Panasonic SB-WA730 Service Manual page 11

Step 4: Remove the Woofer 2 by detaching the wires (+) and
(-).
6.2.3. Disassembly of the Power Amp
Unit
Step 1: Lay the speaker unit as shown. Remove 6 screws from
the bottom of the woofer unit.
Step 2: Remove 3 screws from the rear panel.
Step 3: Pull out the Power Amp Unit slightly as shown.
Step 4: Disconnect connector CN506.
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SB-WA730PP