Pioneer QX-646 Receiver Repair - Distorted Sound Output

This is a repair video for a Pioneer QX-646 receiver. I took this project for helping the owner who doesn’t feel comfortable to do the repair work by himself. In the beginning, I thought the problem was caused by the I/O coupling capacitors. After the testing and circuit analysis, It was the blown fuses caused power outage for power transistors. I’d like to share this video to other DIY fans if they have same issue as this one.