Announcement

Collapse
No announcement yet.

olevia 242 s11, replaced all big caps in psu and others, still no go

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
    #1

    olevia 242 s11, replaced all big caps in psu and others, still no go

    Hi everyone,

    I was excited to spend 20 bucks and fix a multi hundred dollar tv.

    the TV initially lost sound unless you left it on for 5 min then turned off and right back on. then next week even the standby light went out.

    I got a kit with all the needed caps. I didn't see a single one that looked bad on the primary side of the psu but still replaced any large ones (aside from the hugest one which the kit seller said hardly ever goes bad)

    It appears only the secondary side had bad caps. Again, regardless I replaced any I could. I have 4 or 5 tiny caps that I was afraid to mess with due to the circuitry near them being pretty tightly packed. My solder iron tip isn't what it used to be ... its ready for the dumpster really....
    None of the tiny caps looked even slightly bad anyway.

    Plugged it back it, the standby light is back. Turned it on, the initialization screen shows for a fraction of the time its supposed to then the screen and backlight both go out. Standby light does not come back on though. I left it "on" for an hour and then turned off and one quickly, no joy. turn it "off" and standby light comes back on.

    I did find two modules that seemed to relate to the LCD on either side of the LCD, one labeled master the other slave, they each had 2 470's that were obviously blown. They were surface mounted on the board, no holes, just puddle of solder and goo on the sides of the cap to hold it in place Replaced them, did a GOOD job replacing them, but symptoms unchanged.

    At a loss here, did I fail to solder something properly? the tiny caps dead?
    Could I have cooked a diode or something near one of the caps?

    I read sometimes it the invertor... is that the transformer on the psu board? Where can I get a cheap esr meter to investigate these caps and how can I tell where I may have just not had enough heat on my iron? (is there a meter I can use rather than just waste a bunch of de-solder?)

    Thanks
    Andrew
    Last edited by dosmastr; 12-10-2012, 06:03 AM.
    Tags: None
    #2
    Re: olevia 242 s11, replaced all big caps in psu and others, still no go

    Looking at the rear of the set (holes in back of panel) do you see them lght up briefly then go out or do they go out almost immediately like the logo?
    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

      #3
      Re: olevia 242 s11, replaced all big caps in psu and others, still no go

      duplicate post.. please ignore
      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

        #4
        Re: olevia 242 s11, replaced all big caps in psu and others, still no go

        they go off when the screen goes off, or maybe a second after.

        I don't have the tv in front of me but I'm pretty sure thats what it does.

        The initialization screen is WHITE, I def don't still see it after a second or two. (meaning I don't think the backlight alone is turning off, the screen itself is too)

        Comment

          #5
          Re: olevia 242 s11, replaced all big caps in psu and others, still no go

          Can you check the 24V supply... if you need help locating it, pictures are -always- welcome...
          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

            #6
            Re: olevia 242 s11, replaced all big caps in psu and others, still no go

            would that be a section of the psu?

            I'm fearful I may have cold soldered something... my tip is in very sorry shape

            Comment

              #7
              Re: olevia 242 s11, replaced all big caps in psu and others, still no go

              It's the power output going the inverter(s). As I said, pictures help us greatly.
              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

                #8
                Re: olevia 242 s11, replaced all big caps in psu and others, still no go

                Inadequate I know, but this is a start.

                http://www.amazon.com/Repair-Olevia-.../dp/B0067FO44K

                All the big caps around the peremeter were replaced, just the tiny ones in the middle were not because the circuit got pretty complex near them.

                All the obviously blown ones were on the secondary, or right side of that image.

                The big boy in blue looked ok too, the refurb kit seller said they hardly ever die.
                Last edited by dosmastr; 12-16-2012, 06:48 AM.

                Comment

                  #9
                  Re: olevia 242 s11, replaced all big caps in psu and others, still no go

                  http://www.ebay.com/itm/OLEVIA-242-S...item2578272a0f

                  somehow every cap on this board *looked* ok

                  Comment

                    #10
                    Re: olevia 242 s11, replaced all big caps in psu and others, still no go

                    http://www.ebay.com/itm/OLEVIA-242FH...item3ccb657909

                    This is very similar to the board I replaced 2 470uf caps one. there were actually 2 of these, one on each side of the tv, a master and a slave.

                    They both looked like the top one. the caps and much of the stuff on the board if not all was surface mount.

                    Tv acted the same with new caps on inverter boards as it did with the old popped ones. (they had maybe half the top covered with a film of black goo) I had an old p4 board that had caps looked just like them... somehow it still worked fine.

                    TV is at the inlaws and our place is small.... have to talk wife into letting my bring it home... this is something that will not be easy...
                    Last edited by dosmastr; 12-16-2012, 06:36 AM.

                    Comment

                      #11
                      Re: olevia 242 s11, replaced all big caps in psu and others, still no go

                      I can't find a hole to look at the backlights through. I did learn something though on the primary inverter board is a blue led that lights and then fades out about 8 seconds after the power button is pressed.

                      Is there likely anything heat sensative on those boards? It took me a while to realize that there was no hole for the cap leads to go through - surface mounted.

                      I can post a video of this if it will help. The backlights appear to be pretty secured behind a metal plate with 0 holes (hence I can't tell if the backlight is off or on without looking at the screen)

                      Comment

                        #12
                        Re: olevia 242 s11, replaced all big caps in psu and others, still no go

                        Oh wait! I forgot to plugin the invertor back into the tv!
                        26 bucks later tv is good again!

                        Now I just have to put back in the 30 screws... and see if the initial failure (sound) has also been corrected by the new caps

                        Comment

                          #13
                          Re: olevia 242 s11, replaced all big caps in psu and others, still no go

                          Excellent! You could always use a basic 2.1 system with the TV using the headphone jack if you can't get the sound working.
                          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

                            #14
                            Re: olevia 242 s11, replaced all big caps in psu and others, still no go

                            Sound is good too, I guess the amp for sound is directly psu powered too

                            Osi model level 1 faults are most common! (Wire is open/shorted or disconnected)

                            Comment

                              #15
                              Re: olevia 242 s11, replaced all big caps in psu and others, still no go

                              I am going through the same thing right now. I shut the tv down and the sound came back. Unplugged the TV for ten hours and now no sound again.

                              I have my 120V CPU speakers plugged into the head phone jack for now. Looks like I better get the capacitor kit ordered...

                              Comment

                              Previous template Next
                              Working...