Panasonic SA-BT222EB Service Manual page 69

Caution: Do not exert strong force when releasing the tabs.
Step 3 Detach the Front Panel Block Assembly slightly forward.
Step 4 Lift up the Wire Clampers.
Step 5 Detach 6P Cable at the connector (CN5400) on D-Amp
P.C.B..
Step 6 Detach 10P Cable at the connector (CN2004) on Main
P.C.B..
Caution: During assembling, ensure that 10P cable is bend
down properly as diagram shown.
Step 7 Remove 5 screws.
Step 8 Release P.C.B. Spacer by using long nose plier.
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