Nellcor Oximax NPB-40, Руководство по обслуживанию

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Troubleshooting
34
If an error code is shown on the NPB-40 front panel display, see Figure 3,turn the
NPB-40 off, wait ten seconds, then turn the NPB-40 on. This clears recoverable
errors encountered by the NPB-40. If the error code still persists, refer to Table 4
for the indicated failure.
Figure 3: Typical Error Code Display
Once you have performed the recommended action, reassemble the NPB-40, refer
to
Performance Verification on page 15, and conduct a performance verification
before returning the NPB-40 to service. If the symptom persists continue
troubleshooting.
Table 3:
Troubleshooting Guide
Condition Recommended Actione
The NPB-40 does not turn on when the
Power
button is pressed.
• The
Power
button was not fully
depressed.
Fully press the
Power
button.
• The batteries are missing. Open the battery compartment and if batteries are missing
install new batteries. Refer to the NPB-40 Operator’s
manual.
• The batteries are installed incorrectly or
they are backwards.
Open the battery compartment and if batteries are not
installed correctly, remove and reinstall the batteries. Refer
to the NPB-40 Operator’s manual.
• The batteries are at or near a voltage too
low for the NPB-40 to operate.
Install new batteries. Refer to the NPB-40 Operator’s
manual.
• The sensor is defective. