eto ung pinakamalapit na nasearch ko hehe...
http://www.avsforum.com/t/1431671/possible-diy-fix-for-onkyo-tx-nr3007-loss-of-audio-audio-problem-without-sending-the-unit-to-onkyoI recently obtained a TX-NR3007 that i believe was having the same common loss of sound issue most folks are discussing on this thread:
http://www.avsforum.com/t/1192172/the-onkyo-tx-nr3007-tx-nr5007-common-questions-issues-hints-answers-threadSummary:
The receiver was exhibiting what i believe was this common problem. It was no longer under warrantee. I reflowed the two BGA chips on the hdmi board, and it now appears to be working.
Symptoms:
Lack of audio
Communication issues requesting firmware version from DSP controllers
Communication issues with using ethernet port
Communication issues with using USB port
Fix:
Reflow of BGA Chips
Assurance it doesn't happen again:
Insure proper cooling to unit (plenty of clearance around cooling intakes and outlets)
Possibly heatsink the two chips
Followup:
Interested in results from others willing to/interested in doing this.
Interested in folks willing to donate their broken receiver for me to diagnose/try to fix (I would pay shipping)
More details as they become available at
http://www.c-j-l.net/Home/audio/onkyo_tx-nr3007The Full Story:
The initial symptoms for this amplifier reported by the old owner was a lack of audio.
Upon further investigation I found that it could not communicate properly with the DSP units or ethernet; When requesting to see firmware version, it would only display '
-?
?' or similar (all question marks) for DSP1/ETH, DSP2, and DSP3. (To do this, with unit on press and hold display, press the standby button, and immediately use the < or > arrows next to the display button) This indicated to me that there is a communication issue on-board.
Futher troubleshooting showed that it would not pick up an IP address via network (under hardware setup, network did not even exit), and when a USB memory stick was inserted and source changed to USB, the stick was never queried (LED on stick never lit).
I decided this really seemed to be a communication issue.
Looking at the internals of the unit, the HDMI board which most service centers replace as a fix for the problem is the digital mainboard containing what seems to be most of the processing units. This would explain the 600+ dollar cost that has been reported if not under warrantee, i believe.
Two of the chips on the board were in BGA (
http://en.wikipedia.org/wiki/Ball_grid_array) form factor- which with poor cooling has been noted to cause problems in northbridge and video chipsets in laptops as well as the famous red halo of death in xbox 360s.
Using some suggestions and timing from
http://www.youtube.com/watch?v=vR8L3B3eDr0 , I re-flowed the two chips on the board that were BGA.
The amplifier appears to be working properly now (can play music from USB, check for firmware upgrades on the network, i can see the firmware versions of all chips, etc), although i haven't done thorough diagnostics on it. I am waiting to get the remote from the original owner.
I will post more information and pictures as i have a chance to update them here:
http://www.c-j-l.net/Home/audio/onkyo_tx-nr3007If your amplifier is exhibiting these types of symptoms and you'd like to donate it for me to try to fix and report results, i'd be happy to pay shipping slow-boat to where i live in Oregon. Please PM me.
[Edit/Addendum]
I re-flowed a second board and was a bit too hot on it. Melted the front HDMI cable input and the power inputs. If using the heat gun method, keep an eye on these plastics. Board still worked, which was good- but could not use front HDMI input.
If you don't have a heat gun, or want a way that is more regulated, you could try the method described here by oscarav098 in an oven:
http://www.avsforum.com/t/1192172/the-onkyo-tx-nr3007-tx-nr5007-common-questions-issues-hints-answers-thread/4620#post_22813395(synopsis:
Procedure:
- Cover HDMI board with aluminum foil with the exception of the BGA chips. There are a total of two BGA chips on the HDMI board for the 3008 receiver. You can identify these chips by the lack of visible pins.
- Warm up oven to 300 degrees F and place hdmi board on cookie sheet and insert in oven. Bake at this temp for 2-3 min.
- Raise temp to 385 and bake at this temp for 8-9 min.
- Turn oven off and open door. Let board sit for 30 min. Do not touch.
- Remove from oven. Remove foil and re install.
- Enjoy you newly working receiver. )
