You have already pointed out the problem:
Problem is Det.Protect: I.
How to fix :
(1)download 545/535/525 service manual.
(2)check all power transistors CE & BE resistances
if theyy are very low ,0 ohm, or infinity.
(3)check all 0.22 ohm resistors if they are open
or turning greater.
(4)Check the biasing circuit with a small rating
transistor and an orange color variable resistor.
(5)Check all channels.
SOURCE: onkyo ht-r500 no speakers attached goes directly
I have a HT-R520 - First thing stated in the manual is 'Do Not Apply Power to the System Until All the Speakers Are Connected to the Receiver.' This practice avoids any hot connects to the speakers. As with any high-outpiut system connecting spreaker wires to the system while in operation can spike the speakers as well as the amplifier curcuits. Hook up your speakers first and give it a try. Good Luck!
SOURCE: I have a new house that had speakers built into
you can check them with a ohm meter, hook it to the wires that you hook to the reciever and if you get a reading it is good if no reading it is bad wires
SOURCE: I have four Bose 161 speakers and an Acoutismass 5
you're going to need a ohm meter (good electrical testers have them) and make sure ohm ratings from speakers match the ratings for your receivers. Sounds like to much resistance for receiver(s)
SOURCE: Onkyo 545 one channel don't work
Use headphones or
Computer Speakers
and plug in to your headphones jack.
If the audio is present on both channel , check your speaker system
or the jack circuits.
If symptoms are the same, follow the troubleshooting on the link
above.
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