Panasonic EY7442, Service Manual, Page: 7 / 23

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3.1. Trial Operation (after checking Troubleshooting Guide.)
3.1.1. ASSEMBLY
1. Confirm if there is NO gap between Housing A and B by pinching the lead wires.
2. Confirm all screws are tightened firmly.
3. There should be no metallic sound and abnormal sound.
4. There is no dust or deformation on battery terminals.
5. Confirm if there is no dirt when repairing.
3.1.2. OPERATION
1. Confirm the forward and reverse side of rotation.
2. Confirm if LED rights ON. Once battery pack is removed and attached, press the switch handle, otherwise LED does not right
ON.
3. Confirm if the tools become hot in a short operation.
4. Confirm the action when setting the DRILL mode.
5. Confirm if the chuck jaws move smoothly and hold the bit firmly.
6. Confirm the rotation of speed if it changes in proportion to the amount of pushing level on switch handle.
7. Confirm if the rotation stops when releasing the switch handle.
8. Check if the clutch torque changes suited for the number of clutch.
9. No clutching when setting mark.
only for EY7950
10. Rotation with hammering may work when the drill bit touches something like concrete or hard type of wood block by
mode. And confirm the power.