4-8
Cable defective or
poorly connected
1. Check that the cable from battery interface
board to power management and interface
board is correctly connected.
2. Check that cables and connectors are not
damaged.
Power management and
interface board failure
Replace the power management and
interface board.
AC/DC power board
failure
Replace the AC/DC power board
No +3.3 V output
No +5.0 V output
No +12 V output
Power supply protection
Power management and
interface board failure
AC/DC power board
failure
1. Turn off the monitor then restart it.
2. If the problem remains, disconnect the AC
mains for 5 s and reconnect it, then restart
the patient monitor.
3. If the problem still remains, replace power
management and interface board.
4. If the problem still remains, replace
AC/DC power board.
NOTE
z When the power module has a failure, it may cause problems to other components,
e.g. the monitor suddenly breaks down during start-up, as the power module may
have a power supply protection. In this case, troubleshoot the power module per
the procedure described in the table above.
z Components of the main unit are powered by the power module. In the event that a
component malfunctions, check if the operating voltage is correct.
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