Covidien Nellcor OxiMax N-560, Service Manual

Page: 55 / 158

Troubleshooting
N-560 Service Manual 45
Table 6: Power Problems
Condition Recommended Action
Battery Low indicator
lights steadily while
N
-
560 is connected to
AC and battery is fully
charged.
Ensure that the N-560 is plugged into an operational
AC outlet and the AC indicator is on.
Check the fuses. The fuses are located in the Power
Supply PCB as indicated in
Separating Top and Bottom
Cases
on page 54. Replace if necessary.
Open the N-560 as described in
Separating Top and
Bottom Cases
on page 54. Verify the power supply's
output to the battery while on AC. Disconnect the
battery leads from the battery and connect a DVM to
the battery leads. The voltage measured should be 13.8
VDC to 14.2 VDC and the current should be 500 mA to
600mA with the Power switch off and 750 mA to 830
mA with the Power switch on. Replace power supply if
above values are not met.
Check the cable connection between the Top Enclosure
and the Front Panel PCB. If the connection is good,
replace the Front Panel PCB. See
Front Case
Disassembly
on page 57
.
The N
-
560 does not
operate when
disconnected from AC
power.
The battery may be discharged. To recharge the battery,
refer to
Battery Charge
on page 8. The N-560 may be
used with a less than fully charged battery, but with a
corresponding decrease in operating time from that
charge.
Replace the battery as indicated in
Battery Removal
on
page 66.
Battery Low indicator
on during DC operation
and an alarm is
sounding.
There are 15 minutes or less of usable charge left on the
N
-
560 battery before the
N-560
shuts off. At this point,
if possible, cease use of the N
-
560 on battery power,
connect it to an AC source and allow it to recharge
(approximately 6 hours). The N
-
560 may continue to
be used while it is recharging.