Nellcor NPB-75, Руководство по обслуживанию

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Section 5: Troubleshooting
5-3
Symptom Probable Cause Corrective Action
The unit does not
turn on when the
ON/OFF button
is switched
ON
when the
monitor is
connected to
mains line
power.
The wall socket is not
receiving power or is
defective. Check the wall socket
for power supply or
mechanical defects. If
necessary, use a
different wall socket.
The AC adapter is
defective. Replace with new AC
adapter.
A CO
2
board component
is defective.
Replace with a new
CO
2
board.
One or more
buttons on the
upper or lower
keypad do not
work. The keypad is defective. Inspect the keypad for
cracks, deformations
or other damage.
Replace with a new
keypad.
A CO
2
board component
has failed.
Replace with a new
CO
2
board.
No information
is displayed on
the LCD. The contrast default
value is set too low or
high. Check the contrast
value in the Service
Mode using the
Contrast Cal.
option and correct
accordingly.
An LCD component has
failed. Replace with a new
LCD.
A CO
2
board component
has failed.
Replace with a new
CO
2
board.
LCD Backlight
does not come on
when the unit is
placed in a dark
environment. The Power
Management option is
set at
LOW .
Refer to the monitor’s
operator’s manual to
change the Power
Management option
to
NORMAL or
HIGH .
An LCD component has
failed. Replace with a new
LCD.
A CO
2
board component
has failed.
Replace with a new
CO
2
board.
Table 5-1: Troubleshooting Guide (Continued)