24
MAINTENANCE SECTION
TROUBLESHOOTING GUIDE
1.
Screwdriver fails to rotate
(forward or reverse).
Does the microswitch “click”
when the bit is pushed rearward
on push to start models or when
the trigger is depressed on
trigger models?
Is the brush light turned on?
With tool unplugged, can bit
be rotated manually?
Are the brush assemblies in
good condition?
Remove the Coupling, separate
the Housing halves and plug the
tool into an electrical receptacle.
Using a voltmeter, make the
following determinations:
Is there voltage to the Motor?
Is there voltage out of the
reverse switch?
Is there voltage to the Reverse
Switch?
Is there voltage out of the
Power Cord?
Is there voltage to the controller?
1. Starting microswitch is defective; replace the microswitch.
2. Pilot Rod “H” is binding; clear obstruction or replace Rod.
3. Pilot Rod “G” or Pilot Rod “H” is defective; repair or replace Rod.
4. Bit Holder is binding; clear the obstruction.
5. Incorrect Pilot Rod; check each rod length and place each length in
its proper position.
6. Incorrect assembly of Clutch; check clutch parts and balls for
proper assembly.
7. Stop Ring out of position; install the Stop Ring correctly.
Brushes are worn; replace the brush assemblies.
1. Defective planetary gearing; replace the defective parts.
2. Defective clutch; replace the defective parts.
3. Defective motor; replace the motor.
1. Brushes are cracked; replace the Brush Assemblies.
2. Commutator worn; replace the motor.
This procedure has the potential for severe shock
hazard and should be performed by qualified personnel.
Always turn off the electrical supply and disconnect the electrical
cord before installing, removing or adjusting any accessory on this
tool or before performing any maintenance on this tool.
1. Motor is defective; replace the Motor.
2. Brushes are defective; replace the Brush Assemblies.
1. Coil is defective; replace the Coil.
2. Wiring is defective; replace any broken wires and resolder any
defective solder connections.
1. Reverse Switch is defective; replace the Reverse Switch.
2. Solder connections are defective; resolder any defective
solder connections.
1. Power Cord is defective; replace the power Cord.
2. Solder connections defective; resolder any defective
solder connections.
1. Controller is defective; replace the Controller.
2. Solder connections are defective; resolder any defective solder
connections.
3. The connectors are mis–connecting; connect properly.
Replace the On/Off Switch.
No
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
No
Yes
Yes
No
No
No
Yes
No
