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LG32LB1R TV: Identifying Zener Diodes ZD402 & ZD404 for YP2632T Power Board Replacement

aadam07 11202 16
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What are the replacement zener diodes ZD402 and ZD404 on the YP2632T power board for an LG32LB1R TV?

ZD402 is marked “Y3” on the board, and ZD404 was identified as “Y13”, essentially a 36 V zener diode [#14793310][#14801250] The thread also suggests checking the LGP32-ATN power supply schematic and comparing it with the board layout to confirm the surrounding circuitry and diode connection [#14794473][#14798653] If you are replacing ZD404 specifically, the final identification given in the thread is Y13 / about 36 V [#14801250]
AI summary based on the discussion. May contain errors.
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  • #1 14792682
    aadam07
    Level 8  
    Posts: 6
    Rate: 6
    I spoiled my power for YP2632T. Destroyed znenerové diodes that ZD402 and ZD404 can not be read. Can anyone tell me what the diodes are?
    Thank you

    LG32LB1R TV: Identifying Zener Diodes ZD402 & ZD404 for YP2632T Power Board Replacement
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  • #2 14793310
    lisek
    Service technician RTV  
    Posts: 39927
    Help: 6340
    Rate: 6862
    Quote:
    IC301= L6561D
    IC302,IC304 - FAN7601
    IC303 - AO4428B / MIC4428
    Q1 - W20NM60
    Q102,Q103 - P9NK60Z
    Q104 - P7NK80ZFP


    Na francuskim forum Link napisano
    Quote:
    ZD401 correspond à : ZD401 0DR050008AA SD05.TC R/TP SEMTECH SOD323.
    ZD402 il est inscrit "Y3"

    Look for Link_ parts view 32LX2R
    parts ZD308
  • #3 14793405
    aadam07
    Level 8  
    Posts: 6
    Rate: 6
    The ZD404 diode is what?
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  • #4 14793603
    lisek
    Service technician RTV  
    Posts: 39927
    Help: 6340
    Rate: 6862
    Well look at applications FAN7601. (IC302 / 304) * FAN7601, LAF0001)
    - you can pre-draw this part of the layout on a piece of paper + pencil
    to see what pin.IC304 can it be? Zener diode connected

    LG32LB1R TV: Identifying Zener Diodes ZD402 & ZD404 for YP2632T Power Board Replacement
  • #5 14793694
    aadam07
    Level 8  
    Posts: 6
    Rate: 6
    I exchanged the IC302. ZD404 is burned only. I apologize for my Polish, I Slovak.
  • #6 14793812
    mirex
    Level 43  
    Posts: 21794
    Help: 1950
    Rate: 1989
    lisek wrote:
    Well look at FAN7601 applications. (IC302 / 304) * FAN7601, LAF0001)
    - you can pre-draw this part of the layout on a piece of paper + pencil
    to see what pin.IC304 can it be? Zener diode connected

    But you ... you're licking the fox.
    You would at least have the trouble to check where the LEDs are instead of writing idiot not on the subject!
  • #7 14793836
    Malek
    Level 21  
    Posts: 649
    Help: 7
    Rate: 29
    So what did this post bring to solve the problem? Lisek has a lot of knowledge in the subject and tries to help everyone without hitting points with haunted, empty posts.
    Mirex, if you have nothing specific to write, sit down and sit on d ... e

    Mr moderator of mercy .....
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  • #8 14793845
    lisek
    Service technician RTV  
    Posts: 39927
    Help: 6340
    Rate: 6862
    I looked at the photo.autora and red rims ... the rest went like a piece of cake with butter ?!

    And the truth is hidden

    LG32LB1R TV: Identifying Zener Diodes ZD402 & ZD404 for YP2632T Power Board Replacement
  • #9 14794010
    mirex
    Level 43  
    Posts: 21794
    Help: 1950
    Rate: 1989
    lisek wrote:
    And the truth is hidden

    Well, show it now. :)
    I would take a fairly familiar model of this manufacturer for comparison. Maybe something would come up. ;)
    lisek wrote:
    I looked at the photo.autora and red borders ... the rest went like a piece of cake with butter ?!

