Panasonic SA-BT230P Service Manual page 82

Step 5 Remove 1 screw.
Step 6 Twist the Wire Holder.
Step 7 Release Red(TL10) & Black (TL20) wires from the Wire
Holder.
Step 8 Remove AC Inlet P.C.B. from Rear Panel.
Step 9 Twist the Wire Clampers to release 6P cable (SMPS
P.C.B. to D-Amp P.C.B.) & 10P cable (SMPS P.C.B. to Main
P.C.B.).
Step 10 Remove 5 screws.
Caution: During releasing of the P.C.B. Spacer, avoid
touching the electrical components.
Step 11 Release P.C.B. Spacer by using long nose plier.
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