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Onkyo tx sr 607 -New DSP chip installed

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    Onkyo tx sr 607 -New DSP chip installed

    Hi i recently got Onkyo rx sr607, the problem was it have no sound even in any mode, then i checked the DSP chip, i found that it getting very hot, so i suspect there some internal short inside, I ordered new chip same part number and i replaced yesterday, But sill have no sound , i checked the voltage rail it is in limit as per schematic 1.2 volt and 3.3 volt. but when i am checking the DSP version on Display its showing D: ??/ ????????? like that .. i will appreciate anyone help on this

    #2
    Re: Onkyo tx sr 607 -New DSP chip installed

    I wonder if the DSP chip might have some internal EEPRROM / flash memory, where it has (or should have) some ID and/or configuration data programmed...
    Khron's Cave - Electronics - Audio - Teardowns - Mods - Repairs - Projects - Music - Rants - Shenanigans

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      #3
      Re: Onkyo tx sr 607 -New DSP chip installed

      DSP Chip itself have internal ROM? .. i saw a NAND flash ic near by it

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        #4
        Re: Onkyo tx sr 607 -New DSP chip installed

        I can't be sure, but i wouldn't be surprised. Either way, i'm pretty sure (detailed) datasheets can't be found for those custom(?) chips.

        That being said, if it has a flash chip nearby, that could be part of the problem too.
        Khron's Cave - Electronics - Audio - Teardowns - Mods - Repairs - Projects - Music - Rants - Shenanigans

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          #5
          Re: Onkyo tx sr 607 -New DSP chip installed

          HI... good news.. i kept in on condition this onkyo more than two hours after that i just checked the dsp firmware version ,,, success in display its shwoing the version.. but i dont know how it came..i connected speakers and i got sound,, but i restarted the again but its gone.. again display shows bunch of questions mark in dsp firmware.. but now i am kept it on condition

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            #6
            Re: Onkyo tx sr 607 -New DSP chip installed

            what will be the cause for it

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              #7
              Re: Onkyo tx sr 607 -New DSP chip installed

              Hi ,,, i sort out the problem now .. the problem wass improper soldering ,, one pin of DSP chip ws not solderd properly ,,i soldered it again now its ok:musics

              i reach a conclusion now ,, there is no flash rom inside the DSP chip itself

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                #8
                Re: Onkyo tx sr 607 -New DSP chip installed

                Thanks for the update. I may have the same soldering issue than, with my TX-NR609. Most likely, I haven't done a good soldering job. It was my first DSP IC soldering job.

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                  #9
                  Re: Onkyo tx sr 607 -New DSP chip installed

                  i think your DSP is BGA right?.. in TX SR607 not BGA, ok do soldering and and let me know the result,

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                    #10
                    Re: Onkyo tx sr 607 -New DSP chip installed

                    SRT1, are there any other BGA chips on your board?

                    To me, seeing that it works after a few hours of idle time makes me think that there is a thermal issue, like a bad solder connection which expands and makes connection after the PC board warms up.

                    -Ben
                    Muh-soggy-knee

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                      #11
                      Re: Onkyo tx sr 607 -New DSP chip installed

                      Originally posted by ben7 View Post
                      SRT1, are there any other BGA chips on your board?

                      To me, seeing that it works after a few hours of idle time makes me think that there is a thermal issue, like a bad solder connection which expands and makes connection after the PC board warms up.

                      -Ben
                      no other bga related to sound processing . my problem was bad soldering of dts chip ..

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                        #12
                        Re: Onkyo tx sr 607 -New DSP chip installed

                        were you able to fix the dts chip?

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                          #13
                          Re: Onkyo tx sr 607 -New DSP chip installed

                          Originally posted by Badee View Post
                          were you able to fix the dts chip?
                          What you mean

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                            #14
                            Re: Onkyo tx sr 607 -New DSP chip installed

                            How do you check your firmware version? I can't find that info. Thanks

                            never mind, I kept holding the display button...
                            Last edited by St969; 05-21-2018, 01:41 PM.

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