Flowchart Of Troubleshooting - Makita DGA417 Repair Manual

8-3

Flowchart of Troubleshooting

Check the items from the top of the following list. (Description of the item is referred to CIRCUIT DIAGRAM on page
17/23) After corrective action, return to the start of Troubleshooting and re-check again.
Symptom
Does Tester indicate 0.8V± 0.1V? When tester cannot
be prepared, go to "Yes".
8-4
Yes
Yes
Motor runs when the
machine is switched on.
Try 10 times. In case of
running inconstantly, go to
"No".
No
No
Mode indication
lamp is ON
.
Yes
No
All of three
No
displays for
Battery fuel are
ON
Yes
Speed can be
No
changed variably
by operating Dial.
No problems
No
Battery fuel
display is ON.
Yes
Motor does not
No
run in order,
because of
physical cause,
such as rotor
rubs on Stator.
Yes
The machine
shows same
symptom in spite
of the above
corrective actions.
21 / 23
Cause
Controller is broken.
Some trouble on Mechanism
Controller is broken.
Controller is broken.
Controller is broken.
Connectors are poorly
connected.
Lead wires are broken.
Switch is broken.
Terminal is broken.
Controller is broken.
Connectors are poorly
connected.
Lead wires are broken.
Controller is broken.
Rotor is broken.
Stator is broken.
Controller is broken.
< Note >
Controller of this product is a component part of Stator complete.
Therefore, Stator complete has to be entirely replaced together with
Controller, even if the broken Controller is the cause of trouble.
Corrective action
Replace Stator Complete
Check mechanical section
Replace Stator Complete
Replace Stator Complete
Replace Stator Complete
Connect Connectors firmly.
Check Lead wires and replace
them.
Replace Switch.
Check Terminal, or replace it.
Replace Stator Complete
Connect Connectors firmly.
Check Lead wires and replace
them.
Replace Stator Complete.
Replace Rotor.
Replace Stator Complete.
Check Stator complete, or
replace it.