Check List For Trouble Shooting - Makita DDF481 Technical Information

T
rouble shooting
Whenever you find any trouble in your machine, first, refer to this list to check the machine for solution.
Note in Repairing
(1) Use the full charged battery which has the star mark. (Fig. D-4)
(2) When Housing is disassembled, check the conditions of the electrical parts
(Connectors, Lead wires, Switches, etc.), Armature, Stator, Gear section, etc.
(3) Do the running test in Low speed mode (when the trigger is being pulled just a little)
to check the following functions by repeating 10 times;
• F/R change lever • Operation mode change ring • High/Low speed change lever
• Variable speed control trigger

Check List for Trouble Shooting

Check the items from the top of the following list. (Description of the item is referred to Circuit diagram in Fig. D-1.)
Change Stator complete if your problem cannot be solved although its corrective action has been carried out.
Symptom
LED indicator lamps
are on.
Rotation speed can
be changed.
Forward/ Reverse
rotation are OK
Yes
Motor runs when the machine
is switched on.
In case of running inconstantly,
go to "No".
No
LED job light are on.
The machine does not
have any trouble.
LED indicator lamps
are on.
LED job light are on.
Rotor is rubbed to
Stator.
No
Yes
No
Connectors are in incomplete
connection.
Lead wires are broken.
Yes
Connectors are in incomplete
connection.
No
Lead wires are broken.
Yes
No
Yes
Connectors are in incomplete
connection.
No
Lead wires are broken.
Yes
No
Yes
Cause
Controller is broken.
Switch is broken.
LED circuit is broken.
Switch is broken.
Switch is broken.
Terminal is broken.
Controller is broken.
Switch is broken.
LED is broken.
Controller is broken.
Rotor is broken.
Stator is broken.
P 10/ 11
Fig. D-4
Star mark
Corrective action
Replace Stator complete.
(See the next page.)
Connect it firmly.
Check Lead wires,
or replace it.
Replace Switch.
Connect it firmly.
Check Lead wires,
or replace it.
Replace LED circuit.
Replace Switch.
Replace Switch.
Check Terminal,
or replace it.
Replace Stator complete.
Connect it firmly.
Check Lead wires,
or replace it.
Replace Switch.
Replace LED.
Replace Stator complete.
(See the next page.)
Replace Rotor.
Replace Stator complete.