Replacing The Buzzer; Replacing The Main Switch - Husqvarna Automower 420 Technical Manual

5.15 Replacing the buzzer

1. Dismantle the body, see 5.2.1 Dismantling
the body on page 59.
2. Dismantle the chassis, see
5.2.2 Dismantling the chassis on page 59.
3. Loosen the 2 screws (Torx 20) holding the
buzzer in position.
4. Disconnect the buzzer connectors from the
HMI circuit board and remove the buzzer
from the chassis.
5. Fit the new buzzer. Be careful when fitting
the rubber seal through the chassis to
prevent any moisture getting through the
opening.
6. Connect the buzzer's connector to the HMI
circuit board.
7. Refit the chassis and body.

5.16 Replacing the main switch

1. Dismantle the body, see 5.2.1 Dismantling
the body on page 59.
2. Dismantle the chassis, see
5.2.2 Dismantling the chassis on page 59.
3. Dismantle the MCB, see 5.8 Replacing the
MCB on page 65.
4. Press the snap-on fasteners together
on the main switch and press the main
switch out through the opening in the lower
chassis section.
5. Fit the new main switch together with the
new gasket in the opening and press the
main switch into the opening. Ensure that
the locking barbs are securely attached to
make it completely sealed.
IMPORTANT INFORMATION
Check that the main switch is installed so
that the digit 1 is positioned to the left and 0
to the right, viewed from behind.
6. Refit the main circuit board and connect all
the connections.
7. Refit the chassis and body.
English - 70
5. REPAIR INSTRUCTIONS