Sony STR-DB790 Receiver "protective short circuit" Questions

all lights operate on front panel but no output to the speakers Hello, your unit is in "protect" mode. The protection circuit is activated to protect your speakers from a shorted output IC or output ...

...short circuit. This could also happen on the back panel of the receiver where wires are plugged into each terminal. Basically, PROTECTED MODE display occurs to protect system from getting harmful ...

...short in the speaker wire or one of the speakers, but! if the protection circuit comes on with "the speakers and wires dis-connected" it means there is a short in the audio outputs in the receiver ...

...check speakers cables for internal short circuit-short circuit between cable and cable near it-defective speakers(short circuit in speaker coil)-trouble in receiver output stage(workshop

...circuit. Remove all speaker wires from the receiver and turn it on. If it still goes into protect, I'll bet the house that one of the channels is shorted out and it needs repair. This is a job for a ...

...circuit!?). If so you have to check all the output transistors for short cct, if shorted you must also check all the DC bias cct nearby such as small transistors,resistors...If you are not familar ...

...to a faulty bias or there is a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the amplifier comes out of the protect mode then check for short on the

can't open,in protect mode Hi: First disconnect all speakers from the unit and then try turning the unit on too see if it still goes to protect mode. Protect mode is a shut down feature that shuts

...of the protect mode then check for short on the speakers.If the set does not power from the standby the processor IC and allied circuit must be checked. Check the +5 rail to the processor to

...short circuit, how do i repair It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be with ...