Tuner. Nothing exceptional here. All soldering looks good, nothing loosed.
Here's where Technics design team have messed up. Dropped the ball.
They have made this connection to look like it can be pulled apart, where in fact, it is not possible.
This connection is more likely to appear as the result of dreaded "overload error" that the cause of it.
Other that that, board looks quite all right, no apparent fault visible to the naked eye.
Why would they construct the receiver without ground wire incorporated into power supply cord?
Does that makes any sense?
Overload error might just come as result of that kind of thinking.
If you look at the service manual, the unit is meant to ground by every user individually, connecting the ground wire at the back of the panel.