Husqvarna Automower 405X Workshop Manual page 26

6.15.1 To replace the motor control circuit board
1. Remove the top cover. Refer to
install the top cover on page 19 .
2. Remove the body. Refer to
the body on page 19 .
3. Remove the upper chassis. Refer to
install the upper chassis on page 20 .
CAUTION: Always disconnect the power
cable first to prevent current spikes that may
harm the circuit boards or the battery.
4. Disconnect the power cable from the motor control
circuit board.
5. Disconnect all the other cables from the motor
control circuit board.
6. Pull up the motor control circuit board and remove it.
CAUTION: If the board is to be checked in
order to evaluate the warranty, it must be
placed in a bag with protection against ESD
(electrostatic discharge).
7. Install in the opposite sequence
26 - Repair instructions
To remove and
To remove and install
To remove and
6.15.2 To replace the application circuit board
The operating information of the product is saved in the
application circuit board. The Autocheck service
program saves this information and then installs it in the
product when the application circuit board has been
replaced.
1. Connect the product to Autocheck before application
circuit board is replaced. The operating data is then
saved automatically.
2. Remove the top cover. Refer to
install the top cover on page 19 .
3. Remove the body. Refer to
the body on page 19 .
4. Remove the upper chassis. Refer to
install the upper chassis on page 20 .
CAUTION: Always disconnect the power
cable first to prevent current spikes that may
harm the circuit boards or the battery.
5. The application circuit board is held to the upper
chassis by 2 clips. Push the clips and lift up the
application circuit board.
6. Put a new application circuit board into position.
7. Install in the opposite sequence
8. Connect the product to Autocheck. Select the
correct serial number in the log book. Autocheck
automatically installs the operating information that
are saved.
6.15.3 To install the communication circuit board
The communication circuit board contains Automower
Connect and the GPS module.
To remove and
To remove and install
To remove and
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1582 - 001 - 23.12.2020