Home Theater Questions? Ask a Technician for Answers ASAP
Hi and welcome to JustAnswer, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.Initially and to avoid asking you to do something you've already tried, can you please tell me what / any and all troubleshooting / specific steps you've already attempted ?
Unfortunately, Premium Service / Phone Calls only work with US numbers. Apologies for any inconvenience.
Still, have you considered / tried a RESET ?
Consider a RESET. A reset is both a test and a try of a fix. As it implies, a reset would force the unit to revert back to factory defaults removing glitches and config errors but would include memories, presets and user preferences. After a reset, the initial setup would have to be performed. If have not been done and should you venture to try: Please click / tap HERE.
May have to be done a number of times.
This is very critical - a reset however would not be corrective of an internal hardware concern; but it would be confirmed. In some instances, it may even expose/cause other issues.
And can you please try plugging in a pair of headphones? ...a couple of times; i.e. plug-in / unplug...plug-in / unplug
Yes as this would be the standard 6.3mm (US ¼ TRS) plug.
The headphone jack has a hidden speaker cut-off switch hence the headphones would serve for test purposes.
Still and to my understanding, the Australian version has a Direct and/or Pure Audio mode. Can this be tried please?
In some versions, there would be a PURE AUDIO button above the headphone jack.
Sorry, don't understand; "...How does that go? It currently is recognising a local station..."
Display OFF is to be expected.
PURE AUDIO off, can you try Listening Mode / Direct?
As it would be be an internal hardware issue, are you then considering/attempting a DIY (do-it-yourself) repair approach? If yes, do you have access to and familiar with a multi-meter and even perhaps a soldering iron?
Great on the DIY!Please post back with clear pictures of the internal circuitry. Click HERE.These pictures would then serve as common references.
The site limits file sizes to 5MB or less
Try imgur or Dropbox
Post back with the direct links to where the pictures where uploaded.
Appreciate the picture.
Still, let's try check and review the basics. Proposed preliminary tries (if have not been done):
A friendly reminder: voltage measurements by its very nature requires that the unit be plugged in and turned on. It is therefore LIVE! Please exercise due care and caution.
Incidentally, was this TX-NR509 working before?
...or was it tried to be repaired / modified in some way?
Have you at least checked the 2 fuses ?
The primary suspect would be the two (2) STKs power pack IC modules attached to the aluminum heatsink.
Only if comfortable with, check for the presence of +/-56.2V @ pins 1 & 2 of each IC pack using the chassis as common ground.
A word of caution; it would be very easy to accidentally / inadvertently short the pins with the metal portion of the multi-meter's test prod.
"sound cards"???, the 2 black IC modules? ...possibly.
Again only if comfortable with: