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If you want to connect output of Sony STR-DE525 to input of Pioneer CX-770. Then connect Video/Audio out (or Tape Rec Out) of Sony to CD/LD-VCR input of Pioneer.
Do you hear any clicks? If not, the standby transformer or related circuitry is bad. If you hear 1 relay click...the audio output section is most likely the problem. The first click you hear is the main power relay...and should see display.. the second relay click is the protection circuit relay engaging to let audio to your speakers...if the second click is not heard (it should occur in 3 to 5 seconds) there are shorted output transistors or a shorted output IC trying to blow your speakers with 50 to 75 volts dc. The protection circuit monitors the speaker lines for voltage. They should always read milli-volts only...not even 1 volt.Anyway, good luck
Most likely the amp for that channel is defective. If memory serves me correctly, there is a small amp chip mounted on the heatsink that is for both the left and right rear. I would change that first. It should have about 5-7 pins.
nothing is connected at this time no speakers or in puts.....
posible component failure???? any common check points..this thing is pretty webbed with them
The voltage of the fuse is not the issue. It sounds like you may have some blown internal transistors (probably in the output area). Time for a trip to the repair shop I'm afraid.
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