Panasonic SB-WA920PP Service Manual page 14

Steps 22: Release the AC Inlet P.C.B. as arrow shown.
- Checking for the Power and CD Open P.C.B.
Step 23: Place the Power P.C.B. and the CD Open P.C.B. as shown for checking.
6.3. Main Component Replacement Procedures
6.3.1. Replacement of the Power ICs and Transistors
Step 1: Desolder the Power IC and Transistor terminals.
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