Philips 40PFL4908/F7 Dead

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • HMRG123
    Member
    • Jun 2017
    • 20
    • United States
    #1

    Philips 40PFL4908/F7 Dead

    Have this set and the customer said it just would not turn on one day. Q601 is shorted, R611 and F602 are open. I do not see anything else as bad. Does anyone know of anything else I should check before replacing these parts?

    OOPs, just rechecked and found D653 shorted...same question: Does anyone know of anything else I should check before replacing these parts?
    Last edited by HMRG123; 04-20-2019, 08:52 PM.
    Tags: None
    • neilc6
      Badcaps Legend
      • Nov 2015
      • 1550
      • Canada
      #2
      Re: Philips 40PFL4908/F7 Dead

      The power supply on this model is probably similar design.

      https://www.badcaps.net/forum/showthread.php?t=72916

        Comment

        • Unspun01
          Badcaps Veteran
          • Jun 2011
          • 349
          • Canada
          #3
          Re: Philips 40PFL4908/F7 Dead

          You will want to check and replace at least the following parts:

          F602 (fuse, 2.5A, 250V),
          Q601 (MOSFET transistor, N-channel, 7A/600V),
          D608 (zener diode, 36V, 1Watt),
          R611 (Fusible Resistor, orange, black, silver, gold = 0.3ohm, 5% tolerance, 2 watt),
          D653/D655 (Schottky Diode, SB3A0 = 3A, 100V),
          D607A (zener diode, 27V, 500mW)
          Q602 (2SC5344SY = BJT NPN transistor, 800mA, 30V, SOT-23)

          D607A and Q602 are small surface mount parts on bottom of board.

          See attached service manual.
          Attached Files

            Comment

            Previous template Next

            Related Topics

            Collapse
            • kew1701
              Philips taw6205 ambilight speaker STM32 mcu dead
              by kew1701
              Resolved dead cap which burned mcu(stm32f091rct6) ,between vss and vdd on desoldered mcu is short 5.8oh,is there a way to obtain firmware from it.i have firmware,but i thing this is for wifi/bt board phorus 5 which is on top of amp board(here lies dead mcu)...my stm32 flasher is on the way....
              04-09-2025, 03:59 AM
            • Rubenlily
              Philips 50PUS6503 - dead panel? Picture
              by Rubenlily
              Hey,

              I gave up on my last TV and got a new one to try.

              Only vertical lines. Sound is OK. Screen is black with a few white lines until I change channel, then these colors gradually starts filling up the screen.

              Is this fixable in any way or should I just give up on this one too?...
              08-21-2023, 01:07 PM
            • double_DD
              How can I be sure that my EC chip is dead?
              by double_DD
              Hi all,

              As the title suggests, how can I be sure that my EC chip is really dead?

              I've recently gotten into this hobby of laptop repairs, and have successfully brought back to life a couple with some easy fixes, mostly shorted caps.

              Now I'm working on HP Probook 455 G8, that had some "devil" run around on 3V line, burning a bunch of stuff. Luckily I have a dead 455G7 (for spare parts) so I managed to fix it (swapped burned parts) to a point that it will charge (both on barrel jack and usb-c), but it doesn't want to turn on. There is a 3V3 on a keyboard...
              03-12-2025, 07:47 AM
            • alro7779
              Philips 32PFL4901/F8 BA4GF0F0102 2 Not getting standby led
              by alro7779
              Hello, guys!

              The same 32" Philips TV I was having video issues, but now I don't have standby led at all. Someone here shared with me the schematic of the power supply, and checking the voltages, I see right after the resistor R604 I'm getting 1.6 v which is too low for enabling the Gate of the Q601 mosfet (the diagram says 4.2). On the R614 resistor I'm getting 181 V in and 117 V out, then through R603 I'm getting the same 117 V in and 59.9 V out, finally getting the latter voltage in the R604 BUT getting just 1.6 V out, which is the voltage that goes on to the Gate of the Q601...
              09-14-2025, 12:25 AM
            • G33RT
              Philips 8200 series 65PUS8204/12 stuck at Philips Logo
              by G33RT
              Philips 8200 series 65PUS8204/12 stuck at Philips Logo, it does not reboot it just stays on the logo.

              It does power up when pressing the power button.

              I already try the power button while plugin the plug with no result.
              Also put the latest firmware autorun-TPM191E_R.001.004.100.000.upg on a MBR/FAT32 USB stick at USB port2 with no result either.

              Could this be an PSU or eMMC issue ?
              07-19-2025, 03:43 AM
            • Loading...
            • No more items.
            Working...