Announcement

Collapse
No announcement yet.

philips 55 oled 745 /12 3 blinks

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    #21
    Re: philips 55 oled 745 /12 3 blinks

    i didnt check that when i had jumpers on ,i just checked the other plug for 12v and 24v which were good

    i will reconnect jumpers as before and measure this voltage ,
    it will be in the morning ,
    thanks for all your help and advice so far
    Last edited by jimbofz; 02-16-2021, 03:00 PM.

    Comment


      #22
      Re: philips 55 oled 745 /12 3 blinks

      when i did the first test with jumpers ,i did not check the 24v voltage on the same socket ,but i did check the 12 and 24v on the other plug and it was correct.
      i will check tomorrow the pins on the other sockets labelled+24-a

      Comment


        #23
        Re: philips 55 oled 745 /12 3 blinks

        Originally posted by Diah View Post
        when you did the first test with jumpers, did you have on the same socket 24V?
        remember you wrote before it read 12 !!!

        the pins on the sockets labeled +24V_A
        good morning
        i refitted the links as before and the +24_A voltage is 12.5v

        Comment


          #24
          Re: philips 55 oled 745 /12 3 blinks

          Originally posted by jimbofz View Post
          good morning
          i refitted the links as before and the +24_A voltage is 12.5v
          okay... you need to do 2 other test.
          1- keep this test in place. slide out the 2 cable of +24V_A from the mainboards side .. then turn on.. see if it jump higher than 12.5V at PSU side

          Comment


            #25
            Re: philips 55 oled 745 /12 3 blinks

            no
            voltage stays 12.5v with two cables of +24_A removed

            also no sby light but the other supplies 12v 24v still come up ok with no pic

            Comment


              #26
              Re: philips 55 oled 745 /12 3 blinks

              Originally posted by jimbofz View Post
              no
              voltage stays 12.5v with two cables of +24_A removed

              also no sby light but the other supplies 12v 24v still come up ok with no pic
              you need to check your PSU. specially the 24V line MOSFET if they are for 24V or 12V. the print say 24V..
              Last edited by Diah; 02-17-2021, 04:19 AM.

              Comment


                #27
                Re: philips 55 oled 745 /12 3 blinks

                ok will do

                Comment


                  #28
                  Re: philips 55 oled 745 /12 3 blinks

                  the chassis type is tmp 19.6e and i managed to get cct for tmp18.1e
                  its similar.
                  the 12 and 24 v supplies are produced by the tx t9101,the components are all fine on the secondary of the tx.
                  on the primary we have a drive ic ssc 3s 927 this feeds vgh and vgl to two fets q9101 and q9102
                  with psu removed all components test good
                  the tx o/p pins 8 and 9 should produce 24v,
                  it only produces 12.5 v
                  the same tx pins 10 and 7 produces 12 v
                  and is good

                  the same winding on the primary pin 2 and 3 is used to feed the same 12v and 24v
                  so i dont know why the 24v should be low?

                  Comment


                    #29
                    Re: philips 55 oled 745 /12 3 blinks

                    can you show focused high resolution photo on both side of the PSU. and remark on the photo the 24v_a pin

                    also did you checked after crack at the soldering !!

                    EDIT: i am afraid if the printing label wrong LOL but the 24V are very common range to supply audio section too .. other wise i will do this test.....>
                    you can try after you are sure its should be 24V. to put every things in place as original. and just slide the 2 wire of +24V_A from PSU socket. and test them with DM if they are both connected at mainboards so you can feed only one from the 24V of the panel 24V PIN and then turn on.. LOL

                    so the set should turn on with complete picture .... or it could jumping high to the moon... LOL so funny issue.

                    EDIT: Don't do this test
                    Last edited by Diah; 02-17-2021, 09:13 AM.

                    Comment


                      #30
                      Re: philips 55 oled 745 /12 3 blinks

                      heres some pics of psu
                      i have soldered any joints that might have looked bad with magnifier
                      although the board still looks like new
                      with regards to the +24v_pins , they are joined together
                      Attached Files
                      Last edited by jimbofz; 02-17-2021, 08:24 AM.

