Onkyo HT-R690 AV Receiver Front Right Channel Not Working

[sfernandes]

Hello,

The front right channel is not working on this one. The receiver does not go into protect mode, it's working fine on all other channels. I checked all the nobel resistors and they checked out ok. The Transistors im assuming are ok or else the unit would go into protect mode. The problem is not the HDMI board as I have put this HDMI board into another unit and all channels worked.

Any ideas anyone?

[budm]

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

Service manual:


Do you have scope to trace where the signal gets lost? Looking for signal from speaker protection relay back toward the input.

[sfernandes]

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

Service manual:


Do you have scope to trace where the signal gets lost?

No I don't have a scope all I have is a Fluke Multimeter

[budm]

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

So you have more than one unit that allow you to swap the boards?
You may be able to use in mV AC mode to trace out the audio signal.

[sfernandes]

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

So you have more than one unit that allow you to swap the boards?

Not at this time. I did have one here for repair of a faulty HDMI board which I fixed up and I decided to do that swap to see if this one im asking about had a bad one, but the channel worked find in the other unit. The units were not the exact model numbers, but had similar HDMI boards just one had less HDMI's than the other. The other boards looked different.

[budm]

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

Well, you now have the diagram and the AC mV meter, so start tracing out from the output back to the input. Feed audio into Front Left and Front right then use the meter to look at the signal of the working channel and compare it to the non-working channel. It can be a simple as bad connection or bad speaker relay contacts, etc.

[sfernandes]

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

Well, you now have the diagram and the AC mV meter, so start tracing out from the output back to the input. Feed audio into Front Left and Front right then use the meter to look at the signal of the working channel and compare it to the non-working channel. It can be a simple as bad connection or bad speaker relay contacts, etc.

Any idea what do I measure? what components? where do I start? I have never done this kind of diagnostic before?

[budm]

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

Read the schematic is the start, you need to be able to read the diagram to be able to trace the signal paths on the unit based on the diagram, form output back to input if you know what that means.
If you are a real beginner and want to tackle something this complex it is not going to be easy for us to hold your hands on every steps.
So tell us what your experience is first.

[sfernandes]

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

Read the schematic is the start, you need to be able to read the diagram to be able to trace the signal paths on the unit based on the diagram, form output back to input if you know what that means.
If you are a real beginner and want to tackle something this complex it is not going to be easy for us to hold your hands on every steps.
So tell us what your experience is first.

I would say for something like this im a beginner. The most I have ever done is replace capacitors at board level. I cant even make sense of the schematic. Maybe I should throw the unit away, I dunno at this point.

[sfernandes]

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

Do you think it's possible you or someone walk me threw this?

[keeney123]

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

Do you think it's possible you or someone walk me threw this?

If you are going to repair these things you need to be able to read a schematic. Otherwise you will just be guessing. You could fix a problem and later on it could occur again because the cause of the problem was not fixed. Do you have any experience with OHM's Law?

[keeney123]

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

The first place you would begin is on the block diagram on page 4 of manual that Bud M supplied. You will need to know what he ask you from that page. That is tracing from the output to the input. This is kind of like a flow chart.

[sfernandes]

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

If you are going to repair these things you need to be able to read a schematic. Otherwise you will just be guessing. You could fix a problem and later on it could occur again because the cause of the problem was not fixed. Do you have any experience with OHM's Law?

Unfortunately I don't know Ohms law. Maybe this is way beyond my scope. Would be nice if I could get it going. I will look at the schematic and see if I could make sense of it.

[keeney123]

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

Unfortunately I don't know Ohms law. Maybe this is way beyond my scope. Would be nice if I could get it going. I will look at the schematic and see if I could make sense of it.

I am sure their on online explanations of OHM's Law. This would be in a beginners course. You could learn this as it would help your understanding what you are doing. Kind of learn as you go. That is if you have a interest in learning this. Otherwise, you should rely on a technician to troubleshoot your equipment as you can get harmed with this stuff if you do not know what your doing. The Block Diagram I referred you to is not a schematic.

[budm]

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

Per block diagram, the Headphone jack is BEFORE the Front Left, Front Right speaker relay, so use the Headphone to see if you do get the sound of both channels through the headphone or not.

[sfernandes]

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

I am sure their on online explanations of OHM's Law. This would be in a beginners course. You could learn this as it would help your understanding what you are doing. Kind of learn as you go. That is if you have a interest in learning this. Otherwise, you should rely on a technician to troubleshoot your equipment as you can get harmed with this stuff if you do not know what your doing. The Block Diagram I referred you to is not a schematic.

I repair TV's all the time not knowing ohms law and not knowing schematics. I guess receivers are different.

[sfernandes]

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

Per block diagram, the Headphone jack is BEFORE the Front Left, Front Right speaker relay, so use the Headphone to see if you do get the sound of both channels through the headphone or not.

I will check that and get back to you within the hour.

Thank you

[sfernandes]

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

Per block diagram, the Headphone jack is BEFORE the Front Left, Front Right speaker relay, so use the Headphone to see if you do get the sound of both channels through the headphone or not.

Ok I had a look and threw headphones same issue I just get the left channel but not the right. I noticed if I crank it to max with the headphones or even a speaker connected I get very faint distorted audio on the right channel. I'll wait to hear back from you guys on the next step.

[sfernandes]

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

Anyone have any clues what to check next? I'm guessing it's not relay related since the headphone jack is before the relay and the headphone jack has the issue as well.

[sfernandes]

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

Bump up