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    #1

    Philips 42 Plasma 4 Red light

    Hi

    Have been reading about Philips 42PF7320a/37 problems. Have one been trying to fix . Started with Red light flashing 7 times(front panel LED)
    Opened up found two 3300uf caps bad, replaced them with 3300uf 16v, put board back in. Pluged in TV hear click green LED on powersupply flash then go out. Front panel flashes 4 times, from what I could find code 4 = +5V protection active. Any ideas. I do have 35yr as electronic tech worked on Air force base navaids and ground radios.
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    #2
    Re: Philips 42 Plasma 4 Red light

    Originally posted by plafleursr View Post
    Opened up found two 3300uf caps bad, replaced them with 3300uf 16v, put board back in.
    What brand and series of capacitors did you use for replacements?
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      #3
      Re: Philips 42 Plasma 4 Red light

      I got them from Parts Express
      3300uF 16V Radial Mini Electrolytic Capacitor - Description

      High quality Xicon miniaturized capacitors utilize case sizes smaller than conventional general purpose caps while maintaining very high performance, low impedance characteristics, 20% tolerance, and an operating temperature of -40° to +85° C. Cap sizes larger than 8mm diameter utilize safety vents on rubber end seal.

      Comment

        #4
        Re: Philips 42 Plasma 4 Red light

        Originally posted by plafleursr View Post
        I got them from Parts Express
        3300uF 16V Radial Mini Electrolytic Capacitor - Description

        High quality Xicon miniaturized capacitors utilize case sizes smaller than conventional general purpose caps while maintaining very high performance, low impedance characteristics, 20% tolerance, and an operating temperature of -40° to +85° C. Cap sizes larger than 8mm diameter utilize safety vents on rubber end seal.
        That's not going to do it. You need high temperature, low ESR caps for that application. P12735-ND EEU-FM1A332 from Digikey is your best choice. A pair of them will set you back $5.00 with shipping.

        PlainBill
        For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

        Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

        Comment

          #5
          Re: Philips 42 Plasma 4 Red light

          Originally posted by plafleursr View Post
          High quality Xicon

          +85° C.
          As you can guess from the name of this website, folks here are "particular" about their capacitor selection and recommendations.

          Your problem could still be capacitor related. The caps you purchased are general purpose and 85C. A 85C cap won't last very long a plasma TV. Caps in the SMPS area require low ESR (ohms) capacitors. General purpose capacitors are not low ESR.

          Capacitors die from age, heat, and shoddy build quality. Capacitors DO NOT have to be visibly bloated in order to bad. They can be out of tolerance uF (a 1000uF measures 20uF) and/or have high ESR (ohm). A multimeter will be insufficient to test for ESR. For that you need an ESR tester which costs between $50 and $300.

          So the caps around the bloated 3300uF could also be bad but have no visible signs of bloating.

          Most members here will recommend that you replace ALL capacitors with reputable brands from reputable sellers. Brands like Rubycon, Panasonic, and United Chemicon are suggested. A list of recommended caps can be found at

          https://www.badcaps.net/forum/showthread.php?t=2280

          A picture of your boards will also help. Please note my signature for the proper method of attaching pictures.

          edit: PlainBill and I posted at the same time, 2:50pm. Looks like his ethernet connection beat my wifi! :-)
          Last edited by retiredcaps; 02-10-2011, 03:53 PM. Reason: edit: inside joke re wifi
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            #6
            Re: Philips 42 Plasma 4 Red light

            Originally posted by plafleursr View Post
            Opened up found two 3300uf caps bad, replaced them with 3300uf 16v
            PS. What is the original voltage of the 3300uF cap?
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              #7
              Re: Philips 42 Plasma 4 Red light

              Originally posted by retiredcaps View Post
              PS. What is the original voltage of the 3300uF cap?
              They where 3300uf 10V, read somewhere to up the voltage rating. Do you recommend same voltage 3300uf 10V. Will order more caps, have to bring TV home and will take picture of Powersupply board.

              Thanks

              Comment

                #8
                Re: Philips 42 Plasma 4 Red light

                Originally posted by plafleursr View Post
                They where 3300uf 10V,
                You can go up in voltage no problem. Order the Panasonic FM part that PlainBill recommended. Just keep in mind other caps on the board may also be bad.

                If it is a big hassle, don't worry about the pictures for now.
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                  #9
                  Re: Philips 42 Plasma 4 Red light

                  Originally posted by retiredcaps View Post
                  You can go up in voltage no problem. Order the Panasonic FM part that PlainBill recommended. Just keep in mind other caps on the board may also be bad.

