Canon MX7600 Service Manual page 30

(4) AC adapter removal
1) Remove the side cover L.
2) Remove the AC adapter (2 screws on the side, 1 screw on the top).
Special notes on attaching the AC adapter:
< Japan model >
Insert and push the arrester ground wire in the hole until it fits to the arrester ground pin inside the AC adapter.
After connection, gently pull the ground wire and confirm that it will not be removed.
< Other models>
Fit the arrester ground wire in 2 grooves as shown in the photo.
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