Inspecting Brake Switch - Echo shindaiwa DCS-1600 Service Manual

19
CHAIN BRAKE SYSTEM
DCS-1600

3-1 Inspecting brake switch

H S
1. Remove cover (S).
2. Clean saw dust and/or dirt around brake switch (H).
3. Connect one probe of multimeter to terminal "1"
1
2
of brake switch (H). Connect the other probe to ter-
H
minal "2" .
4. When pressing brake switch (H), multimeter
should show that the circuit is in conducted state.
(Electrical current can flow between terminal "1" and "2".)
Also, when not pressing brake switch (H), multi-
meter should indicate infinite resistance.(Electrical
current can not flow between terminal "1" and "2".)
5. If brake switch (H) is defective, replace control
board connected to the switch (H) with new one.
NOTE: Brake switch (H) can not be supplied sepa-
rately.
Released position Activated position
h1 h1
6. Inspect brake switch (H) as follows. If the unit is
not as follows, install brake switch (H) and brake
lever correctly.
Chain brake released position :
Lever (h1) of chain brake switch press button (h2).
Chain brake activated position :
Lever (h1) of chain brake switch does not touch
h2
H H
button (h2).
7. If leads (h3) of brake switch (H) do not have
h3
continuity, remove control board from the unit and
inspect it.
H