Question about Onkyo TX-DS898 Receiver
When the Onkyo is switch on and the tuner was selected there is a great chance it starts normal. But moste of the time there is no sound on the speakers. Al relais are working and when I wait (5min, 10 min, or much more) suddenly it works. When I switch to another input channel it starts al over, no sound and when you wait long enough the sound will come. The pre-amp is working, I have sound on the outputs like the tape-output. I see that de fan is NOT working until the sound appears on the speakers, then it works. I have the service manual and have tried the adjustment and confirmation procedure. The voltages mentioned are correct, the relais are working normal but the test of the DC detection circuit doesn't work. Measuring is very difficult or even impossible so I hope that someone knows the reason of my problem. Many thanks.
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There is a good chance that a common control may have developed a high-resistance or 'dead' spot through idleness and is causing your symptom. Turn the POWER OFF and operate every control throughout its range a number of times, especially rarely-used ones like Tape Monitors and the Mute control.
Turn the volume to something reasonable and see if that helped.
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