Issue with Sharp LC-47SB57UT

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • leorivers
    New Member
    • Oct 2024
    • 2
    • United States

    #1

    Issue with Sharp LC-47SB57UT

    Hello,
    I bought Sharp LC-47SB57UT 6 years ago. I had to have a vhf antenna to pick up one local station(koco channel 5 OKC). It has worked great up until a week ago. Sometimes I couldn't get channel 5, now I can't receive it at all. I can hook up a digital convertor box I have from another tv and can receive channel 5.
    I think the antenna and cable is ok. I doubt that this would be the tuner board or possibly something else.

    Any ideas where I should start?​

Related Topics

Collapse

  • claytongarcia
    Issue with Sharp LC-42SB45U
    by claytongarcia
    Hello everyone,

    I recently got a model Sharp TV, and I've noticed that the green power LED is flashing without any specific pattern. Additionally, there appears to be no voltage coming from the power board. I haven't observed any leaking or bulging capacitors, although the top of the larger capacitor doesn't seem to be perfectly flush with the jacket—if that makes sense.

    Has anyone dealt with this issue before?​
    03-10-2025, 07:27 PM
  • eccerr0r
    old X58 triple channel board... memtest86 memory speed?
    by eccerr0r
    Anyone run memory speed tests with an old X58-based triple channel 1st gen or any other >2 channel board? The one I have is a Gigabyte I think.

    Anyway I had four 4GB DDR3-1333 modules in the 6 memory slots and got around 11GB/sec memory speeds assuming that it went dual channel since it didn't have enough modules for triple channel. Now I stuck in two more 4GB modules, but they are DDR3-1600. I'm still getting 11GB/sec speeds according to memtest86...

    Just wondering, anyone do memory speed analysis on these triple (and higher) channel memory boards? Are there any...
    06-28-2025, 09:06 AM
  • spleenharvester
    Reverse engineering of 18650 4-channel tester
    by spleenharvester
    Hi friends

    I have reverse engineered this tester, schematic is attached and is complete except for capacitor values. These testers annoyingly have no model number but they are the ones you find on the first page of just about any website if you type in "18650 4-channel tester". There is also a 2-channel variant and a newer 8-channel variant. They are very cheap (about £15) and can measure voltage, current, internal resistance and capacity. They have a multicolour display for all these statistics. They also have terminal blocks so that if you want to use a breakout board...
    05-04-2025, 02:43 AM
  • mikey5791
    Help on car amplifier only one channel works
    by mikey5791
    Hi all forum members,
    Fyi, i have been working on this old model PCT-4082 (4 channel car amplifier). The owner said only one channel is working.
    My initial finding is this amp originally use Toshiba 2SA1943 and 2SC5200 transistor for its output but after opening the top casing i found it used Toshiba A1941 (pnp)and C5198(npn). I desoldered all the 4 pairs transistors and found 1 piece A1941 open(tested "OL" on all legs) and replaced the 1st pair with 2SA1943 and 2SC5200, thats why you can see in the picture it is the bigger size transistor. The other A1941 and C5198 all...
    08-06-2025, 10:36 PM
  • rounin
    MacBook Air A2337 (820-02016) USB-C Port Issue – Only Works in One Orientation (CC Line Problem?)
    by rounin
    Hi everyone,

    I'm working on a MacBook Air 2020 (A2337, board 820-02016) and running into a strange USB-C issue. I've gone through quite a bit of testing and part replacement, but I'm stuck — hoping someone here can shed some light.

    🛠 Original Issue
    The machine initially wouldn't negotiate 20V over USB-C — stuck at 5V.
    Diagnosis showed PP1V5_UPC0_LDO_CORE shorted to ground.

    I replaced U3100 (UF400) using a donor board (A2179), and the machine powers on fine now.

    ⚠️ New Problem: One USB-C Port Only Works in One Orientation...
    04-19-2025, 01:18 AM
  • Loading...
  • No more items.
Working...