Makita DTS141 Technical Information page 8

R
epair
[4] TROUBLESHOOTING
Whenever you find any trouble in your machine, refer to this chapter first.
Note in Repairing
(1) Use the full charged battery that has a star mark. (Fig. T-1)
(2) When Housing is disassembled, check the conditions of the electrical parts
(Connectors, Lead wires, Switches, etc.), Rotor, 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 • every Operation work mode • Variable speed control trigger
Test for recognizing the trouble on FET (Field effect transistor) in Controller
Trouble on Controller can be checked with Tester as follows.
Fig. T-2
1. Set Digital tester (1R402) in the diode mode
( mark on the tester).
3. Attach Black tester bar to the plus pole,
Red tester bar to minus pole of Terminal.
And, check the figure in the tester.
Note: Be careful not to attach the bars in reverse.
2. After removing the battery from the machine,
pull Switch trigger and hold it at "ON position"
with tape or the like.
4. There is no fault on FET of Controller
if the tester indicates within 0.79V - 0.81V.
If it indicates 0V or 0.4V approx.,
Controller is broken. Replace it with a new one.
P 8/ 11
Fig. T-1
Star mark