Circuit Board - Husqvarna PT26D Workshop Manual

Circuit board

Circuit board, placement
The circuit board is a central unit of the machine's electrical system. The board and the control circuit are
supplied via fuses FU3, FU12, located behind the battery. The electric system's principle differs from con-
ventional machines as all switches are supplied by the circuit board. When a switch is flicked on, a signal is sent
to the circuit board, which, following any necessary signal processing, relays power to the consumer load.
The circuit board has, apart from components for signal processing, circuit fuses and BITE (built in test
equipment) in the form of green and red LEDs. See "Built-in test equipment" on page 41. Some circuit
fuses are automatic fuses, while others are melt fuses, see "Fuses" on page 39.
The circuit board is not designed to be repaired, but is replaced in case of malfunction.
IMPORTANT INFORMATION
It is important to check the circuit outside
of the circuit board first, to ensure this is
correct, before replacing the circuit board.
Partly due to cost, but also so that no exter-
nal fault can damage the new circuit board.
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English-
DESIGN AND FUNCTION
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