                  If it is a big hassle, don't worry about the pictures for now.
                  This was a known problem with this TV. Samwah had a bad run of 3300uF, 10V caps that wound up in these TVs.

                  PlainBill
                  For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                  Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                  Comment

                    #10
                    Re: Philips 42 Plasma 4 Red light

                    I just brought TV home as it is my nephew's. Model 42PF9631D/37. I did find a couple of blink code list they have different answer for same # code. The green leds 8001 & 8002 come on and then go out after maybe 30 seconds. Front panel Led starts Green then gos out, when the 8001 & 8002 go out it turns Red flashes 4 then pause then repeats. On one of the codes lists I have 4 = +5 V protection active and other D3V3 OVP, UVP.
                    I plan on replacing Caps with one's sugested, just want to make sure of any thing else may need to replace, so can order all sametime.

                    Comment

                      #11
                      Re: Philips 42 Plasma 4 Red light

                      Originally posted by plafleursr View Post
                      I just brought TV home as it is my nephew's. Model 42PF9631D/37. I did find a couple of blink code list they have different answer for same # code. The green leds 8001 & 8002 come on and then go out after maybe 30 seconds. Front panel Led starts Green then gos out, when the 8001 & 8002 go out it turns Red flashes 4 then pause then repeats. On one of the codes lists I have 4 = +5 V protection active and other D3V3 OVP, UVP.
                      I plan on replacing Caps with one's sugested, just want to make sure of any thing else may need to replace, so can order all sametime.
                      Blink codes can be problematical on these sets. The published codes are for the latest versions of the firmware; if the firmware hasn't been updated you may get a different code. My best advice; replace the two caps with low ESR Panasonic FM or equivalents. If further troubleshooting is required, at least the power supply output is stable.

                      PlainBill
                      For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                      Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                      Comment

                        #12
                        Re: Philips 42 Plasma 4 Red light

                        I did this check from Philips Plasma repair . Checks V4 Power supply

                        1. Check Input Voltage Range of the defect
                        occurrence area is between 100V AC ~ 240V AC
                        2. Insert Jumper at J8003, J8004 BJ8902
                        3. Insert Power (AC) at CN8001
                        4. Check if the LED turn on or not as sequence.
                        (LED8001→LED8002→BD8903)
                        5. If all the LEDs (LED8001, LED8002, BD8903)
                        are ON, the PSU is not defective.
                        6. If one of the LEDs (LED8001, LED8002,
                        BD8903) is OFF, the PSU is defective.

                        The three leds where on.

                        Then I tried unplugging CN 1M46 from lower left hand side of PS, LEDs 8001,8002 stay on and fault. So maybe the SSb is bad or DC-DC converter. Just need to find Part number.

                        Comment

                          #13
                          Re: Philips 42 Plasma 4 Red light

                          I also checked all voltages on PS (VS,VA,VE,VSET,VSCAN,VG,D5VL,D3V3) all good (This was with the three jumpers as listed above) I think it is in SSB or DC-DC converter section.

                          Anyone have same type problem.??

                          Comment

                            #14
                            Re: Philips 42 Plasma 4 Red light

                            Ok I got replacement Caps for 3300uf 10v, as suggested. When I was putting power supply back in I found on LVDS or Logic main (board just below PS) cable number on PS is CN8006 (10 pin connector) cable that is at bottom and middle of PS (near D5V & D3V3 check points) I must have pulled it out when I remover PS the First time I replaced Caps, cable was taped to panel didn't see it loose.
                            THAT fixed problem.

                            Comment

                              #15
                              Re: Philips 42 Plasma 4 Red light

                              Originally posted by plafleursr View Post
                              THAT fixed problem.
                              Good eye. Now with proper 105C low esr caps, you should have a nice working unit for many years.
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                              Comment

                                #16
                                Re: Philips 42 Plasma 4 Red light

                                I am having the same problem. I replaced the 2 capacitors with the the same ones recommended but it still flashes 4 red lights. Could I have soldered them wrong?

                                Comment

                                  #17
                                  Re: Philips 42 Plasma 4 Red light

                                  did you watch your polarity? should be marked on board...
                                  Last edited by heavymachines; 01-20-2013, 08:39 PM.

                                  Comment

                                    #18
                                    Re: Philips 42 Plasma 4 Red light

                                    man i got exactly the same problem after i replaced the two caps,, i pulled without notice connector cn8006 and guess what,,, 4 lights blinking i read your post and yes the other side of the connector it was loose,, put it back and works !!!!!

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