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< TROUBLE > < CHECK > < REMEDY >
No speed-control. <CHECK FET.> NO Replace switch & FET
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Even if FET block is defective, it can not be replaced individually. Replace
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block.
whole switch block.
Shortcircuit (G: gate) and (S: source), and measure between it and (D:
drain) with switch block.
NOTE:
* FET is sensitive against static electricity.
** The resistance value will vary dependent upon the measurement
range of the tester.
↓OK
<CHECK SWITCH BLOCK.> NO Replace switch & FET
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block.
Weakness of <CHECK ANVIL.> NO Replace anvil.
vibration.
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Check wear condition. If no less than 1mm from the corner at (A) side or
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0.5mm from the corner at (B) side, anvil is OK.
↓OK
<CHECK HAMMER BLOCK.> NO Replace driving shaft
Check whether hammer block rotates smoothly when moving shaft of
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assembly.
hammer.
↓OK
<CHECK MOTOR.> NO Replace motor.
Measure no load rotation whether it is more than 1,900rpm with full charged
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battery pack.
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EY6535-U1