Refresh maintenance has been completed! The fresh, fresh tone has returned. The tone with a high sense of transparency and texture shows how much Yamaha applied power at that time. The built-in solid state and DC amplifier configuration, can be switched between grade B and grade A, and the eye-catching VU meter is also one of the attractions. Small scratches corresponding to the year, Kusumi are seen (Shota Sasaki)
Maintenance information: 2022.7.29 Maintained (replaced due to defective relay. The semi-fixed resistor, fuse, fuse resistor, micro SW, spark killer had deteriorated, so I replaced it. All SW and VR were completely disassembled and cleaned. Input waveform confirmation, load test (1kHz sine wave, 8Ω load: Class A 30W+30W, Class B 120W+120W, OK) sound output test.)
2016.1.26Maintained (transistor, heat dissipation sheet, meter lamp, semi-fixed resistor, electrolytic capacitor, fuse, output relay, RCA terminal, speaker terminal replacement. Resolder components on the board. SW, VR, RCA terminal cleaning Offset, idle measurement adjustment. Check the input/output waveform. (Sound output test.)
Accessories: manual copy
Main specifications: Output 30W+30W (grade A) 120W+120W (grade B) size W461 x H170 x D360 mm weight 20 kg