Flowchart Of Troubleshooting - Makita DJR187 Technical Information

8-3

Flowchart of Troubleshooting

Check the items from the top of the following list. (Description of the item is referred to Circuit diagram in Fig. 6-1.
After corrective action, return to the start of Troubleshooting and re-check again.
Symptom
Does Tester indicate 0.7V ~ 0.9V?
When tester cannot be prepared, go to "Yes".
Yes
Yes
Motor runs when the machine is
switched on.
Try 10 times. In case of running
inconstantly, go to "No".
No
Unusual behavior occurs during
work./ Rotor is rubbed Stator.
The machine shows same symptom in
spite of the above corrective actions.
No
LED Job light is
ON.
No
Yes
The machine
works properly.
No
LED Job light
is ON.
Yes
No
Yes
24 / 24
Cause
Controller is broken.
Lead wires are broken.
LED circuit is broken
Connectors are in
incomplete connection.
Lead wires are broken.
Switch is broken.
Terminals are broken.
Controller is broken.
Connectors are in
incomplete connection.
Lead wires are broken.
Controller is broken.
Rotor is broken.
Stator is broken.
Controller is broken.
Corrective action
Replace Controller.
Check Lead wires, or
replace it.
Replace LED circuit.
Connect them firmly.
Check Lead wires, or
replace it.
Replace Switch.
Check Terminal, or replace
it.
Replace Controller.
Connect them firmly.
Check Lead wires, or
replace it.
Replace Controller.
Replace Rotor.
Replace Stator.
Replace Controller.