Panasonic EY78A1, Service Manual

Page: 7 / 19

7
4 Trial Operation (After Checking Troubleshooting Guide)
4.1. Hammer/Drill
Confirm the action when setting the H/D handle to HAMMER mode.
Rotation with hammering may work when the drill bit touches something like concrete or hard type of wood block. And confirm
the power.
It is OK, if it takes about 4-6 seconds by 20kgf to hole(
Φ
6
×
30)on the concrete.
Confirm the action when setting the H/D handle to DRILL mode.
No hammering when the drill bit touches something like concrete or hard type of wood block.
And confirm the forward and reverse side of rotation.
4.2. Switch
Change the rotation speed in proportion to the amount of pushing level on switch trigger.
0 ~ 1000rpm (14.4V)
0 ~ 1250rpm (18V)
4.3. Clutch
Check if the clutch torque changes suited for the number of clutch.
Check if the bit does not slip on Drilling mode.
4.4. Assembly
Confirm if there is NO gap between Housing A and B by pinching the lead wires.
Confirm all screws are tightened firmly and gaskets are attached.
There should be no metallic sound and abnormal sound.