Onkyo HT-R591 no video or audio at HDMI

tibimakai Master Tech Posts: 689	Onkyo HT-R591 no video or audio at HDMI Jun 15, 2019 15:14:12 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by tibimakai on Jun 15, 2019 15:14:12 GMT -5 I believe that those we have replaced with RN1441.

tjmotter
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Posts: 384

Onkyo HT-R591 no video or audio at HDMI Jun 17, 2019 15:34:55 GMT -5

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Post by tjmotter on Jun 17, 2019 15:34:55 GMT -5

I don't think so. I can't find them listed as interchangeable on any service manuals.

toshiba.semicon-storage.com/ap-en/product/bipolar-transistor/brt/detail.RN1405.html
toshiba.semicon-storage.com/us/product/bipolar-transistor/brt/detail.RN1441.html

There is a big delta on the Base Series resistance spec between the two (2.2K for the 1405 and 5.6K for the 1441) and the voltage spec. The RN1405 is readily available from Mouser (23 cents each).

tibimakai Master Tech Posts: 689	Onkyo HT-R591 no video or audio at HDMI Jun 18, 2019 10:02:10 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by tibimakai on Jun 18, 2019 10:02:10 GMT -5 I will have to wait, to have more parts to order and than I will order these parts. If I remembered correctly, the 47 Ohm resistors, it was very close to the 47 value. What if we "bypass" the relay?
	Last Edit: Jun 18, 2019 10:03:16 GMT -5 by tibimakai

tjmotter
Senior Member

Posts: 384

Onkyo HT-R591 no video or audio at HDMI Jun 18, 2019 20:19:20 GMT -5

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Post by tjmotter on Jun 18, 2019 20:19:20 GMT -5

Jun 18, 2019 10:02:10 GMT -5 tibimakai said:

I will have to wait, to have more parts to order and than I will order these parts.
If I remembered correctly, the 47 Ohm resistors, it was very close to the 47 value.
What if we "bypass" the relay?

Interesting idea but dangerous. If that is the area that is damaged this would be one way of confirming it but if something else is triggering the fault you risk smoking something. If you try this keep one hand on the power cord (because the power button isn't going to work)

tibimakai Master Tech Posts: 689	Onkyo HT-R591 no video or audio at HDMI Jun 26, 2019 10:11:49 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by tibimakai on Jun 26, 2019 10:11:49 GMT -5 I haven't checked yet, but other Onkyos use the same relay, like the 609, 717? I have these receivers. I'm thinking about trying out one from those and see, if it makes a difference.

tjmotter
Senior Member

Posts: 384

Onkyo HT-R591 no video or audio at HDMI Jun 28, 2019 14:40:13 GMT -5

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Post by tjmotter on Jun 28, 2019 14:40:13 GMT -5

Jun 26, 2019 10:11:49 GMT -5 tibimakai said:

I haven't checked yet, but other Onkyos use the same relay, like the 609, 717? I have these receivers. I'm thinking about trying out one from those and see, if it makes a difference.

yes, in my experience, they are all the same. One of those receivers will also likely have the same transistor as well.

tibimakai Master Tech Posts: 689	Onkyo HT-R591 no video or audio at HDMI Jul 1, 2019 17:00:20 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by tibimakai on Jul 1, 2019 17:00:20 GMT -5 The transistor, in the 717 is a DTC123JKA.

tibimakai Master Tech Posts: 689	Onkyo HT-R591 no video or audio at HDMI Jul 1, 2019 17:06:16 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by tibimakai on Jul 1, 2019 17:06:16 GMT -5 It shows, that is equivalent with the RN1405, so I guess the answer is yes.

tibimakai Master Tech Posts: 689	Onkyo HT-R591 no video or audio at HDMI Oct 10, 2019 23:59:05 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by tibimakai on Oct 10, 2019 23:59:05 GMT -5 I ended up replacing the relay, Q181 and R921 and it is still clicks on and off constantly. I have even went over the HDMI IC pins again. No change.

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