Covidien Nellcor OxiMax N-560, Service Manual

Page: 56 / 158

Troubleshooting
46
Buttons
Table 7 lists symptoms of problems relating to nonresponsive buttons and
recommended actions. If the action requires replacement of a PCB, see
Disassembly Guide
on page 53.
Battery does not
charge.
Replace battery if it is more than 2 years old.
Replace the battery as indicated in
Battery Removal on
page 66.
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 170 mA to
300 mA. Replace power supply if above values are not
met.
Table 6: Power Problems (Continued)
Condition Recommended Action
Table 7: Button Problems
Symptom Recommended Action
The N
-
560 turns on and
responds to some, but
not all, buttons.
Replace Top Housing assembly. See Separating Top
and Bottom Cases on page 54.
Replace Front Panel PCB. See Front Case
Disassembly on page 57.
The N
-
560 turns on, but
does not respond to any
of the buttons.
Check the connection between the Main PCB and the
Front Panel PCB.
Replace the main PCB. See
Monitor Disassembly on
Main PCB Removal on page 60.
Replace the Front Panel PCB. See Front Case
Disassembly on page 57.