Re: Panasonic TX-37LX85P blink 3 times
Is there an error output on the inverter; are the pins marked at all?
Is there an error output on the inverter; are the pins marked at all?
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Re: Panasonic TX-37LX85P blink 3 times
should i check voltages on output in the picture?? I think this is high voltage, just to be sure? i see someone replaced the 3 capacitorAttached Files...the quieter you become the more you are able to hear...Comment
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Re: Panasonic TX-37LX85P blink 3 times
Don't attempt to measure the high voltage output with meter - over 3000V present on some LCD TVs.
How is the soldering on those caps? Try cleaning up flux.
I see at least one missing - little SMD C6?
I am trying to understand how the inverter is wired up to the main board. Looks like it goes through A13 perhaps?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Panasonic TX-37LX85P blink 3 times
the solder is OK, i now cleaned it. Yes i see that someone is try to "repair" TV.
Yes it is wired with the A board with A13, and with the power board with the P5...the quieter you become the more you are able to hear...Comment
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Re: Panasonic TX-37LX85P blink 3 times
On A13, there is a pin #4 called "INV_SOS". What does this measure? I think it should be low if OK, high if bad. Also, check INV_ON and INV_VCC; pins 2 and 1 respectively.
Looking at the design of the board, it sends a 5V/12V power rail to the inverter for its logic power, alongside the 24V for the main power supply. I'm working right now on the assumption the power supply failed and sent 17V down the 9V line... this might have damaged the A board (causing your original 3 blinks)... then I think it may have reached the inverter VCC
hopefully it's something simple like a blown fuse.
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Re: Panasonic TX-37LX85P blink 3 times
#4 = 3.27V
#1 goes to 12V but when clicks then 0V, then again 12V -> click -> 0V
#2 = 0V...the quieter you become the more you are able to hear...Comment
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Re: Panasonic TX-37LX85P blink 3 times
OK, Vcc is OK, but the SOS signal should be a LOW. If you force it low (to pin 6 is fine) using 100~470 ohm resistor, does the TV do a blink code with inverter installed?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Panasonic TX-37LX85P blink 3 times
I used 100oHm resistor, but no change. Still blinking green LED, and clicking sound. I notice that #1 is not used (there is no wire)Attached Files...the quieter you become the more you are able to hear...Comment
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Re: Panasonic TX-37LX85P blink 3 times
What does INV_SOS measure on the A board side when you do this?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Panasonic TX-37LX85P blink 3 times
is there difference if i connect resistor on A board or wire or inverter board. I think it is only important to get LOW signal. And what is LOW? is it ok if there is 1V or should be lower?...the quieter you become the more you are able to hear...Comment
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Re: Panasonic TX-37LX85P blink 3 times
At either end is fine, we are trying to make it less than 0.8V which is the guaranteed low threshold of the 3.3V logic.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Panasonic TX-37LX85P blink 3 times
Your current LED indication sounds similar to this little LCD I fixed.
https://www.badcaps.net/forum/showthread.php?t=23136
The PSU/inverter was all one unit and it had a shorted P channel H-FET which was situated on my set right before the inverters. On that one disconnecting the backlight allowed the green LED go solid for a moment then SOS1. The TV had already been tuned in so when an antenna was coinnected I did momentarily get sound from a channel.
You mentioned TPC8105 which is a P-channel H-FET. That's what they look like (8pins)Comment
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Re: Panasonic TX-37LX85P blink 3 times
i got 0V on #4 pin when i use the 100ohm resistor, should i try with lower resistor?...the quieter you become the more you are able to hear...Comment
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Re: Panasonic TX-37LX85P blink 3 times
0V is fine, but since you've now disabled the error signal and you still get the blinking green I'd have a look at tw2005's advice.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Panasonic TX-37LX85P blink 3 times
i measured the voltages, please have a look at them. I think that something is wrong here.Attached Files...the quieter you become the more you are able to hear...Comment
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Re: Panasonic TX-37LX85P blink 3 times
The 3~5V readings do not look good to me, something may be wrong there. With the board powered off, what resistance do you measure between the tab and each of the two pins? It should be >10kohm.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Panasonic TX-37LX85P blink 3 times
by the tab you mean the plate? (screw) I measured, on one side is 29kOhm and other is 124kOhm (i measure the regulator pins that is 3.62V on picture)...the quieter you become the more you are able to hear...Comment
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Re: Panasonic TX-37LX85P blink 3 times
What is the part # on it?
Yes tab = metal fin/plate at top of device.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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Re: Panasonic TX-37LX85P blink 3 times
1h45sf
fdd
8447l...the quieter you become the more you are able to hear...Comment
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Re: Panasonic TX-37LX85P blink 3 times
All of them?
https://cdn.badcaps-static.com/pdfs/...5f51094b3a.pdfPlease do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
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I recently got my hands on a 60" Panasonic P60ZT60 plasma tv (european model) that has some strange issues along with an 8 blink code.
It know this tv is getting old but it was once considered one of the best plasmas ever made, and i think it is still holds on to that even by todays standards.
So, long story short. When i first got the tv it had a very bright washed out picture with very raised blacks in all picture modes and i couldn't find the cause in the picture setting menus.
After doing a factory reset this problem was gone and the picture was back to...01-06-2025, 06:02 AM -
Hi everyone,
I'm new here and trying to repair my Panasonic TX-P50V10E plasma TV, which is currently showing the 6 red blink error code.
Just for context: I'm used to building PCs and installing modchips in old consoles, but this is my first time trying to fix a TV. I'm French, and while my English is okay, I'm using ChatGPT to help translate and clarify my messages as much as possible — so please forgive any odd phrasing.
I'm also not very experienced with using a multimeter, but I'm very motivated and ready to follow instructions carefully and report... -
I am sitting with a very similar issue.
Basically, had a probook that worked, gave it to someone, they returned it DOA. what the heck happened, I have no idea.
Caps and num lock blink 4 times, as per HP, thats a board failure. I am very new to this, so perhaps I should be posting a new thread?
Anyway, I resoldered the bios chip on after trying EVERYTHING else including reseating ram, cpu etc.
Multimeter shows 19.5V on power, so I presume thats correct. Fan spins, no display. No post. Bios chip looks good from what I can tell just not sure how... -
Greetings from SoCal
I am new to this forum but not new to forum world. I come from Automotive end of side which is my main passion in life. Give the automotive nature, I love fixing and restoring things and I have in the past fixed many simple electronics, soldering, etc.. but this is a bit more involved so I found this forum, and I am very glad I did.
I picked up a Panasonic TC-P60VT60 with the 7 BLINK error.
Upon removing the back plate I found spider webs, dead spiders, and an amazing amount of dust. I did my best to clean the surface of the boards with a portable vacuum... -
Hi,
I have this tv that works for about 15 to 20 minutes and then turns off, leaving the led to blink 8 times, this via HDMI, because I can't get into the tuning menu, it says Function unavailable.
Through the manual, I was able to verify that it could be a software problem, but unfortunately the tv already has the latest software and that's why it won't let me update.
Does anyone know of a way to reinstall the software?
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