Thank you,
I replaced R508 (5.6kohm) with a 8kOhm resistor.
Current draw dropped from around 900mA to 700mA....
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
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Turns out you guys were right about the backlight.
I ditched my BL tester and used my bech powersupply with 20V/0.60A.
Out of the three LED stripes the middle one had a faulty LED which only showed it's fault with the lab PSU, not with the tester.
Now I fixed the BL, but I wonder if I could increase the longevity of the LEDs bz decreaseing the current it supplyied by the TV board.
I'm not sure about which resistors should I remove. I cannot measure voltage on R525/8/6/4, so i don't think they are part of the backlight circuit.
What do you...
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i measure 12v on pin 16.
[ATTACH=JSON]{"data-align":"none","data-size":"medium","title":"image.png","data-attachmentid":3257502}[/ATTACH]i measure 12v on pin 16.
[ATTACH=JSON]{"data-align":"none","data-size":"medium","title":"image.png","data-attachmentid":3257502}[/ATTACH]...
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LG 43LH510V Backlight problem
Hello everyone,
I'm trying to fix a small LG TV with wierd issue.
So I check that the display is OK by fashing a lamp at the screen. LCD is okay OSD is showing up.
Now since the BL is dark, I disconneted the BL from the mainboard and I injected voltage to it with my blacklight tester.
The BL turns on, the tester shows around 80V. So the led strips are okay it seems.
Now I started to suspect the BL driver IC which is a MP3378.
I have a donor board (dead cpu) with the same IC, so I swapped the driver IC but it did not solve the issue.
...
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It's a Husqvarna QC330 battery charger.
It's cooled by a heatsink + fan, so I hope it's will endure....
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Finding proper replacement rectifier
Hello everyone,
I'm trying to fix up my battery charger. Where I found a dead schottky rectifier.
This is the dead component PTR30L120CTF:
[URL="https://html.alldatasheet.com/html-pdf/1138681/PFC/PTR30L120CTF/67/1/PTR30L120CTF.html"]PTR30L120CTF datasheet(1/7 Pages) PFC | 30A 120V HPTR Schottky Rectifier (alldatasheet.com)[/URL]
And I have a spare 30CPQ150:
[URL="https://html.alldatasheet.com/html-pdf/83470/IRF/30CPQ150/47/1/30CPQ150.html"]30CPQ150 datasheet(1/5 Pages) IRF | SCHOTTKY RECTIFIER (alldatasheet.com)[/URL]
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[ATTACH=JSON]{"data-align":"none","data-size":"medium","data-attachmentid":3228255}[/ATTACH]
Success!!
I erased the IC and reflashed it with your fixed bin file in neoprogrammer (instead of asprogrammer) and it worked!
Thank you again! You are the best!...
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Okay thank you, Do I need to do the SREG thingy too on this one or just flash it?...
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I uploaded the bin file. I also checked the SMD components around the IC they all seems to be fine. Thank you Sir...
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I only saved (extract) the content of the two ICs I did not experiment with other bin files other than yours. I always desolder the IC, then solder it to a adapter which connects to the CH341A.
[ATTACH=JSON]{"data-align":"none","data-size":"medium","title":"IMG_20240229_174944.jpg","data-attachmentid":3226475}[/ATTACH]I only saved (extract) the content of the two ICs I did not experiment with other bin files other than yours. I always desolder the IC, then solder it to a adapter which connects to the CH341A.
[A...
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Thank you for the detailed steps.
The TV turns on now as soon as I plug in the power cord, but it doesn't display anything. Black light on but black screen....
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Thank you very much, I fire up my programmer right up!
Am I doing it right?
[ATTACH=JSON]{"data-align":"none","data-size":"medium","title":"image.png","data-attachmentid":3226326}[/ATTACH]
Thank you very much, I fire up my programmer right up!
Am I doing it right?
[ATTACH=JSON]{"data-align":"none","data-size":"medium","title":"image.png","data-attachmentid":3226326}[/ATTACH]
...
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Here is the dump file of the IC1603.
[URL]https://1drv.ms/u/s!Ar4hHP2toEdohNZFLQZag9pL0PlHJg?e=3co7kD[/URL]
and
IC IC1604
[URL]https://1drv.ms/u/s!Ar4hHP2toEdohNZGjkVwjEtlkyPd9A?e=TDnb4X[/URL]
Thank you again man, I owe you a pizza.https://Here is the dump file of the...e you a pizza.Here is the dump file of the IC1603.
[URL]https://1drv.ms/u/s!Ar4hHP2toEdohNZFLQZag9pL0PlHJg?e=3co7kD[/URL]...
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Awesome, I extract the dump file and post it as soon as possible!
Thank you!...
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SAMSUNG UE58MU6122 dump file needed
Dear Community,
I have a Samsung UE58MU6122 with no power LED.
I checked the PSU, all output voltages are present so it's probably good.
Doing some research I found that the corruption of the SPI memory chip can cause this problem and the TV started acting like this after a power outage.
Can somebody please provide a dump file so I can flash it to the IC?
Thank you!😊
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I found some CPU on aliexpress, but I don't think it worth the cost\time\labour with BGA. Also found a maiboard in Russia, but I don't know the shipping cost to Hungary. Will look around locally and on ebay for a mainboard.
Anyway, thank you very much for your help!
I will upload the dump file to the site, maybe someone will find some use to it....
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I loaded up the bin file with asProgrammer and NeoProgrammer too and I couldn't find the checksum value, I'm porbably blind.
However, with your help at least I know that where is the problem.
I even tried to tape down signal lines on the T-CON (suspecting a panel short). All I had achieved was the back light and LCD coming on for a few seconds, but turning off completly later. Even when it came to life there was no OSD, power led, or anything. And had to completly power cycle the thing to replicate it. Also, VGH, VLH were also present despite no life on display\BL. So the T-CON...
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Dear lotas[B],[/B]
I checked the signal pins of the ports and I found this:
[ATTACH=JSON]{"data-align":"none","data-size":"small","title":"image.png","data-attachmentid":3180327}[/ATTACH]
15 ohm resistance to ground, while the other signal lines has high resistance. It's on the HDMI port.
Also I saved the bin file from the SPI flash, I got this value after applying Get-FileHash: 8E9DE8A4B2A1F60ED02BA1027C8B1638FFCC3A7E6A46214BC1EC7ADEE288BE9EDear lotas[B],[/B]
I checked the signal...
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Samsung Odyssey CRG9 not powering on
Hello everyone, I'm stuck with the aformentioned gaming monitor.
PSU: BN4400976A
MB: BN41-02699A
[U]Symptom[/U]: NO sign of life. No power led, no backlight or display.
[U]Diagnostics[/U]:
- PSU outputs 12V volt when connectred to MB. PS ON is 7V when disconnected, goes .40V when connected to MB.
- EN signal stays low on 12V buck converter IC so 0V on output when EN pin is connected, all other power rails looks okay.
- Bypassing EN signal by floating EN pin on 12V buck converter results in 12V on output, however still no lifesign.
-...
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