Question about Onkyo Quartz Synthesized Tuner Amplifier Ri Model Tx-840 Remote Control

1 Answer

Speaker buttons don't function correctly

This is a pretty old receiver, but I just started having this problem (or at least just noticed it): The only time I get sound is when Speaker B is "On" and Speaker A is off. When I turn Speaker A "on" and Speaker B "off". When I hit both speaker buttons to "On" position, no sound comes out. So I am only getting sound out of speaker B. I want both sides of the stereo!

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  • Onkyo Master
  • 33,326 Answers

The Speaker A and Speaker B buttons select pairs of speakers. If you have connected a pair of speakers to the "SPEAKER A" terminals on the rear of your Onkyo receiver, you will hear stereo sound when the Speaker A button is pressed on the front panel. If, for some reason, you wanted to connect a second set of speakers in the same room or perhaps another room you would connect those speakers to the "SPEAKER B" terminals on the rear. Pressing both buttons on the front panel would send sound output to both sets of speakers

Posted on Jan 17, 2013

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Posted on Jan 02, 2017

  • 5 Answers

SOURCE: Settings

As mentioned, I have got to the bottom of this without Onkyo's help. I replaced the offending component, which is a 5.5V 0.1F backup capacitor. This is mounted on the front PCB, just below the right hand side of the display. It is a right pain to get to. Here briefly is what to do:
1: Unplug (really important!), remove top cover.
2: Undo three screws underneath front panel edge, pull off volume and tone knobs, and gently pull off metal front panel from the bottom, which is held with sticky tape inside.
3: Undo five screws from plastic front panel and free it. You will now have limited access to the front panel PCB and audio processor PCB.
4: Cut a few black cable ties as required to gain better access to front PCBs, and unplug ribbon cable from right hand side. It may be helpful to undo the nut and so release the volume control encoder.
5: Still struggling with poor access, release the standoffs from the audio processor PCB and unplug its ribbon cable. You have to remove the audio processor PCB in order to get to the screws under it. You may want to remove the PCB for holding the mains switch.
6: Now with some kind of access to the whole of the front panel PCB, undo 10,000 screws which secure it to the black plastic front panel.
7: Now with limited access to the front side of the front panel PCB, locate the capacitor, towards the right hand side of the display, just beneath it. Note the polarity; the negative terminal goes to the left/top pcb land, positive to the bottom/right. Desolder and replace this component. HINT: Make life easier for next time and mount the new part on the REAR of the PCB, so now negative will be down. Care with polarity!
8: Reassemble carefully. Make sure that the volume control encoder metal clasps are tight as they come apart easily. Fit new cable ties in original locations (important to prevent hum pickup).

The parts you will require then are about 6 nylon cable ties, and a 0.1F 5.5V capacitor. I had to make do with a 0.047F part because it was all I had to hand and I didn't want the machine in bits while I ordered one. Many of these components today are radial PCB mounting, which are not an ideal fit but could be used at a push. If you can get a vertically mounted one, that would be better. The nearest I can readily find is from RS Components item 377-350 (Panasonic EECS0HD104V), and the leads on this could doubtless be re-jigged to fit.

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Posted on Mar 09, 2008

SOURCE: Speaker volume settings

I figured out the problem.  After you set the individual channel volume for each speaker you need to push the test button on the remote and this will lock in the settings.  Thanks.

Posted on Oct 25, 2007

SOURCE: Sound not coming from left side surround sound speaker or my right side front speaker

it is highly likely that you're TV is outputting mono sound, hence the left channel only. check your physical connections to the TV and the balance / channel volume on the television as well.

Posted on Aug 28, 2007

  • 151 Answers

SOURCE: I have a Onkyo 805

WILL TRY TO GET A SOLUTION FOR YOU IN MORNING CALL ME ON 02870342354 LARRY. I HAVE NOT SEEN THIS ERROR BEFOR AND I SELL ONKYO IN THE SHOP I WORK IN,(LIGHTING,SOUND,AND VISION) IN NORTHERN IRELAND OR EMAIL ME AT LSVNI@YAHOO.CO.UK

RICKY.

Posted on Jun 20, 2008

lynchms
  • 93 Answers

SOURCE: Powered Or Unpowered Subwoofers For Onkyo TX-8511

Greg- Powered subs are better than non-powered subs (also known as passive subs), anyway I see the TX-8511 has no sub pre-out on the back panel, so you need to decide what sub you will use and run from the receivers left and right speakers output into a subwoofers speaker in from speakers then back out to speakers, look at the back of a subwoofer and you will see like 4 sets of speaker hookups 2 in and 2 out, what this does is takes the low end or bass and drops the signal to the subwoofer then takes the mids and highs out to your left and right speakers, unless your regular left and right stereo speakers have large woofers a sub is the way to go.

Posted on Jan 28, 2009

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