Onkyo receivers are infamous for bad caps on the HDMI board. This is my second Onkyo where this has happened in just a few years, and I've been aware of the issue for a while now (as it has taken several attempts to get it to work for a while). The reason I'm writing this is because I haven't really considered the problem to be anything else, even though theoretically it could be.
I'm confident enough that bad caps are to blame to just replace them as the first course of action.
A short description of the issue: For a while (some months) it's been difficult to switch input source, or to get the input source relays to "click in" when turning the receiver on. I've had to do it up to 4 or 5 times before it would actually work. In addition to that, the DLNA client on the card (a tiny embedded Linux) have been generally unstable freezing and rebooting a lot in the same periode - to the extent that the DLNA client hasn't really been usable. Even if I got it to start playing some media, it would usually freeze or reboot within the first minute.
The issue is isolated to the HDMI board, analog audio is still working. It doesn't help me much though, since all my sources are HDMI. It's also the HDMI board that has the bad caps issue for some reason, so I'm guessing Onkyo buys them from another place. These cards are very hard to come by second hand (since the failure rate is veery high within 5 years or so), is out of production and are quire expensive even if they were still for sale, so a repair is pretty much the only viable solution.
I've removed the board, taken pictures and notes of the instriptions on the electrolytes. I've had a different model Onkyo with the same problem before that I managed to find a description of which capasitors to replace and with what online. I haven't been as fortunate this time around though, and I have no idea which one(s) are bad. All caps are surface mounted, and some are quite small and in tricky places so I'm a bit worried about soldering in some of them without making it a disaster zone, but unless someone here has some more insight as to which ones are the likely culprits I'll just have to change them all.
There are quite a few different types, and I'm not sure what the all inscriptions mean. They all have "3 lines" of text. The first line usually has a letter followed by a digit with a horizontal line printed on top. I'm assuming that's some kind of tolerance/quality value. The second line is just a number, I'm assuming it's the capacitance but there are no letters indicating kilo, micro, nano etc behind the numbers so I'm unsure how to interpret this. The last line seems to be the rated voltage as it ends with a "V" on most of them, but not all.
My complete list is:
Some are very small with weak print so I can't be 100% sure I've read correctly, but I think I got it right. I first and foremost need help assuring that I have "sane" values.
There's also quite a few caps there, and I'm expecting most of them to be ok (even if they all seem to be of the same manufacturer which means that's probably just a matter of time). I'm worried that replacing all those can become quite costly and increase the chance for a soldier mistake by me quite a lot, so any input about what's the best course of action is appreciated.
I'm appending the service manual if anyone should be interested in looking at that. The card is called U005 HDMI CIRCUIT PC BOARD (BAHDM-0132-1B) in the service manual.
I'm confident enough that bad caps are to blame to just replace them as the first course of action.
A short description of the issue: For a while (some months) it's been difficult to switch input source, or to get the input source relays to "click in" when turning the receiver on. I've had to do it up to 4 or 5 times before it would actually work. In addition to that, the DLNA client on the card (a tiny embedded Linux) have been generally unstable freezing and rebooting a lot in the same periode - to the extent that the DLNA client hasn't really been usable. Even if I got it to start playing some media, it would usually freeze or reboot within the first minute.
The issue is isolated to the HDMI board, analog audio is still working. It doesn't help me much though, since all my sources are HDMI. It's also the HDMI board that has the bad caps issue for some reason, so I'm guessing Onkyo buys them from another place. These cards are very hard to come by second hand (since the failure rate is veery high within 5 years or so), is out of production and are quire expensive even if they were still for sale, so a repair is pretty much the only viable solution.
I've removed the board, taken pictures and notes of the instriptions on the electrolytes. I've had a different model Onkyo with the same problem before that I managed to find a description of which capasitors to replace and with what online. I haven't been as fortunate this time around though, and I have no idea which one(s) are bad. All caps are surface mounted, and some are quite small and in tricky places so I'm a bit worried about soldering in some of them without making it a disaster zone, but unless someone here has some more insight as to which ones are the likely culprits I'll just have to change them all.
There are quite a few different types, and I'm not sure what the all inscriptions mean. They all have "3 lines" of text. The first line usually has a letter followed by a digit with a horizontal line printed on top. I'm assuming that's some kind of tolerance/quality value. The second line is just a number, I'm assuming it's the capacitance but there are no letters indicating kilo, micro, nano etc behind the numbers so I'm unsure how to interpret this. The last line seems to be the rated voltage as it ends with a "V" on most of them, but not all.
My complete list is:
- a1 100 16V (2 pieces)
- E3 10 16V (2 pieces)
- E 22 4 (8 pieces)
- E4 220 4V (10 pieces)
- E3P 470 10V (4 pieces)
- E2 220E CD (4 pieces)
- F1 100 4V (4 pieces)
- E3 4.7 50V (1 pieces)
- Z3 100 16V (2 pieces)
- C4 220 10V (1 piece)
Some are very small with weak print so I can't be 100% sure I've read correctly, but I think I got it right. I first and foremost need help assuring that I have "sane" values.
There's also quite a few caps there, and I'm expecting most of them to be ok (even if they all seem to be of the same manufacturer which means that's probably just a matter of time). I'm worried that replacing all those can become quite costly and increase the chance for a soldier mistake by me quite a lot, so any input about what's the best course of action is appreciated.
I'm appending the service manual if anyone should be interested in looking at that. The card is called U005 HDMI CIRCUIT PC BOARD (BAHDM-0132-1B) in the service manual.
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