    These are the effects when "borrowing" pictures from other fors, but they do not describe them humanly and do not provide links. ;)
    You have the same way. Copy what you can, without thinking in general. ;)
  • #10 14794417
    lisek
    Service technician RTV  
    Posts: 39927
    Help: 6340
    Rate: 6862
    I see that my last post has "glided into space", so I will repeat:
    Read on the Forum about Lgp32-Atn-Power Supply Yuyang Telecom.
  • #11 14794473
    mirex
    Level 43  
    Posts: 21794
    Help: 1950
    Rate: 1989
    lisek wrote:
    I see that "my last post has sailed into space"

    Because you're totally out. That's why I reported. But the attachment itself, not the content of the whole post. ;) Admin knows better, so do not discuss. :)
    Recently, the file from STR-W6053 has been added to the forum once again. Take a look at it and check it out. Especially when you loaded yourself once.

    lisek wrote:
    Read about the Lgp32-Atn-Power Supply Yuyang Telecom

    Why the hell? Find out what is the wanted diode ZD404 ?? Do not overdo it!
    The correct hint is "analyze the LGP32 ATN scheme and compare it with your motherboard. Maybe you can deduce what parameters the diode should have."
  • #12 14794489
    lisek
    Service technician RTV  
    Posts: 39927
    Help: 6340
    Rate: 6862
    Quote:
    "analyze the LGP32 ATN scheme and compare it with your motherboard. Maybe you can deduce what parameters the diode should have.


    With "your lips you took it out" that is, I had to change the keyboard in the meantime, so you were faster. (' :D ') (' :D ')
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  • #13 14798486
    aadam07
    Level 8  
    Posts: 6
    Rate: 6
    I preanalizoval scheme Lgp32-Atn-Power Supply, but I am not mudra.
    It could probably be a Zener diode to 6V, but I'm not sure.
  • #14 14798545
    mirex
    Level 43  
    Posts: 21794
    Help: 1950
    Rate: 1989
    Then draw us where this LED is on. Just.
  • #15 14798580
    aadam07
    Level 8  
    Posts: 6
    Rate: 6
    At the top is marked with an arrow ZD404.
    Attachments:
    • LG32LB1R TV: Identifying Zener Diodes ZD402 & ZD404 for YP2632T Power Board Replacement Plosak2_upr.jpg (2.41 MB) You must be logged in to download this attachment.
  • #16 14798653
    mirex
    Level 43  
    Posts: 21794
    Help: 1950
    Rate: 1989
    We know where it is on the record!
    We want to know where it is in the electronic system.
    Please make a freehand drawing (diagram) of this piece of power supply.

    If you can not think of a model based on the LGP32 scheme, then maybe we will succeed.

    Or maybe there is no similar solution there and you have to move your head. ;)

    So a pencil, a card and to work. Exactly - where the cathode, where the anode plus all the elements associated with it. If it has any connection to the transistor, then what does this transistor do next.
  • #17 14801250
    aadam07
    Level 8  
    Posts: 6
    Rate: 6
    Thank you for your help.
    The diode is Y13, essentially 36V.
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Topic summary

✨ The discussion revolves around identifying replacement Zener diodes ZD402 and ZD404 for the YP2632T power board of the LG32LB1R TV. The original poster reported damage to these diodes and sought assistance in determining their specifications. Various users contributed insights, suggesting that ZD404 might be a 6V Zener diode and referencing the LGP32 ATN power supply schematic for further analysis. The conversation included requests for diagrams and clarifications on the diode's placement within the circuit. Ultimately, it was concluded that ZD404 is a Y13 diode rated at approximately 36V.
AI summary based on the discussion. May contain errors.
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