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  • unimatrix93
    LG fridge compressor not starting
    by unimatrix93
    Hello everyone, my old but loved LG GR-642 stopped cooling and frosting all together.
    The display shows everything as normal, the focused cooling activated when I open the doors but the compressor wont start.

    First I measured the terminals on the compressor at the back of the fridge. 0 volts.
    Now I disconnected the compressor and measured resistance on its leads: around 8 ohms.

    I dissassembled the main powerboard, couldn't find anything suspicious but I noticed that the comps relay wont send voltage to the pin, while Fan H and fan L is indeed at 230V....
    11-22-2024, 03:27 AM
  • Document Archive
    Mounting and Handling Guidelines for TO220 TO220F TO247 Cases / Packages
    by Document Archive
    Mounting and Handling Guidelines for TO220 TO220F TO247 Cases / Packages

    The TO220, TO220F and TO247 are the popular packages for power devices because of their versatility and ability to dissipate moderate amounts of heat. This application note describes the basic guidelines for handling power MOSFETs in TO220, TO220 and TO247 packages shown in Figure 1. Please note that only mechanical and soldering guidelines are covered here. Additional precautions are required for isolating high voltage rated devices to meet safety regulations.

    Securing a good thermal interface between...
    10-07-2024, 04:35 AM
  • harp
    detecting heat with IR LED receiver
    by harp
    detecting heat with IR LED receiver

    I have some dark IR led, and want to know if it is be situable to detect pure heat (not visable glow ir radiation) in well lighted desk?

    So, if I put hand over it in near distance like few centimeters, that detect rising heat, not covering it from light.
    Something like termal camera, but in one spot, any simple circuit?...
    09-06-2023, 06:03 PM
  • ludovik
    Moto G84 short after heat
    by ludovik
    Hello everyone,
    i was reballing the power manger of a moto g84, after applying heat i tried to power on and it wouldn’t.
    i injected 1.5v to some capacitor that seem in short because both side beep if tested.
    when i inject i feel the cpu burning;
    since the cpu is exactly on the other side of the board, is that possible that the heat from the reballing damaged the cpu? do you know where i can find schematics or what can i do?
    i know this is not enough to explain the situation so if you need any other info ask me please!
    Thank you very much in advance
    11-08-2024, 02:13 PM
  • jm1234
    Solder joints on heat sinks matter?
    by jm1234
    Hi,
    solder joints on heat sinks - how much do they matter? Could poor joints on heat sink cause issues if they are not properly joining to hot ground?
    I'm looking at power source module of Panasonic plasma TV and I see many of these having visually poor quality, but could they matter? In general I would guess no, but I saw a video where someone was stressing out the importance of tightening the screws when fastening the power source board specifically for the ground to be connected properly.
    Thanks
    04-28-2024, 04:38 AM
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