Buttons - Nellcor OxiMax N-600x Service Manual

Troubleshooting

Buttons

66
Symptoms
Battery does not charge.
Table 8 lists symptoms of problems relating to non-responsive buttons and
recommended actions. If the action requires replacement of a PCB, refer to
Disassembling the Monitor on page 83.
Symptom
Buttons do not respond
when the unit is turned
on.
Table 7: Power Problems
Recommended Actions
• Replace battery if it is more than two years old.
• If the battery fails to hold a charge, replace the
battery as indicated in Battery Replacement on
page 88.
• Open the monitor as described in Disassembling
the Monitor on page 83. Replace a new battery
and verify the charging voltage output to the
battery while on AC when first turning the
monitor ON. The charging voltage will climb
between 7.05 to 7.35 volts. Since the battery is
good, the charging voltage will decrease with
time. Replace power supply if above values are
not met.
Table 8: Button Problems
Recommended Action
• Replace the Main Board PCB. See Main Board
PCB Replacement on page 97.
• If the buttons still do not work, replace the Top
enclosure assembly. See Top Case Assembly
Replacement on page 102.