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    JBL Home Cinema Problem - advice?

    Hey everyone, hope you are all good.

    All i seem to do here is bring problems

    Ok, i have a lovely but old JBL ESC333 home cinema system that I had retired as it developed a fault bt upon replacing it with an Onkyo HTX22-HDX, I realised that i am going to struggle to get the thunder that this produces without some serious outlay. The Onkyo was quite simply, limp in comparison. I mean this JBL thing would remove your lungs at 20 paces

    So, Onkyo duly sold on, I am setting out to fix the brute. hopefully with your help team.

    So, the initial problem started to be irksome and was most certainly not a show stopper......i was only able to turn the volume on the system up and not down with the remote. Its one of those systems that has basic functions on the unit itself and most of the complicated adjustments were done via the remote, but these all worked, just nto the volume down.

    The system itself has a little remote eye that plugs into the main unit and this was bought new, nto so long ago directly from JBL (Harman)

    This minor itch developed into HATRED so I ended up just putting the whole system into storage until now.

    Now, when i try anything from the remote, it doesnt work at all. Its one of those wee credit card remotes so there isnt much scope to pull it apart and see inside either.

    I did however check it out in front of a camera and could see the little IR light flashing, all with anew battery but still, it wouldnt do anything to the unit, even if basically touching the IR receiver eye.

    Would appreciate any thoughst on testign the actual output of the remote or likewise, testign what the little receiver eye is putting out in response to the ir signal.

    The receiver eye plugs into the main unit using what looks like a 3 pin headphone jack.

    Look forward to any and all suggestiosn team

    Cheers
    Andy

    #2
    Re: JBL Home Cinema Problem - advice?

    In all likelyhood there are multiple issues here. Lets start with the remote not working:

    Inside the unit shoud be a small silver can that will contain the IR receiver. This should be located near the front of the unit. There should be 3 leads for this part. Try resoldering these leads first. That may resolve the remote problem as these joints are a general issue.

    Once that is done, please update this with an accurate description of the original problem that got worse.

    Dan

    Comment


      #3
      Re: JBL Home Cinema Problem - advice?

      I agree, but I normally resolder the whole board on the remote.

      I have taken these apart even though they are sometimes glued together.

      The remote gets thrown around a lot and often needs re-soldered. (The heavy components crack the solder joints)

      The flashing led is a good sign.

      I would look for another remote (feebay)

      The credit card remotes are hopeless for the most part.

      Old JBL to me says fix me and keep me.

      The new stuff is junk!

      Comment


        #4
        Re: JBL Home Cinema Problem - advice?

        On the remote receiver, one leg will be ground, one will be the B+, and one will be the output. Put your meter in AC mode and monitor each pin to find out which one is the output pin, you should see the readout on the meter jumps around on one of the pin when it receives the signal from the remote, signal will not be big, but if you have a scope, then you will see better signal wave form.
        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


          #5
          Re: JBL Home Cinema Problem - advice?

          Hi,

          OK, dropped a few pics here for you to see, sorry if they are huge. Still getting to grips with a cyanogenmod touch pad.

          The original failure was that the remote wouldn't turn the volume down, that's all. This is what made me originally think that it was a remote issue. Common sense would have suggested that at that stage, I look at the ir sender in front of a camera to see if there was an output but I didn't do that I'm afraid.

          However, all remote functions seem to be putting a signal out right now

          Could it be that this is just garbled?

          I should also clarify that I am far from being good with electronics but as ever, I am keen to learn and have a go

          But bear in mind, I have the soldering skills of a gorilla on speed :-)

          I do have a solder station though just not a very fine tip, will try to source one today

          I must say that the solder joints on the ir receiver look OK, no dry joints or cracks that I can see with the naked eye

          Regards
          Andy
          Attached Files
          Last edited by jinjur; 08-03-2012, 01:26 AM.

          Comment


            #6
            Re: JBL Home Cinema Problem - advice?

            OK, so I took my little (cheap) multi meter to the ir receiver last night.

            I found that the middle leg of the IR receiver component seemed to be earth, correct me if I am wrong.

            So, I set my multi meter to 200v ~ which I am assuming is AC?

