Panasonic SA-BT235P Service Manual page 65

Step 5 Remove 2 screws on D-Amp P.C.B..
Step 6 Remove 4 screws.
Step 7 Release the tab of the side of the Rear Panel in the
direction of arrow.
Step 8 Remove D-Amp P.C.B. according to direction of arrow
shown.
Caution: During assembling, ensure that D-Amp P.C.B. is
seated properly at the locators.
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