How to choose replacement resistors

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  • TinkerTron
    Schematic vs. Reality: Where Are the Resistors on My Sharp Clock Radio? Model FY-70CH
    by TinkerTron
    Hey everyone,

    I'm currently working on a mid-70s Sharp Electronic Digital Clock Radio, Model FY-70CH. I found the service manual online, printed it out, and have been studying it for a while. My main reasons for tackling this are: (1) I want to learn electronics and figured I'd start with something I had on hand, and (2) I want to fix its issues. Right now, the radio sounds awful, has about 5V DC at the speaker terminals, and the alarm time setting doesn't work. But I'm not asking how to fix these problems.

    Instead, here's what's been bugging me so far:
    The schematic...
    3 Photos
    03-06-2025, 02:03 PM
  • lolich112
    How to find out what resistors i need as a replacement?
    by lolich112
    Hey,
    I have a Palit GTX 750 StormX with 2 gigs. on the backside right above the pcie connectors there are multiple conponents (See in the pics). I suppose those are resistors or capacitors. 2 of them broke of and now I need 2 replacements. I looked arround for some schematics but couldn´t find any. Someone have an idea how to identify those?
    Thanks in advance!...
    09-03-2023, 01:37 PM
  • reformatt
    Macbook Air M2 A2681 Kernel panics after screen replacement
    by reformatt
    Just had a customer bring in a M2 MBA A2681 that had had a screen replacement in April at another repairer. Since then, she has been getting intermittent kernel panics. It's an aftermarket screen, and of course it fails in diagnostics as the calibration hasn't been done. The error in the panic log is "No device added after powering on the rails".

    It seems the original repairer has swapped the board and the screen to other MAC's, and said that it isn't a screen issue. From what I understand, by doing a quick search on Google, this is in fact a screen issue. The panic relates...
    07-31-2025, 08:37 PM
  • the_rem
    Unknown transformer : how to find a good replacement part ?
    by the_rem
    Hello guys,

    I would like a quite old but still good 800 W ATX PSU to be repaired. The problem was an extremely heavy coil whine coming from the small secondary transfomer on the PCB.

    I desoldered it hoping the references on the upper side would allow me to find a adequate replacement part. Sadly the written references drove me nowhere but to the manufacturer (I-MAG). I sent them a message like a bottle in the see asking them to send me a datasheet of the transformer. And... They responded ! I received a kind of datasheet (see attachment) but my competencies do not allow...
    VEF20FB07BW(2025001A)20110927.pdf
    https://drive.google.com
    04-23-2025, 01:48 AM
  • brightest_z
    Hot Air Blew Away Resistors Near Bios
    by brightest_z
    Hi All - I'm in the midst or reprogramming the bios on my gen1 Surface Laptop Studio and I accidentally blew away 2 resistors nearby the bios. I don't have another board to measure values of the missing resistors and schematics aren't available, bbut the bios is a 6x5mm Winbond WSON8, W25R256JWPQ model. The traces are conductive to Pins 3 and 7 (IO2 & IO3 respectively) so I have reason to believe they are 10k pull up resistors since IO2&3 pins are used for Quad SPI instructions.

    Does anyone with more knowledge, and experience than I, know if this is the case?

    ...
    12-11-2024, 08:34 PM
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