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2.2.2.2 DC-DC Board
Under control of the system switch, the DC-DC board converts the DC power outputted by the
AC-DC board or the lead-acid battery power into the DC power required by the system to
produce 5 V, 12 V, or 24 V, and manages charging of the lead-acid battery.
This board is configured with power board software. In addition, the power boards of the A8 and
A9 basically have the same appearance, as shown in the figure below. Pay attention to the part
numbers during servicing.
Installation position of the DC-DC board
DC-DC board (A9)
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