When I press the stand-by button to turn the unit on it turns on then as soon as you hear the speakers click in it goes into protection mode. This is even with everything removed and the unit sitting on a bench stand alone.
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Re: Onkyo TX-DS777 goes straight to protection mode
Hello.You have shorted audio outputs. One of your channels has shorted output transistors. If your unit uses output ICs then one of them is shorted. Both types ( individual transistors or ICs ) are located on the large finned heat sink. The parts are available from http:\\www.tritronicsinc.com. good luck
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Are the speakers selected for A or B or AB check the speakers by using a 1.5 volt batter on the cable going to the speakers, if you get a sound from the speaker, you know they are ok, if not, speakers are faulty.
This is most likely a "protect" mode. A problem has been detected and the unit shuts down to prevent further damage. The most common cause of this are defective output transistors. Plan on a parts cost of $25-$40 for this repair.
This indicates that the system is going into protect mode. First disconnect all speaker wires (with the power cable disconnected). Then turn the unit on and see if it sill shuts aff ofter a few seconds. If it does not, then you have a problem with the speakers or speaker wires. inspect the wires at both ends for frayed strands that may touch. If that all lookd good, plu the speakers in, one at a time, until the problem reappears. Be sure to turn the sytem off before plugging in any speaker just to prevent any accidental short which could be catastrophic. If the system goes into protect mode with all speakers disconnected, you probably have a shorted output transistor.
The unit is in protect mode. A problem was detected in the final stage of the amp and the unit shuts down to prevent further damage to either the amp or speakers. Check the speaker wires to be sure that they are not crossed anywhere. If with the sepaker wires disconnected, the amp still enters protect mode, the problem is internal to the amp. This is usually defective output transistors. Expect a parts cost between $15-$40.
The problem is not with the inputs. This unit is in protect because a problem has been detected in the output section. Try disconnecting the speaker wires and turning it on. If the unit remains on, there is a short in one of the speaker wires. If the unit still shuts down, there is an internal problem that will require repair. It sounds like this is a new piece. If so, it should be covered under warranty.
disconnect all speaker leads at the unit,power it up then see if it'll stay on. if it does, reinstall one speaker lead at a time until it goes into protect mode. that speaker line will probably have a short in it. Just run a peice of skr wire straight from the unit to the sspeaker in doubt, hooks em up see what happens. if it shuts down have that skr ckd.if it works, just rip out the old shorted line and run new stuff.
When power was intermittant, were there any other discrepencies or audible power deprivation to the speakers?
Your problem has many possibilites from fuses to major amplifier problems to common power supply failures. Being intermittant then dead may still be a simple fix, but not without some physical intervention of test gear.