Panasonic EY7443, Service Manual

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3.2. Trial Operation (After Checking Troubleshooting Guide)
3.2.1. Assembly
• Confirm if there is no gap between housing A and B by pinching lead wires.
• There is no dust or deformation on battery terminals.
• Confirm if there is no dirt when repairing.
3.2.2. Operation
• Check whether the tool operates properly in both the forward and reveres directions.
• Check whether the LED light turns on and off each time the LED light on/off button is depressed.
• Check whether the tool detects the load and switches gears automatically during AUTO mode operation (continuous speed
adjustment).
• Check whether the gear can be fixed during HIGH/LOW mode operation.
• Check whether the tool speed is normal after repair and reassembly.
• High mode: 180 to 1,400 rpm
• Low mode: 50 to 400 rpm
• Check whether the tool may become hot in a short operation.
• Set the clutch handle to the mark and check whether the tool rotates without any clutch operation.
• Operate (rotate) the keyless chuck and check whether the chuck’fs three jaws move smoothly.
• Pull the trigger all the way back and check whether the tool stops rotating immediately when it is released.
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.
• Rotate the clutch handle and check whether the clutch switches properly.
• Check whether the keyless chuck is attached securely to the tool.
• Check whether the chuck's jaws operate properly.
• Check for the presence of any dirt or foreign matter from the repair process on the outside of the tool.