Better: Yamaha Ca-r1 Service Manual

Official Japanese Owner's Manual: Available directly from the Yamaha Japan Archive.

• Measure bias voltage on output transistors; adjust per manual.
• Replace leaky coupling capacitors in signal path.

Typical specifications (representative)

• Power output: (stereo) ~10–20 W per channel into 8 Ω (check actual label).
• Frequency response: ~20 Hz–20 kHz.
• Tuner: AM/FM with preset memory.
• Inputs: phono (MM), aux, tape; outputs: speaker A/B, tape out.
• Power supply: mains transformer with rectifier and smoothing capacitors.