Husqvarna Automower 550 Workshop Manual page 21

5. Remove the 2 screws and the 2 holders that hold
the motor control circuit board to the lower chassis.
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 opposite sequence
6.16.2 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 body. Refer to
the body on page 13 .
3. Remove the upper chassis. Refer to
install the upper chassis on page 14 .
1541 - 001 -
To remove and install
To remove and
4. Disconnect all cables from the application circuit
board.
5. Push the 2 clips and lift up the application circuit
board at the end and pull it out.
6. Install in opposite sequence
7. Connect the product to Autocheck. Select the
correct serial number in the log book. Autocheck
automatically installs the operating information that
are saved.
6.16.3 To replace the RTK module
1. Remove the body. Refer to
the body on page 13 .
2. Remove the upper chassis. Refer to
install the upper chassis on page 14 .
To remove and install
To remove and
Repair instructions - 21