Panasonic EY7443 Service Manual page 7

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
• 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.
mark and check whether the tool rotates without any clutch operation.
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