            OK, with black in the centre pin and red on the top pin, I saw about 11.4 v with no change upon the remote being pressed

            With black on the centre pin and red on the bottom pin, I saw 11.4 again which dropped to 8/9 when the remote was pressed

            Does that sound like normal behaviour for an IR receiver?

            Sorry for all of the possibly thick questions too :-\

            Andy
            Attached Files

            Comment


              #7
              Re: JBL Home Cinema Problem - advice?

              Originally posted by jinjur View Post
              OK, so I took my little (cheap) multi meter to the ir receiver last night.

              I found that the middle leg of the IR receiver component seemed to be earth, correct me if I am wrong.

              So, I set my multi meter to 200v ~ which I am assuming is AC?

              OK, with black in the centre pin and red on the top pin, I saw about 11.4 v with no change upon the remote being pressed

              With black on the centre pin and red on the bottom pin, I saw 11.4 again which dropped to 8/9 when the remote was pressed

              Does that sound like normal behaviour for an IR receiver?

              Sorry for all of the possibly thick questions too :-\

              Andy
              Try measuring it using the DC setting.

              Another possibility is that there could be a loose connection in the wire/connector that connects the remote receiver to the amp. Over time bad connections usually get worse and worse. Ofc, capacitors will too.
              Muh-soggy-knee

              Comment


                #8
                Re: JBL Home Cinema Problem - advice?

                I use AC mode on 2VAC scale, if you see changes every time it sees the remote signal, then that is an output pin, black probe should be on the metal chassis. Basically, it is seeing IR signals from your remote.
                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


                  #9
                  Re: JBL Home Cinema Problem - advice?

                  Originally posted by budm View Post
                  I use AC mode on 2VAC scale.
                  A cheapo 830B type meter will only have 200v and 750v AC scale. He's gonna need a better meter. The 890G is a good cheapo workhorse.
                  Originally posted by PeteS in CA
                  Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                  A working TV? How boring!

                  Comment


                    #10
                    Re: JBL Home Cinema Problem - advice?

                    Sounds like he needs to spend more money to do electronics troubleshooting.
                    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


                      #11
                      Re: JBL Home Cinema Problem - advice?

                      If all other functions or buttons of the remote worked except for the volume in one direction then it will most likely be the remote keypad or button pad/ button on the remote.

                      This is not uncommon and you should be able to find a good all in one remote that will program to the JBL unit.

                      I have cleaned remotes with some luck in the past (pepsi syndrom) that had key pad issues.

                      Sorry for not listing that sooner as another possible cause.

                      Comment


                        #12
                        Re: JBL Home Cinema Problem - advice?

                        Hi gents, I appreciate what you are saying re: the equipment I am using but honestly for all of the use it would get, buying extra equipment isn't an option.

                        I'm here for sincere help, so please, quips like "blah...he needs to spend no money" and smart arsery as such......don't bother.

                        Now, I dropped the meter to the DC setting and I say the same behaviour albeit with power values of 5 ish volts.

                        So, if the top pin maintains steady voltage and the bottom fluctuates, we are saying the it receiver is behaving as expected?

                        Does this start to shift blame to the remote or the processor within the unit itself?

                        How likely is it that the remote will be putting out a faulty signal but a signal nonetheless?

                        A

                        Comment


                          #13
                          Re: JBL Home Cinema Problem - advice?

                          Sorry cad....I pulled the remote apart and it is minty fresh inside

                          Comment


                            #14
                            Re: JBL Home Cinema Problem - advice?

                            Originally posted by jinjur View Post
                            How likely is it that the remote will be putting out a faulty signal but a signal nonetheless?

                            A
                            Likely. The ceramic resonator or crystal could have cracked and now it's working on the wrong frequency. I have a remote for my Samsung TV that didn't work anymore after it was dropped. It definitely puts out a signal, but the TV doesn't pick it up. A new remote worked fine.
                            Originally posted by PeteS in CA
                            Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                            A working TV? How boring!

                            Comment


                              #15
                              Re: JBL Home Cinema Problem - advice?

                              Ahhh, interesting bud.

                              I may just pony up for a new one as its only 20 pounds and take it from there

                              Cheers
                              A

                              Comment

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