Panasonic SA-HT822VP Service Manual page 42

Step 4: Press the PCB Spacer as arrow shown and lift up the DSP P.C.B.
Step 5: Detach all the FFC board (CN101, CN401).
Step 6: Remove 2 screws.
Step 7: Detach the POWER P.C.B. and AC INLET P.C.B. while removing tab on board holder.
Step 8: Detach the connector (P1102).
Step 9: Remove 5 screws.