattern. VGH-ODD (Pin 47 of U10) is sitting at ~-6.5v then goes up to ~28v when the brightness pulses then goes back down to ~-6.5v again in a repeating pattern.
...03-22-2023, 02:58 AM
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