Post by mastertech on Apr 25, 2015 16:45:35 GMT -5
Well we got a little side tracked with a couple emails but it has been repaired. We ended up testing all the supply rails and they were ok. Then tested a couple safety transistors and they were ok. Then JB noticed a funny looking trace and after I looked at the picture we determined the trace was damaged. So he repaired the trace and all seems well again.
most of the stuff is pretty obvious, clean up supply lines, alter gains, change op amps, bypass limiting circuits not really necessary etc.
Biggest thing is set up.
Perhaps, but it's the precise combination of all those parts that yield the end results. If just one thing is out of order it really can diminish the results. As I've stated publicly before I was skeptical of MP's stuff a few years back but Craig really encouraged me to meet up with Mike. After seeing his stuff in person and in my machine there's a big difference in performance. I don't think I could go back to stock boards.
At any rate, this process was a great learning experience and I really appreciate all of the help from Mastertech. It's a lot more satisfying to repair your own board then have to send it out
karilla: Hello! I'm sorry to bother you! I'm interested in fixing Error 0-81. can you solve it?
Apr 15, 2021 5:24:32 GMT -5
wildone: I don't think the B chip is at fault. The lead-free manufacturing process and solder balls used are more likely the culprit as the BGA still works after reballing
Feb 26, 2021 8:06:43 GMT -5
trloki: Hi Todd, Same problem Onkyo TX-NR646, any help on how to fix it plz?
Feb 25, 2021 1:35:18 GMT -5
btrial: poppabradj I have the same problem with Pioneer VSX-1131, after uprating firmware through NET. Now I cannot access neither NET nor Bluetooth, and also updating through USB doesn't work giving 0-81 error. If you have found any fix let me know.
Feb 7, 2021 15:37:42 GMT -5
poppabradj: Hello Everyone, I have a Onkyo TX-NR656 Can model and it's giving me error 0-81 when I try to update from a USB... I think i have corrupt firmware, becasue I had no access to NET, Bluetooth feature. The On screen display never Error 0-81 now.. please Help
Jan 7, 2021 21:33:29 GMT -5
gjaky: Hi Craig, Why do you need it? I mean with multi channel amplifiers all channels are the same, it is usualy possible to find at least one working channel so you can identify (or at least guess) component values for repair
Nov 16, 2020 2:53:07 GMT -5
craigr: Actually, I have been unable to find schematics or a service manual for the Lexicon LX-7 or LX-5 amps. Of anyone has a copy I would highly apreciate it.
Oct 31, 2020 15:28:59 GMT -5
analogrocks: Those are pretty pictures! Set one up running a ps1 or NES and sell them as retro gaming projectors. OR post them to me. Just put the stamps in the corner. Should make it just fine
Aug 28, 2020 16:28:01 GMT -5
iwwy1969: Hi all. Nice forum. I have Onkyo TX-NR616 no sound and no usb access. I have 5v at usb. I found that oscillator close to DSP is not working. It has no voltage feed from DSP. During the testing through display DSP shows version D??? .
Jul 13, 2020 8:25:33 GMT -5
lfcfan: Hi Todd, have been reading endlessly about the topic, and I really don't think that I'll be capable to 1. do the job myself as I don't have enough of the right equipment, and it looks like only the people who have access to TI exclusive distribution networ
Apr 9, 2020 17:17:06 GMT -5
skydronelink: Thank you I advance
Jan 29, 2020 4:01:41 GMT -5
skydronelink: Hi Repairaj, I have the same issue, but I am not able to get the cap value, I can tell it is the same board but deffirent rev cause of the side CAP is not the same value ! any idea how I can get the right burnt cap value?
Jan 29, 2020 4:01:31 GMT -5
skydronelink: Hello Jerme, thank you for the those images, is there is any chance to get the C2 (Cap) value or an image for it ? Thank you in advance.
Jan 27, 2020 23:15:06 GMT -5
skydronelink: Hello Sergio, I have the same issue, but I am not able to get the cap value, did find out what is the cap value?
Jan 26, 2020 18:01:17 GMT -5