Panasonic EY7880 Service Manual page 12

Procedure 2A → 2B → 2C
Ref. No. 2C Assembly of driving block into housing.
1. Set the H/D handle to HAMMER mode.
2. Set the H/S handle in between HIGH and SOFT model.
3. Insert the gear case assembly into the housing.
4. Connect the switch assembly with motor lead wires.
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