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[Solved] Damaged Manta LED1905 TV: Incorrect 24V Connection - Seeking Service Chart & Part Identification

Krystian-323 10551 11
Best answers LABEL_AI_GENERATED

How can I identify the damaged parts and repair a Manta LED1905 TV after it was accidentally connected to 24V?

The damaged U1 on the Manta LED1905 power board is the 5V converter, and the thread identifies it as SY8113B; U3 is also marked SY8113B [#16830118] One user also reported reading the marking as WC6MD and successfully getting the TV to work by removing U1 and fitting a standard 5V regulator with at least 3A current capability, such as a 78T05, though it gets a bit warm [#16807118] Another reply says the board’s active converter U1 is likely the failed part after the 24V mistake and should be replaced first [#16458750] A later follow-up confirms that replacing U1 and the electrolytic capacitors brought back standby LED and 12V on the board, but 5V was still missing in that case [#16548654]
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  • #1 16458505
    Krystian-323
    Level 8  
    Posts: 21
    Rate: 5
    Hello Dear Users. As in the subject of broken TV Manta Led1905 - brother-in-law mistakenly connected it in tira under 24v. Unfortunately, I did not find the service chart and identification of the parts is difficult. If anyone has already dealt with this model I would ask for some help Damaged Manta LED1905 TV: Incorrect 24V Connection - Seeking Service Chart & Part Identification Damaged Manta LED1905 TV: Incorrect 24V Connection - Seeking Service Chart & Part Identification Damaged Manta LED1905 TV: Incorrect 24V Connection - Seeking Service Chart & Part Identification Damaged Manta LED1905 TV: Incorrect 24V Connection - Seeking Service Chart & Part Identification Damaged Manta LED1905 TV: Incorrect 24V Connection - Seeking Service Chart & Part Identification Damaged Manta LED1905 TV: Incorrect 24V Connection - Seeking Service Chart & Part Identification
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  • #2 16458703
    juniorK123
    Level 18  
    Posts: 723
    Help: 30
    Rate: 96
    What are the symptoms after turning on? Is Stby completely dead? U1 sooty or just in the picture it looks like this? 0ohm resistors check, are there any fuses on the board?
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  • #4 16458750
    robokop
    VIP Meritorious for electroda.pl  
    Posts: 29412
    Help: 1763
    Rate: 6371
    Evidently damaged U1 - active converter. Replace, we'll see what to do next.
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  • #5 16459073
    Krystian-323
    Level 8  
    Posts: 21
    Rate: 5
    After connecting the power supply, no reaction - completely dead. The problem is that I can't identify what U1 is.

    Added after 1 [hours] 4 [minutes]:

    The only thing I could read from U1 is the first letter "W" unfortunately nothing more
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  • #6 16548654
    Krystian-323
    Level 8  
    Posts: 21
    Rate: 5
    Replaced U1 and all electrolytes, the standby LED is on the board is 12v - unfortunately no 5v.
  • #7 16694467
    mąci
    Level 15  
    Posts: 438
    Rate: 90
    I have a similar topic, it was also connected to 24V. A blown "P" fuse with replacement still does not turn on, but UD1 heats up terribly.
    I read the WC5TN from it. 95% because it's difficult to see. However, I can not find anything about this arrangement.
  • #8 16795372
    tomcio1199
    Level 14  
    Posts: 178
    Help: 1
    Rate: 45
    Hello
    I have the same problem, the TV was connected to 24V and it smashed the U1 system, did anyone decipher what the system is ?? Nowhere can you find a service center for this model ....
    Added after 1 [minutes]:
    Buddy Krystian, what layout did you put in place U1 ???
    Added after 8 [minutes]:
    I suspect you have inserted the wrong U1 circuit because it is responsible for 5V ?? Somewhere I found on a parallel forum that you can insert a 7805 stabilizer and the TV also starts working ...
  • #9 16807118
    1234Leszek
    Level 12  
    Posts: 67
    Help: 1
    Rate: 57
    The U1 system is a 5V converter with the symbol WC6MD (it is nowhere to be found). I inserted, after removing the U1, the most ordinary 5V stabilizer with a current of at least 3A (e.g. 78T05). The TV works, there is 5V in the place described on the plate, only the stabilizer heats up a little.
  • #10 16826809
    Emilio gallego
    Level 1  
    Posts: 1
    Rate: 1
    Hi, i have the same problem. The UD1 circuit ,6pin is burn and i can not read the serial identification. Someone can help me to repair this board. Thanks.
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Topic summary

LABEL_AI_GENERATED
The discussion revolves around a Manta LED1905 TV that was damaged due to incorrect 24V power connection. Users report symptoms of the TV being completely dead after the incident, with specific focus on identifying and replacing the U1 component, which is a 5V converter. Various users suggest checking resistors, fuses, and replacing the U1 component with alternatives like the SY8113B or a standard 5V stabilizer (e.g., 78T05). Some users also mention issues with the UD1 circuit and the difficulty in finding service charts or parts for this model. The conversation highlights troubleshooting steps and component identification for repair.
AI summary based on the discussion. May contain errors.
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