Akai Amplifier Service Repair

I was worried my Akai AA-5800 Stereo Integrated Amplifier from 1973 was on its way out, luckily a look under the hood shows its in excellent condition!

Power output: 45 watts per channel into 8Ω (stereo)
Frequency response: 10Hz to 50kHz
Total harmonic distortion: 0.1%
Input sensitivity: 1.2mV (mic), 3mV (MM), 150mV (line)
Signal to noise ratio: 53dB (mic), 65dB (MM), 75dB (line)
Output: 150mV (line), 25mV (DIN)
Semiconductors: 42 x transistors, 2 x IC, 10 x diodes, 2 x varistor, 3 x SCR
Dimensions: 432 x 143 x 330mm
Weight: 11.5kg

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