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Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

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    Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

    Hi everybody,
    I have Philips 40PFL7007K/12 on repair. TV does not start up. I have checked the PSU and it seams to be OK. There seam to be problem on the main board.
    What I have tried…
    Well, there is +3V3-STANDBY coming from PSU to main board. This feeds up the main processor. This voltage has also been used to switch TV on. I have checked that switching signal from POWER ON button goes back to main board. But I did not check this whole path towards the processor as it is BGA package and it is covered by ceramic cooling plate.
    And here comes what is not clear to me.
    1. How to check if the main processor works? Does it work on the +3V3-STANDBY when TV is is standby mode?
    2. Can I somehow check if the PSU is working? May be by activating some pin?
    3. I have noticed by measuring (ohm-meter) some capacitors on the main board (in circles on the picture) that there is very low resistance on them (4.5ohms). In the scheme it is shown that these capacitors are on the 1V5 (1.5V) line. Is this OK? Basically it does not give much current as I = 1V5 / 4R5 = 333mAmps. What do you think? Certainly there are low voltage data parts (RAM. Processor …) connected and such resistivity might be correct….?....
    What I have also find that this 1V5 is split into 1V5M0 and 1V5M1. See the picture. I have removed the coils and measured resistance. Then 1V5M0 shows about 15ohms and 1V5M1 shows about 6,5ohms.

    Thanks Martin

    The service manual link:
    http://ulozto.net/xmFJspug/philips-ch-qfu1-1e-la-pdf




    #2
    Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

    https://www.youtube.com/watch?v=gylo_ILxq_0

    Comment


      #3
      Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

      Philips still have mainboard problems? ( Chip failure? )

      Happened also on the 9603 models , all had mainboard problems.
      I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!

      Comment


        #4
        Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

        Do you have more information please post it and how to solve the problem
        Not want to swap boards if can fix easy on the board!On the Q552,ELA
        Chassis mainboard is often a dc dc converter defect ST1S10BPH
        not necessary to swap the board!

        http://alpengeist-tvrepair.blogspot.de/ interessting mistake

        Greetings to all
        thoma!

        Comment


          #5
          Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

          Hi everybody,

          Sorry for digging up this subject but I know there are many Philips TVs with such problem (no start from standby) and actually I have one also. I've heard that problem might be with 2 epoxy covered chips on main board and repair is inpossible. Also replacing main board is worthless because replacement would probably die sooner or later. Has anyone have some info regarding this?

          Best regards

          Comment


            #6
            Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

            I found on e-bay a used replacement board about a year or so ago...bought it and installed it...TV is still working...I really didn't think about the used board failing...now I'm concerned as the Customer paid hefty for this repair...

            Comment


              #7
              Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

              Right now it's extremally hard to get this ssb replacement. Even Philips doesn't seems to have any (at least in Europe). It looks like it's the only possible but not permanent fix (ssb replacement). This is very bad.

              Comment


                #8
                Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

                Hi everybody, just reading this post after some time. In my case I was unsuccessful.
                I did not find the problem and gave up. The TV has probably been recycled.

                Comment


                  #9
                  Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

                  Hi All,

                  In my case problem was broken first 256 bytes of spi flash. Reflashing solve problem for now.

                  Comment


                    #10
                    Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

                    Hi dear member,
                    I read your topic about your problem with your Philips TV.

                    I have the same problem with my own TV.
                    I also measured the resistance across the 1V5 and it saw very low impedance 4.5Ω.

                    Did you repaired your TV?
                    Do you have any tips for me?
                    I do likes the picture on this TV and I really want to keep it.

                    Thank you very much for your help and time.
                    Regards,

                    Nataf10
                    Last edited by nataf10; 12-20-2017, 09:31 AM.

                    Comment


                      #11
                      Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

                      Originally posted by nataf10 View Post
                      Hi dear member,
                      I read your topic about your problem with your Philips TV.

                      I have the same problem with my own TV.
                      I also measured the resistance across the 1V5 and it saw very low impedance 4.5Ω.

                      Did you repaired your TV?
                      Do you have any tips for me?
                      I do likes the picture on this TV and I really want to keep it.

                      Thank you very much for your help and time.
                      Regards,

                      Nataf10
                      It's normal the impedance. Which is your problem?

                      Comment


                        #12
                        Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

                        Hi,
                        My problem is that the stby LED (red) blinks 2 times cyclicality.
                        Do you have an idea for this ERROR.
                        It's not the power supply for sure.
                        Thank

                        Comment


                          #13
                          Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

                          A 2 blink error I believe, is just the tv saying there is a problem but I don't think it gets far enough into its diagnostics to blink the actual code. being a Philips I would suspect ssb. I think there is a way to make the panel turn on but without a picture, that way you could eliminate the ctrl, ysus & Zsus
                          Last edited by R_J; 12-21-2017, 10:51 AM.

