The Circuit Boards And Sensors - Husqvarna Automower 550 Workshop Manual

6.16 The circuit boards and sensors

These are the circuits boards in the product:
9
5
2
7
8
6
1. Motor control board (rear loop sensors and tilt
sensor)
2. RTK module
3. Application circuit board
4. Communication circuit board
5. Ultrasonic sensors
6. Front loop circuit board (front loop sensors)
7. Lift sensor circuit board (lift sensors)
8. Front collision circuit board (front collision sensor)
9. Rear collision circuit board (rear collision sensor)
10. Cutting height circuit board (cutting height sensor)
11. Ultrasonic circuit board
The circuit boards contain the electronics and firmware
necessary to control the products functions.
The motor control circuit board, RTK module, ultrasonic
circuit board and the application circuit board and the
communication circuit board contain their own separate
firmware. If any of these boards are replaced, they must
be programmed in Autocheck.
The other circuit boards do not have any firmware, and
do not need to be programmed after a replacement.
CAUTION: Pull the connector and not the cable.
CAUTION: Do not touch the components or pin
terminals on the circuit board.
CAUTION: If the circuit board is to be checked
in order to evaluate the warranty, it must be
placed in a bag with protection against ESD
(electrostatic discharge).
20 - Repair instructions
3
10
5
11
4
7
CAUTION: Always protect the product from
electrostatic discharge, ESD, before you start to
work on electrical components.
6.16.1 To replace the motor control circuit board
1. Remove the body. Refer to
1
the body on page 13 .
2. Remove the upper chassis. Refer to
install the upper chassis on page 14 .
3. Disconnect the power cables from the motor control
circuit board.
CAUTION: Always disconnect the power
cable first to prevent current spikes that may
harm the circuit boards or the battery.
4. Disconnect all the other cables from the motor
control circuit board.
To remove and install
To remove and
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