Yamaha Rx-a2a Service Manual __hot__ -

: No microphone signal; ensure the YPAO microphone is firmly connected.

Once you replace the transistor, the manual provides a Bias Adjustment Procedure : Connect a voltmeter to test points, turn the trimmer pot (VR101) to achieve 15mV as specified on page 42. Skipping this step will cause distortion or immediate re-failure. yamaha rx-a2a service manual

: 100 W per channel (8 ohms, 20Hz-20kHz, 0.06% THD, 2ch driven). : No microphone signal; ensure the YPAO microphone

, including the 7 HDMI inputs and specialized outputs like the Zone2 pre-outs and sub-woofer connections. Power Distribution : No microphone signal