Question about Onkyo 7.2 Channel Network A/V Receiver - TX-NR838

1 Answer

My Onkyo TX-NR838 switches off when I turn the tv off. I can't switch the receiver back on for 2 days

Unplugged the av receiver, waited 20 minutes, tried again. Reset the receiver. This allowed me to turn on & off until I turned the tv off

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Sounds like a faulty cable or psu .... or some bad solders on the back of a scart socket if you use scart
if not its something to do with TV detection the TX-NR unit uses

Posted on Dec 04, 2014

  • Rod Cornelius Dec 07, 2014

    Thanks simeon. How do I view your full answer as I onlo got up to...unit uses?

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1 Answer

How do I troubleshoot my Onkyo AV Receiver TX-SR603?


Based on your account it appears that you may have an issue with the power supply of the receiver.

Jun 13, 2016 | Onkyo Audio Players & Recorders

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I have a onkyo TX-NR616 receiver which has now for some reason has no sound when fist switched on, however if left on for about 15 minutes then turned off and straight back on again then after a few s


There is an extended warranty coverage that Onkyo is providing on receivers manufactured between 2009-12. Not sure if the TX-NR616 is included, but here is a thread from the AVS forum on the problem:

Onkyo acknowledges failed units and extending warrranties until 2018 AVS...

Feb 07, 2015 | Onkyo Audio Players & Recorders

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We have a tx-nr515 reciver and cant get sound from tv but everything else working fine?


Try plugging the TV into the AUX on the back of the receiver. If you get sound from the tv when you switch to AUX on the front of the receiver, then you know the tv is ok. You may also try connecting your CD player to the TV input on the back of the receiver, switch it to TV on the front of the receiver and if you have CD sound from the tv selector, then the receiver should be ok. Helps narrow down where the problem is. You may have to set the tv to enable its audio outputs in the TV's menu. It might not be putting out any sound until that setting is enabled.

Jul 27, 2014 | Onkyo TX-NR515 AV Receiver

1 Answer

Onkyo TX-LR552 was working great until I hooked up the tv to act as a set of speakers. It cut off and now won't cut back on. We've unplugged it for a day and still nothing....


Could be a couple things.
1. The system has a safety feature that cuts out when to much voltage runs through input/outputs
2. The audio ouputs have fried and will need all new capacitors installed.

May 10, 2009 | Onkyo TX-LR552 6.1 Channels Receiver

2 Answers

Muffled sound from rear speakers why watching TV


switch the HDMI cables around to make sure its not one of them, if the problem is one of them it will move with the cable,if no change i would suspect the coaxial cable next.

Feb 12, 2009 | Onkyo TX-SR506 Receiver

1 Answer

Onkyo AV Receiver turning off - by its self.


The space you have provided should be enough. If this is a new unit and still under warranty, I would request warranty service. It sounds like the unit is entering protect mode. This may be due to heat or it could be because of a defect in the protect circuit. In any case, this should not happen that quickly.

Update this if not under warranty and I'll provide a list of diagnostic tests to help determine the problem.

Dan

Jan 16, 2009 | Onkyo TX-DS787 Receiver

2 Answers

Reciever turns off


Powering off usually points to issues with speaker setup. You should read pages 42 and 96 of the 606 manual.

Page 42 covers impedence settings. Check your impedence settings for your speakers. The 606 handles speakers from 4 to 16 ohms. There are two impedence settings on the 606 - 4 ohms and 6 ohms. Set to 4 ohms if your speakers are 4 ohms or more but less than 6 ohms. Set to 6 ohms if your speakers sit between 6 and 16 ohms. Incorrect settings can result in the 606 going into power protection after prolonged use or at higher volume.

Page 96 covers testing for unexpected power protection. You should switch off your AV at source and leave for an hour. Disconnect all cables to speakers and other peripherals (TV, DVD et al). After an hour turn on AV and turn volume to MAX, If the AV remains on, turn down volume to min, switch off AV and reconnect all devices. Make sure the speaker cables are properly connected and that no bare wiring is exposed.

Once you have done this switch on the AV and turn to volume to MAX. If the AV stays on then problem solved. If the AV switches off then you should contact your supplier.

Nov 24, 2008 | Onkyo TX-SR606 Receiver

1 Answer

Onkyo TX-SR605 conected to Mitsubishi DLP TV


What I think I did and how I fixed it!

FACTORY RESET ON EVERYTHING!



All you have to do is to do a factory reset on everything, but I thing mostly on your 605, but I would do it on the TV as well. I think what had happened is after I set everything up for the first time, it worked great. As the days when on I started to play with all of the futures the 605 and the TV had to offer. I was turning them on and off to see what everything did. What I think I did was, I turned on something in the 605 that the TV did not know how to cope with. If I had to guess, I think it is the Lip-sink feature (Spelling?) in the 605.

Anyway disconnect everything, look in your manuals of the TV and the 605 to see how to do the factory reset on both. Then turn your TV on. After it does it’s start up for the first time (again), start connecting the 605.

It has been working great for me after I did this. Do not count on help from the people you bought it from or the people who made it. This stuff is so new they do not really know how to fix it.



Robert…

Jan 04, 2008 | Onkyo TX-SR605 Receiver

4 Answers

No display on my sr875 the next time i turned it on..i have no clue waht happend..it was just working fine yesterday,now, it suddenly shows one issue that needs to be resolve..i did everything i cud do but...


The 10 Ohms resistor R9304 in series with the the 44V display power supply was open.

How to find it:
Remove the to cover.
On the right hand side of the front panel you will see on the side a wide white flat cable going toward the back of the receiver.
Beside it is a 4 black wire band connecting the front panel to a 3x4cm power PCB which is parallel with the front panel inside the receiver (attached to the front frame).
It has visible on the left side a diode bridge and a fuse - above the fuse you can find the R9304, a SFR16 package (1x3.5mm) marked BrownBlackBlack.
Check continuity.Replace if open wit a 1W resistor
Good job ONKYO, save 1/3 of a penny...

For the DIY:
As an added step I replaced the R9304 with a 2W 47R resistor, replaced the series transistor regulator Q9301 (tall TO92) with a bigger package (isolated TO220) and one of the two series 22V zenners from the base - D9310 - with a 10V one.
Output voltage drops from 44V to 34V, display is slightly dimmer but overall stress is down.

Good luck!

Dec 14, 2007 | Onkyo TX-SR875 Receiver

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