Cordless Drill
Cordless Drill
| Symptoms of failure | Affected parts | Method of inspection | Cause of failure | Recommended action | Recommended action |
|---|---|---|---|---|---|
| Broken wire | Charger | Confirming the charging of Charger | Defective contact terminal of Charger | Repair & Replace | Replace |
| Defect caused by overcharging of Charger | Replace | Replace | |||
| Defect caused by wrong charging of battery | |||||
| Battery | Confirming the charging & damage of the battery | Fire due to overheating | Replace | Replace | |
| Breakage & defective contact of the terminal | |||||
| External impacts | |||||
| Switch | Confirm whether the switch connection is correct | Separation of lead wire due to wrong assembly | Defective switch connection reconnect according to the diagram | Replacement of switch | |
| Faulty connection of wire | |||||
| Defective rotary motion due to external impact | |||||
| Gearbox | Confirm whether the gearbox is working well | Damaged gear inside the gearbox | Replace | Replacement of gearbox | |
| Defective rotary motion due to external impact | |||||
| Confirming the operation of torque | Repair | ||||
| Motor | Confirming the operation of motor | Breakage due to overload caused by overwork | Replace | Replacement of motor | |
| Breakage of terminal connected to motor | |||||
| Damaged coil due to entry of other materials | Repair & Replace | ||||
| Damaged soldering of motor lead connection section | |||||
| Damage | Charger | Confirming the damage of charger | External impacts | Repair & Replace | Replace |
| Battery | Confirming the damage of the battery | External impacts | Repair & Replace | Replace | |
| Drill Chuck | Confirming the damage of drill chuck | External impacts | Repair & Replace | Replacement of drill chuck | |
| Housing | Confirming whether the housing is damaged | External impacts | Repair & Replace | Replacement of Housing | |
| Shape impact | |||||
| Switch | Damaged switch, Confirming operation | External impacts | Repair & Replace | Replacement of switch | |
| Gearbox | Confirming the operation of gearbox torque | External impacts | Repair & Replace | Replacement of gearbox | |
| Worn motor due to exceeded endurance limit | |||||
| Motor | Confirming the damage of motor terminal | Confirming the soldering of terminal connection part | Repair & Replace | Replacement of motor | |
| Clip holder | Clip holder terminal Confirming the damage | External impacts | Repair & Replace | Replacement of clip holder | |
| Worn due to exceeded of endurance limit | |||||
| Decreasing output | Battery | Confirming the charging of the battery | Worn due to exceeded of endurance limit | Replace | Replace |
| Motor | Confirming the operation of motor | Worn due to exceeded of endurance limit | Replace | Replacement of motor | |
| Motor on fire due to overload | |||||
| Noise | Gearbox | Confirming the noise from gearbox | Noise due to damaged gear | Replace | Replacement of gearbox |
| Run idling | Motor & Gearbox | Confirming the damage of gear inside the motor and gear box | Replacement of gearbox | Repair & Replace | Replacement of motor |
| Worn due to exceeded endurance limit | Replacement of gearbox | ||||
| Overheated | Overheated charger | Confirming the overheat state of charger | Confirming abnormal current | Replace | Replace |
| Defective temperature sensor | |||||
| Battery | Overheat of battery Confirming the state | Confirming abnormal current | Replace | Replace | |
| Defective temperature sensor | Replace | ||||
| Vibrating | Drill chuck | Confirmation of shaking drill chuck | Confirming the damage of drill chuck | Replace | Replacement of drill chuck |
| Own Defectiveness |