NELLCOR PURITAN BENNETT Symphony N-3000 Service Manual page 55

5.6.1 Power
Power problems are related to AC and/or DC. Table 5-2 lists recommended
actions to power problems.
Condition
1. BATTERY-IN-
USE/BATTERY
LOW indicator
lights steadily
while N-3000 is
connected to AC
via the external
power supply.
2. The N-3000 does
not operate when
disconnected
from its external
power supply or
the power failure
alarm sounds
when AC power
is disconnected.
3. BATTERY-IN-
USE/BATTERY
LOW indicator
flashes during
DC operation.
4. The microproces-
sor failure alarm
sounds and no
error code is
displayed.
Table 5-2: Power Problems
Recommended Action
1. Ensure that the SPS power supply is plugged into
an operational AC outlet. If it is, and the green
indicator light is not lit, replace the power supply.
2. If the green SPS indicator is lit, ensure that the
power supply is properly plugged into the N-3000.
3. Check the fuse. The fuse is located on the lower
docking connector as indicated in paragraph 6.3
and Figure 6-3 of the Disassembly Guide section.
Replace if necessary.
4. Check the ribbon connection from the bottom
enclosure to the UIF PCB, as instructed in
paragraph 6.5 of the Disassembly Guide section. If
the connection is good, replace the UIF PCB.
1. The battery may be discharged. To recharge the
battery, refer to paragraph 3.3.2, Battery Charge.
The monitor may be used with a less than fully
charged battery but with a corresponding decrease
in operating time from that charge.
2. If the battery fails to hold a charge, replace the
battery as indicated in Section 6, Disassembly
Guide.
There are 15 minutes or less of usable charge left
on the N -3000 battery. At this point, if possible,
cease use of the N-3000 on battery power, connect it
to its external power source and allow it to recharge
(approximately 14 hours). The N-3000 may
continue to be used while it is recharging.
Replace the UIF PCB.
Section 5: Troubleshooting
5- 3