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Cooler Master model: RS-750-ACAA-E3 - Burnt out TNY278PN and R17 and ZD7

rafal8916 16185 6
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  • #1 15371220
    rafal8916
    Welding machines specialist  
    Cooler Master model: RS-750-ACAA-E3 - Burnt out TNY278PN and R17 and ZD7
    Hello.

    Problem with the power supply as in the topic. Ruptured TNY278PN. Burnt resistor R17. From the strips I managed to read 2.2M (I'm not sure of this value!), And the Zener diode SMD ZD7 in series with the resistor. Unfortunately, it is impossible to read what voltage the diode is on, it is connected in parallel between the one leg and S the integrated circuit TNY278PN.

    I need a value:
    ZD7
    R17
    For a person who will help (knows the value of elements) or be so polite and will measure the voltage on the diode and read the value of the resistor from the power supply he owns), the 100pkt plus reward provided helped.

    greetings
    Rafal
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    #2 15371794
    TONI_2003
    Moderator  
    rafal8916 wrote:
    From the strips I managed to read 2.2M (I'm not sure of this value!), And the Zener diode SMD ZD7 in series with the resistor.

    Cooler Master model: RS-750-ACAA-E3 - Burnt out TNY278PN and R17 and ZD7
    Are you sure that it is: TNY279, and not like in the other less powerful was probably TNY278PN? According to the application for the system you can analyze (figure) ... Should you ask if this is the end of the damage? How is 24N60C3 and what APFC says (layout) ...
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  • #3 15372149
    rafal8916
    Welding machines specialist  
    After all, I wrote that 278PN, not 279. I saw Datasheet, but the system does not agree with this application. Mosfets after the original operational. APFC not yet tested. I am still looking for info.
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    #4 15372720
    TONI_2003
    Moderator  
    rafal8916 wrote:
    After all, I wrote that 278PN and not 279

    Well, I do not know where I've seen this :D probably "light darkness" ...
    rafal8916 wrote:
    however, the system does not match this application

    Did you hope so ...? You need to look for analogies are just new trends in ATX and probably will fall out in the runways (look at other power supplies from this company).
    rafal8916 wrote:
    Still looking for info.

    Then help yourself first, because these power supplies are not popular on our market, and with this number of models finding exactly the same will be bordering on a certain phenomenon ...
    I keep repeating that the founder of his subject would create a kind of photorelation of repairs for posterity (and what?), And then it is as usual :cry:
    So where are :D
    Cooler Master model: RS-750-ACAA-E3 - Burnt out TNY278PN and R17 and ZD7
  • #5 15373279
    rafal8916
    Welding machines specialist  
    Ok, I'll put in photos, but they will not be Top Quality because now I have only 2mpx camera in Nude 9000. The zener diode is from the print side (SMD). Metallized resistor, plain THT.

    TONI_2003 wrote:
    Did you hope that ...?


    It happens more than once that the systems are erased from the PDF, unfortunately not in this case.

    On a daily basis, I do not repair computer power supplies, it deals with a slightly different branch of electronics.
  • Helpful post
    #6 15381516
    lisek
    Service technician RTV  
    CoolerMaster 750W should be based on:
    - classic APFC, built on CM6800 + field 24N60C03 (TO-247)
    - TNY278PN standby
    - PS113 supervisor
    - 2 or 3 opto.
    Quote:
    ZD7 in series with the resistor. Unfortunately, it is impossible to read what voltage the diode is on, it is connected in parallel between the one leg and S the integrated circuit TNY278PN.

    Is that? After all, pin 1 and S are the output for the CE opto connector?
    Cooler Master model: RS-750-ACAA-E3 - Burnt out TNY278PN and R17 and ZD7 Cooler Master model: RS-750-ACAA-E3 - Burnt out TNY278PN and R17 and ZD7 Cooler Master model: RS-750-ACAA-E3 - Burnt out TNY278PN and R17 and ZD7

    You probably have the search elements in the power pin?!
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  • #7 15383855
    rafal8916
    Welding machines specialist  
    I will answer myself.
    Resistor 2,21M metallized, Zener diode 5V1 , suspicious in the second efficient PSU. The connection, as I wrote above, unfortunately, the primary winding of the transformer of the standby converter has a break, you will have to rewind, because buy a ready one will probably fail ...
    Everyone who has given in the topic gets "helped".
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Topic summary

The discussion revolves around a malfunctioning Cooler Master power supply model RS-750-ACAA-E3, specifically focusing on a burnt TNY278PN integrated circuit, a damaged resistor (R17), and an unidentified Zener diode (ZD7). The user seeks assistance in identifying the values for R17 and ZD7, as well as any potential further damage to the power supply. Responses include clarifications on the components involved, with one user confirming that R17 is a 2.21M metallized resistor and ZD7 is a 5V1 Zener diode. The conversation also touches on the challenges of sourcing exact replacement parts and the need for rewinding the primary winding of the standby converter due to damage.
Summary generated by the language model.
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