Panasonic SB-WA520GC Service Manual page 9

Step 9: Release the connector CN506 then pull out the entire
Power Amp unit.
Steps 10 & 11: Remove all the screws.
Step 12: Release the connector CN507 to remove the rear
panel.
· Checking for the Power and AC Inlet P.C.B.
Step 13: Remove the screws from the AC Inlet
P.C.B.
Steps 14 & 15: Remove the screws.
Step 16: Place the Power P.C.B. and the AC Inlet
P.C.B. as shown for checking.
· Checking for the Transformer P.C.B.
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SB-WA520GC