Panasonic SB-WA920PP Service Manual page 13

Step 19: Remove all the screws.
Step 20: Detach the connector CN503 and remove the transformer.
- Checking for the Transformer, Amplifier and AC Inlet P.C.B.
Step 21: Place the Transformer P.C.B., Amplifier P.C.B. and the AC Inlet P.C.B. as shown for
checking.
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