Harman Kardon HK-3490 Receiver - a little of the Repair and maintenance process 

Harman Kardon HK3490 -AV Stereo Receiver 2010' - Specifications:
Tuning range: FM, MW
Power output: 120 watts per channel into 8Ω (stereo)
Frequency response: 10Hz to 110kHz
Total harmonic distortion: 0.07%
Input sensitivity: 200mV (line)
Signal to noise ratio: 95dB (line)
Speaker load impedance: 8Ω (minimum)
Digital inputs: coaxial, optical
Video Connections: composite
Dimensions: 442 x 163 x 382mm
Weight: 10.4kg
Accessories: remote control
Year: 2008-12

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