Panasonic EY74A2 Service Manual page 6

3.2. Trial Operation (after checking Troubleshooting Guide).
3.2.1. Assembly
• Confirm if there is no gap between housing A, B and C by pinching lead wires.
• There is no dust or deformation on battery terminals.
3.2.2. Operation
• Check whether the tool operates properly in both the forward and reveres directions.
• Press the light button on the operation panel to confirm that the LED lights up.
• Check whether the tool speed increases continuously as the trigger is gradually engaged.
• Rotate the clutch handle and check whether the clutch switches properly.
• Check if the rotation speed is normal rated value.
High: 1580/min (rpm) at 18V, 1350/min (rpm) at 14.4V
Low: 470/min (rpm) at 18V, 400/min (rpm) at 14.4V
• Pull the trigger all the way back and check whether the tool stops rotating immediately when it is released.
• Set the clutch handle to the [
• Operate (rotate) the keyless chuck and check whether the chuck's three jaws move smoothly.
3.2.3. Integrity
• With the switch activated, shake the tool back and forth and up and down and verify that its sound does not change excessively.
• Check for the presence of any dirt or foreign matter from the repair process on the outside of the tool.
] mark and check whether the tool rotates without any clutch operation.
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