sansui sty0440

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • vaughanB
    New Member
    • Apr 2013
    • 7
    • south africa

    #1

    sansui sty0440

    hi i have a problem with a sansui tv 40inch lcd model sty0440 it powers on but no display i replaced the powersupply with a new one i did test for voltages on the main board and do get the normal voltages im not getting voltages on the inverter board samsung INV40N14B and dont get any thing

    please im a newbie @ this stuff please guide me
    thanks in advance
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: sansui sty0440

    Can you supply some pictures of inside the chassis?
    Do you have a digital multimeter?
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

    Comment

    • vaughanB
      New Member
      • Apr 2013
      • 7
      • south africa

      #3
      Re: sansui sty0440

      yes i have a dmm
      Attached Files

      Comment

      • vaughanB
        New Member
        • Apr 2013
        • 7
        • south africa

        #4
        Re: sansui sty0440

        hi guys any help please i do get the voltages on the pcb but nothing on inverter an tcon board i do get voltages on the main board also any ideas

        Comment

        Related Topics

        Collapse

        • Capacitorial
          Powersupply has all the voltages - Monitor still no power
          by Capacitorial
          Hello guys,

          I have a Philips 240B7QPJEB. The monitor seems completely dead.
          I opened it and measured the voltages of the powersupply. I found that a mosfet was dead and replaced it.
          On the connector, that goes to the TCON board, all voltages 15-19V and 5V are present.
          The small connector on the left of the PSU has two cables with 18V and all the other have 0.2V. It connects on this small connector on the left ontop of the panel. I guess the backlight? Seens fine I guess.
          The weird thing is, that the Power LED is powered over the TCON board.
          On The TCON...
          12-28-2024, 02:12 PM
        • gjgib
          Help reading schematic voltages input/output
          by gjgib
          Hello, this might be embarassing since I consider it a dumb question but keeps me kinda stuck sometimes in my journey.

          I want to know if there is any post in this forum which explains my questions. A) When, where and how do I know when X voltage line is input or output. Example:


          I'm battling with this IC to understand it's voltages. It's from non-turning-on Lenovo Ideapad 3 15iil05 - NM-D461.

          I see some lines like +5VL / +5VALW / V9B+ / +3VALW being okay and some others like 1.8VALW / +0.6VS / +2.5V_DDR. I just know that some of them are bad or missing,...
          05-06-2024, 08:11 PM
        • RossMoodley1967
          HISENSE LCD LED TV MODEL HX40N2176F LED DRIVER SN51DP IC PINOUT AND VOLTAGES
          by RossMoodley1967
          Hello

          Need to know the voltages that will be present on SN51DP ic when tv is in standby and when powered on.

          Just to elaborate on the problem with the tv 1.set came in with flash of HISENSE logo on screen then back into standby.2. Now tv when plugged in red standby light present to quickly changes to blue but no backlights.3.Then an hour ago i checked again , came on standby and stayed until i pressed the power button which changed to power on (blue)4.As far as the led driver circuit goes voltage at output in standby was 38v , power on led light up voltages rise 58v-68v...
          03-01-2024, 06:07 AM
        • karlp028
          MSI Z390-A PRO missing VCORE voltages
          by karlp028
          I've got an MSI Z390-A Pro motherboard that starts up fine, but it's missing the VCORE (and VGT) voltages. All of the other voltages are present (e.g. VCCSA, VCCIO) and I know the CPU (i7-9700k) is good. Now, the original PWM controller (UP9521P) had an internal short and I replaced it with a new one. All of the enable signals look good. The problem seems to be the PWM signals going to the MOSFET drivers. I checked them with an oscilloscope and they are all flat 1.5V with no pulses. I don't know why this would be and I'm not sure where to look next.
          06-23-2025, 01:25 AM
        • lol999
          Asus Prime x299 Deluxe - no VCCIO VCCSA voltages
          by lol999
          Motherboard after starting show Q code 00.
          No shorts on any rail ( at last I can't finde any)
          All voltage are correct on SIO - 3.3V, PCH power 1V , DDR 1.2V, SPI 8 leg 3.3V
          Nothing get hot, PSU starting, all lights came ON....
          One thing i can see incorrect is no VCCIO and VCCSA voltages and no main power on CPU.
          After deep looking I found dead Synchronous Buck converter CSD97374Q4M that is powering VCCIO for CPU but after replacing it nothing changed. Voltages on it are correct....
          This buck converter is PWM'ed by Asus DigiVRM ASP1405I-62T. Can't finde any datasheet...
          01-21-2024, 02:25 PM
        • Loading...
        • No more items.
        Working...