What should I do with a possible faulty AV receiver? - Page 1
Forum section: electronics / general

author: SeeNoWeevil
author_rank: Newbie
timestamp: November 27, 2018, 11:42:44 am
content: My Onkyo 828 recently sent a loud pop through the speakers and went into protect mode and would shutdown shortly after turning on. After a factory reset it seemed to work fine for a week or so and then started again sending loud pops/bursts through seemingly the rear channels (all devices), although not going into protect mode. The issue seems to be increasing in frequency. The debug information shows a 'V' which indicates the Voltage protection had been tripped. Cabling looks fine without any fraying etc around the plugs. Now, this unit is over 5 years old so is due an upgrade. Would it be unwise to connect a new reciever to these existing speakers/cabling or can I be fairly confident this is a problem with the receiver? Second question, am I wasting my time/money taking the thing to a repair shop in an attempt to get it repaired and sell it on? (A working unit is worth around £250 I think).This particular Onkyo isn't part of the extended warranty thing for HDMI board failures btw.Thanks

author: madires
author_rank: Super Contributor
timestamp: November 27, 2018, 12:44:10 pm
content: If you can't repair the receiver yourself and like to buy a new one anyway then donate it to a makerspace. Their might repair it or salvage the parts. Or do you have a friend interested in electronics?

author: CJay
author_rank: Super Contributor
timestamp: November 27, 2018, 01:20:24 pm
content: Quote from: SeeNoWeevil on November 27, 2018, 11:42:44 amIt's probably worth nowhere near as much as a repair shop will want for repairing it so unless you're happy to get your hands dirty and learn by doing then advertise it as faulty/spares repairs or donate it to someone who's interested.Personal opinion, the speakers and cables are probably OK but I would check the entire cable and not just the connector ends.

author: cdev
author_rank: Super Contributor
timestamp: November 28, 2018, 05:48:39 pm
content: Old Onkyo products were among the most solid consumer grade receivers out there. They were definitely worth fixing.Is it a TX-NR828? Thats what a Google for Onkyo 828 brings up.https://www.eu.onkyo.com/en/products/tx-nr828-93025.htmlWithout looking into the manuals or trying to find a service manual (thats your job) going into power protection mode sounds like a possible power supply or capacitor problem. There definitely is nothing wrong - yet - with the core components. But some part is likely on the verge of failure or possibly some relay or heatsink needs cleaning.. or perhaps some battery needs replacement -Not knowing anything about the unit, I would strongly suggest you try to apply some simple logic to figure out what is happening.Its doubtful if the unit is fairly new, but maybe a cap needs replacement. If you could get a service manual that will probably have a procedure you can follow based on the diagnostic info you have.Something has likely drifted off of spec and the receiver which has some self-protection circuitry did its job and protected itself.So whatever needs fixing its likely something fixable and likely fairly easy to identify with the aid of a service manual.