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Sparky BR2 12E-CH Charger: Diode Constantly Lit, No Voltage, Overheating Zener Diode & Resistor

mihis 8172 6
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #1 16618947
    mihis
    Level 2  
    I have a charger named in the topic, but it has stopped charging - the green diode is constantly lit, which means full charge, no voltage on the charging terminals. After drawing it looks like the pictures, the 12v zener diode and the gray large resistor heat terribly and the diode does not let voltage pass. After shorting the diode, voltage is given but the resistor even burns. It seems to me that the transistor in the second picture may have burnt and it is the reason for the confusion. However, I would prefer to hear the opinions of someone more knowledgeable
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  • #2 16619016
    gumisie
    Level 43  
    mihis wrote:
    After shorting the diode, voltage is given but the resistor even burns.
    Which one?, This zener 12V D3 or D9?
    mihis wrote:
    It seems to me that the transistor in the second picture may have burnt and it is the reason for the confusion.
    And from this you had to start (measure, replace) and not from some experiments.
    Regards.
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  • #3 16620015
    mihis
    Level 2  
    [Quote = "gummi bears"]
    mihis wrote:
    After shorting the diode, voltage is given but the resistor even burns.
    Which one?, This zener 12V D3 or D9?
    mihis wrote:
    this 12v d3


    I replaced the transistor and the 12v d3 diode. Still unchanged, the resistor and diode are burning. The voltage at the input of the resistor is 16.6V and at the output of 11V, no voltage passes through the diode. And 16.5V on both legs of the transistor. I have no idea how to approach this, how to measure something, please write, I will add value
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  • #4 16620191
    gumisie
    Level 43  
    Hello.
    Take a photo of the PCB from the printing side so that the entire board is visible, also give the symbol of this transistor.
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  • #5 16620459
    mihis
    Level 2  
    It looks like the pictures (yes I know mega makeshift but I bought a transistor in the wrong housing plus I wanted to see if it works).


    The transistor we are talking about is IRFR5305 I installed IRF5305 but it is generally the same
    Sparky BR2 12E-CH Charger: Diode Constantly Lit, No Voltage, Overheating Zener Diode & Resistor Sparky BR2 12E-CH Charger: Diode Constantly Lit, No Voltage, Overheating Zener Diode & Resistor Sparky BR2 12E-CH Charger: Diode Constantly Lit, No Voltage, Overheating Zener Diode & Resistor Sparky BR2 12E-CH Charger: Diode Constantly Lit, No Voltage, Overheating Zener Diode & Resistor
  • #6 16621236
    gumisie
    Level 43  
    This resistor together with the D? / 12V diode form a 12V voltage stabilizer circuit used to supply the control system. The reason for the heating of these elements is damage to any of the components of this system. Remove US 4060 and check the voltage (12V) at the output of this resistor, if it is still low, repeat the same action with US LM358. In addition, to check the other diodes as well as these two other transistors.
  • #7 17526674
    piotrekslup
    Level 11  
    In my with identical symptoms the 3V zener diode was damaged. After replacement it works as it should.
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Topic summary

The discussion revolves around a Sparky BR2 12E-CH charger that has ceased functioning, indicated by a constantly lit green diode and no voltage at the charging terminals. The user reports overheating of the 12V zener diode and a large gray resistor, with attempts to short the diode resulting in further resistor damage. Responses suggest checking and replacing components, including the zener diode (D3 or D9), the transistor (IRFR5305), and other associated components like the US 4060 and LM358. One user noted that a damaged 3V zener diode caused similar symptoms in their charger, which was resolved after replacement.
Summary generated by the language model.
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