                          Comment


                            #14
                            Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

                            hi,
                            This is a LCD LED Display it is not a Plasma Display.
                            There are not Ysus & Zsus on LCD panels.

                            Comment


                              #15
                              Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

                              I see it's a lcd, I did'nt look close enough at the manual. My mistake

                              Comment


                                #16
                                Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

                                Seem like software problem

                                Comment


                                  #17
                                  Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

                                  nataf to know the complete code you must open the tv, shortcir. SDM pins and plug the AC cord, then you have to download the service manual and find what the lamp codes means, if it makes 5 long 3 short is probably a software problem (bad main firmware, not standby one).

                                  Comment


                                    #18
                                    Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

                                    There's a similar ceramic heat sink on the TV I am trying to salvage (42pfl6008k/12). The ceramic radiator doesn't have the two pins to keep it pressed to the CPU as visible on the photo above.

                                    I was able to detach it (unlike the top post says that it cannot be removed) by rotating it left / right without putting too much force. It gives in slowly and patience is required. Seems to be a sort of thermal adhesive tape, but it was badly positioned, only touching half of the CPU ...

                                    Comment


                                      #19
                                      Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

                                      Hi all!

                                      I have a similar issue with philps 42PFL7008S/12.

                                      At startup black screen, with follow led error:

                                      - Level1 -> error 2
                                      - Level2 -> error 53 (with SDM pin ground)

                                      On service manual they report "MIPS doesn't boot (SW cause)" on device SSB.

                                      I checked power supply pins (12V, 3,3V, 5V, 1,x V) but seems all ok.

                                      I connected the serial and I have the follow output
                                      0xF98A2ED3 cycle now
                                      Jump to 0xB5034100 02 key is used
                                      Getting Hash...
                                      0xBFC00000 01 10 00 00 52 55 00 0F 36 74 B3 80 00 00 00 00
                                      Hash:
                                      0xB5034570 1D 86 AE FF E3 71 65 8F 13 61 12 66 C4 5F 8D B0
                                      Buffer for BIG NUM is at B5034E2C, size is 0440.
                                      nand.c:nand_readwithinpage
                                      0x00000000 page is reading
                                      0x00000004 0x00000007 0x00000000 StartUnit/EndUnit/offset
                                      Reading out data:
                                      04 unit:

                                      waiting ECC result ready
                                      00 bits error in the unit.
                                      05 unit:

                                      waiting ECC result ready
                                      00 bits error in the unit.
                                      06 unit:

                                      waiting ECC result ready
                                      00 bits error in the unit.
                                      07 unit:

                                      waiting ECC result ready
                                      00 bits error in the unit.

                                      nand.c:nand_readwithinpage
                                      0x00000001 page is reading
                                      0x00000000 0x00000003 0x00000000 StartUnit/EndUnit/offset
                                      Reading out data:
                                      00 unit:

                                      waiting ECC result ready
                                      00 bits error in the unit.
                                      01 unit:

                                      waiting ECC result ready
                                      00 bits error in the unit.
                                      02 unit:

                                      waiting ECC result ready
                                      00 bits error in the unit.
                                      03 unit:

                                      waiting ECC result ready
                                      00 bits error in the unit.

                                      nand.c:nand_readwithinpage
                                      0x00000001 page is reading
                                      0x00000004 0x00000007 0x00000000 StartUnit/EndUnit/offset
                                      Reading out data:
                                      04 unit:

                                      waiting ECC result ready
                                      00 bits error in the unit.
                                      05 unit:

                                      waiting ECC result ready
                                      00 bits error in the unit.
                                      06 unit:

                                      waiting ECC result ready
                                      00 bits error in the unit.
                                      07 unit:

                                      waiting ECC result ready
                                      00 bits error in the unit.

                                      nand.c:nand_readwithinpage
                                      0x00000002 page is reading
                                      0x00000000 0x00000000 0x00000000 StartUnit/EndUnit/offset
                                      Reading out data:
                                      00 unit:

                                      waiting ECC result ready
                                      00 bits error in the unit.

                                      {preboot}
                                      <000>
                                      <010>
                                      <020>K


                                      The previous output is repeated 4 times, than blink led error message.

                                      A defect I found before current final black screen, is that in the past sometimes (specially in winter when low temperature) the backlight switch on and audio on, but no image. After 5 minutes (more or less), when I think components "hot", image startup.

                                      Have you any suggestion to repair? I've already replaced power board without any result.

                                      Do you suggest BGA main chip refusion?

                                      Regards

                                      Comment


                                        #20
                                        Re: Philips 40PFL7007K/12 does not power on - Chassis QFU1.1E LA

                                        I suspect theese series has spi flash problems...

                                        Comment

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