                      Comment


                        #31
                        Re: philips 55 oled 745 /12 3 blinks

                        one things more.. you wrote at your picture 24V_A read 12V at STB... so it mean it booted high to 24V after PSU turn on... same way to some of Philips PSU which they read 12V STB then goes high to 18V after turn on.. !!!! mysterious
                        Last edited by Diah; 02-17-2021, 08:41 AM.

                        Comment


                          #32
                          Re: philips 55 oled 745 /12 3 blinks

                          it make no sense to me if +24V_A read 12V at STB as you stated.. can you recheck this point at yours photo https://www.badcaps.net/forum/attach...2&d=1613402078

                          Comment


                            #33
                            Re: philips 55 oled 745 /12 3 blinks

                            i also think it makes no sense
                            ive reinstalled the psu as original state with all connections back to normal
                            and ive re checked the +24v and its 12.5 v in sby and 12.5 v when its blinking
                            ive tried with dm set to peak hold and it wont go above 12.5v

                            Comment


                              #34
                              Re: philips 55 oled 745 /12 3 blinks

                              clean this section in the photo ... ist from you or some one play on PSU before you ?
                              Attached Files

                              Comment


                                #35
                                Re: philips 55 oled 745 /12 3 blinks

                                Originally posted by jimbofz View Post
                                no
                                voltage stays 12.5v with two cables of +24_A removed
                                also no sby light but the other supplies 12v 24v still come up ok with no pic
                                leave this line +24V_A , because when you take them out no STB LED on the set... somethings wrong by label.

                                you need back to the last test to see if the panel damaged or not... you need to plug out the 2 LVDS cable between mainboards & T-CON ( from T-CON Side ) and do the jumpers test as you did first time.. to see if the panel still show lines or it light whole the screen... if its just line as before it shorted.. no need to spend time on this set.

                                Comment


                                  #36
                                  Re: philips 55 oled 745 /12 3 blinks

                                  ok will do the mark on board is a minor scratch nothing to worry about .
                                  i will fit the links again and do the lvds foils one at a time and post the results

                                  Comment


                                    #37
                                    Re: philips 55 oled 745 /12 3 blinks

                                    Originally posted by jimbofz View Post
                                    ok will do the mark on board is a minor scratch nothing to worry about .
                                    i will fit the links again and do the lvds foils one at a time and post the results
                                    No. both Lvds must be disconnected together

                                    Comment


                                      #38
                                      Re: philips 55 oled 745 /12 3 blinks

                                      ok will try tomorrow thanks

                                      Comment


                                        #39
                                        Re: philips 55 oled 745 /12 3 blinks

                                        Originally posted by jimbofz View Post
                                        the chassis type is tmp 19.6e and i managed to get cct for tmp18.1e
                                        its similar.
                                        the 12 and 24 v supplies are produced by the tx t9101,the components are all fine on the secondary of the tx.
                                        on the primary we have a drive ic ssc 3s 927 this feeds vgh and vgl to two fets q9101 and q9102
                                        with psu removed all components test good
                                        the tx o/p pins 8 and 9 should produce 24v,
                                        it only produces 12.5 v
                                        the same tx pins 10 and 7 produces 12 v
                                        and is good

                                        the same winding on the primary pin 2 and 3 is used to feed the same 12v and 24v
                                        so i dont know why the 24v should be low?
                                        Can you upload the chassis TMP18.1E schematic that you are using?
                                        Never stop learning
                                        Basic LCD TV and Monitor troubleshooting guides.
                                        http://www.badcaps.net/forum/showthr...956#post305956

                                        Voltage Regulator (LDO) testing:
                                        http://www.badcaps.net/forum/showthr...999#post300999

                                        Inverter testing using old CFL:
                                        http://www.badcaps.net/forum/showthr...er+testing+cfl

                                        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                                        http://s807.photobucket.com/user/budm/library/

                                        TV Factory reset codes listing:
                                        http://www.badcaps.net/forum/showthread.php?t=24809

                                        Comment


                                          #40
                                          Re: philips 55 oled 745 /12 3 blinks

                                          .
                                          Last edited by Diah; 02-18-2021, 03:34 AM.

                                          Comment

                                          Working...
                                          X