Onkyo HT-R690 AV Receiver Front Right Channel Not Working

[sfernandes]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

But I do appreciate and thank you for spending your time with me and I appreciate sharing your knowledge. What I'm going to do with it is take the HDMI board out because it works good. Replace the caps on it for prevention of issues and heatsink the DSP then take my bosses unit and just install it for him for free since he has an Integra with the same HDMI board that's faulty and the rest of the unit I'll throw away.

[sfernandes]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

Even though I got to the ic I don't feel like going any further with this project because I agree it's not for a beginner. I repair TV's all the time, but not at board level unless it's capacitors and did one ic once with a heat gun and a flux pen. TVs are a little different in my opinion because you have your common faults you usually know what it could be because of understanding what each board does and how it works etc. I guess I was kinda hoping this was like a common fault kinda like the notorious HDMI board issues that plague these. But this issue could be a combination of things lots of components could of killed each other etc

[sfernandes]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

here is the beloved IC

[sfernandes]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

Ok I got the bottom off

[budm]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

I'm assuming I have to strip it down transformer has to come out heatsink all that since its all screwed to the bottom. Then it has to be built on a bench with no chassis to test. It's the only way I don't see any other way.

Good clear pictures of the bottom of the chassis?
Pictures of the top view of the internal of the unit?
You may have to do that since there is no PCB layout to see if the signal path can be probed from the top side of the board.
It is not going to be easy, but that is how you learn to figure out the way to test the circuit.
I paid my due spent hours, days, months on some complicate stuff before so for me to transfer you the 40 years of knowledge to the beginner just from the pictures and typing without the unit in front of me is almost impossible.
When you spend lots of times on your own and finally figure it out how to solve the problems at hand on your own, you will remember that for the rest of your life.
You can some time spends hours just to figure out how the signal gets from point A to point B from 50 pages for the schematic, and then have to find where the parts are at on the actual board.
So if you think you will be spending a couple hours figure this thing out, you can forget that.
And when you get to the test [ont you still need to learn how to use the mACV meter as the tool to test the audio signal since you do not have the scope or the Audio tracer.

[budm]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

I'm looking at those pages I can't see any relation. The first page shows how the unit comes apart and the others is a block diagram and a schematic.

Page 7 block diagram showing #BAAF-0621 for the audio section where Q4001 is.
Page 10 shows the diagram U0010/BAAF-0621
Page 2 shows exploded View where U0010 is.
Page 53 show the list of PCB/PCBA.

[sfernandes]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

I'm assuming I have to strip it down transformer has to come out heatsink all that since its all screwed to the bottom. Then it has to be built on a bench with no chassis to test. It's the only way I don't see any other way.

[sfernandes]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

Ok then I guess I know where it's heading tomorrow morning lol

[budm]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

Is this ic on the bottom? Do I have to strip this thing down? If so how would I test it? Build it on my carpet with no chassis?

I do not know I do not have the unit or the board in front of me but you now know where the board is so now you need to figure out how to get to it to look for the IC and how to get to it to test it.
If it is going to be easy for beginner then every body can do it, but it is not for beginner.

[sfernandes]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

I'm looking at those pages I can't see any relation. The first page shows how the unit comes apart and the others is a block diagram and a schematic.

[sfernandes]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

Is this ic on the bottom? Do I have to strip this thing down? If so how would I test it? Build it on my carpet with no chassis?

[budm]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

Well look at page 2, page 7, page 10, page 53 and see how they all are related to each other.

[sfernandes]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

So what are you saying? I'm not understanding. I'm looking at the manual at the pages you told me.

[sfernandes]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

I have the manual open on my laptop next to the unit.

[budm]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

PDF page 2 Exploded view # U0010.
PCB Part list page 53, Q4001 listed on page 56.
You NEED to look at the service manual.
I looked at 130 pages.

[sfernandes]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

Ok found it. It's called BCAF 0621 no wonder I couldn't find it. I'm happy I looked for the numbers instead. So I'm assuming this IC is in the bottom correct? If so how is it possible to probe it playing audio with the whole unit apart and all boards disconnected?

[budm]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

Audio input, it has connectors p5502b, 5503b, 5504b, PDF page 10.

[sfernandes]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

Well not all, but I looked at every board I don't see any with the name baaf

[sfernandes]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

All my boards start with bchdm

[sfernandes]

Re: Onkyo HT-R690 AV Receiver Front Right Channel Not Working

I don't see any board by that name. What's on this board? Is it the HDMI board?