Onkyo tx sr 607 -New DSP chip installed

[srt1]

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

[Khron]

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...

[srt1]

Re: Onkyo tx sr 607 -New DSP chip installed

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

[Khron]

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.

[srt1]

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

[srt1]

Re: Onkyo tx sr 607 -New DSP chip installed

what will be the cause for it

[srt1]

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

[tibimakai]

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.

[srt1]

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,

[ben7]

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

[srt1]

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

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

[Badee]

Re: Onkyo tx sr 607 -New DSP chip installed

were you able to fix the dts chip?

[srt1]

Re: Onkyo tx sr 607 -New DSP chip installed

were you able to fix the dts chip?

What you mean

[St969]

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...