Husqvarna Automower 420 Workshop Manual page 29

placed in a bag with protection against ESD
(electrostatic discharge).
8. Install in opposite sequence
9. Connect the product to Autocheck. Select the
correct serial number in the log book. Autocheck
automatically transfers the operating information
saved in the log book.
6.18.2 To replace the HMI circuit board
1. Remove the body. Refer to
the body on page 20 .
2. Remove the upper chassis. Refer to
install the upper chassis on page 20 .
3. Remove the center console. Refer to
install the center console on page 22 .
4. Disconnect all cables from the HMI circuit board.
5. The HMI circuit board is held to the upper chassis by
2 clips. Push the clips and lift up the HMI circuit
board.
6. Put a new HMI circuit board into position.
7. Install in opposite sequence
8. Connect the product to Autocheck to program the
HMI circuit board. Refer to
boards on page 16 .
6.18.3 To replace the communication circuit board,
420/440 only as accessory
The communication circuit board contains Automower
connect and the GPS module.
1191 - 001 -
To remove and install
To remove and
To remove and
Programming circuit
®
Note: The communication circuit board contains an e-
SIM. For some markets instead a separate SIM card is
used.
1. Remove the body. Refer to
the body on page 20 .
2. Remove the upper chassis. Refer to
install the upper chassis on page 20 .
3. Remove the 4 screws that hold the communication
circuit board to the chassis.
4. Disconnect the cable from the communication circuit
board.
5. Remove the circuit board.
6. Reconnect the cables to the new circuit board.
Note: The HMI cable must be connected in correct
direction.
7. Install in opposite sequence.
8. If an communication circuit board is to be installed
as an accessory, you must update the product with
new firmware. Connect the product to Autocheck
Automatic programming . Also refer to the
and select
instructions provided with the accessory kit.
To remove and install
To remove and
Repair instructions - 29