I have a Yamaha RX-V367 receiver. I had an accident with a TV Box that apparently shorted the HDMI input and fried the digital board about 10 years ago. I kept it.
Recently I tried to revive it with a scrap digital board I got from ebay. The receiver now displays the typical dead DSP behavior: no speaker icons, "TI BUS: Boot" and blank "TIVer" in the self-diagnostic mode, etc. Evrything else seems to work fine (the FM radio locks into stations, the selected HDMI input is routed to the output, the audio inputs can be routed to the output, etc.).
The seller of the board, assuming he's telling the truth, said the replacement board was tested (I don't really know what that means) and it was working. I updated the firmware (that was painful, since the receiver is old enough that it doesn't have a USB port, it has to be done through the SPDIF input and a CD) but that didn't change anything either, although the receiver informed that the update was successful and the correct firmware is displayed with the self-diagnostic mode.
I did measure the voltage of the regulators that feed the DSP (that's as far as my skills go) and they seem to be fine (3.3 V and 1.2 V).
A few questions:
1. Am I missing anything else I could try? I think I've exhausted the possibilities and it's in fact that the board has a dead DSP.
2. Is the DSP replaceable? The service manual says the DPS is TMS "D70YE101BRFP266", but all available DSP chips say TMS 320D70YE101BRFP QFP144. Are these the same or at least compatible? I'm attaching a picture but I don't know if that's enough to identify a replacement DSP.
3. Should the "Analog bypass" in self diagnostic mode work even is the DSP is dead? It's not working in my receiver (no speaker icons in the display, no sound). My question is because if it should still work, then something else is fried.
Should I just dump the receiver in the trash?
I'm in Argentina and these kind of receivers are extremely rare, while people ask insane amounts of money for them (like about u$s 500). So I'm very reluctant to just throw it away but and it's not easy to replace it either.
Any help/advice will be welcome!
Recently I tried to revive it with a scrap digital board I got from ebay. The receiver now displays the typical dead DSP behavior: no speaker icons, "TI BUS: Boot" and blank "TIVer" in the self-diagnostic mode, etc. Evrything else seems to work fine (the FM radio locks into stations, the selected HDMI input is routed to the output, the audio inputs can be routed to the output, etc.).
The seller of the board, assuming he's telling the truth, said the replacement board was tested (I don't really know what that means) and it was working. I updated the firmware (that was painful, since the receiver is old enough that it doesn't have a USB port, it has to be done through the SPDIF input and a CD) but that didn't change anything either, although the receiver informed that the update was successful and the correct firmware is displayed with the self-diagnostic mode.
I did measure the voltage of the regulators that feed the DSP (that's as far as my skills go) and they seem to be fine (3.3 V and 1.2 V).
A few questions:
1. Am I missing anything else I could try? I think I've exhausted the possibilities and it's in fact that the board has a dead DSP.
2. Is the DSP replaceable? The service manual says the DPS is TMS "D70YE101BRFP266", but all available DSP chips say TMS 320D70YE101BRFP QFP144. Are these the same or at least compatible? I'm attaching a picture but I don't know if that's enough to identify a replacement DSP.
3. Should the "Analog bypass" in self diagnostic mode work even is the DSP is dead? It's not working in my receiver (no speaker icons in the display, no sound). My question is because if it should still work, then something else is fried.
Should I just dump the receiver in the trash?
I'm in Argentina and these kind of receivers are extremely rare, while people ask insane amounts of money for them (like about u$s 500). So I'm very reluctant to just throw it away but and it's not easy to replace it either.
Any help/advice will be welcome!
Attachments
It probably has a direct or 'pure direct' mode that will bypass the DSP. You can try that. You can also try a factory reset to see if that helps. Otherwise to troubleshoot further, you need to scope the signal path to/from the DSP and look at the control signals to/from the DSP to make sure they are as expected. Also check the DSP reset and clock. If indeed it is faulty, do you have the skills and equipment to replace it? (since you have another board with possibly good DSP).
The analog bypass is supposed to be like the 'pure direct' mode but I still don't get any sound through the amp and speakers or speaker icons on the display. That's why I'm asking if anybody knows if that mode really bypasses the presence of the DSP. If that's the case, then something else may be wrong but it seems to me all other symptoms point towards a fried DSP.
I have a friend who can do the DSP swapping. All soldering I've done resembles more the work of a butcher than a technician, so I wouldnt trust myself with such a delicate job.
Thanks for the response!
I have a friend who can do the DSP swapping. All soldering I've done resembles more the work of a butcher than a technician, so I wouldnt trust myself with such a delicate job.
Thanks for the response!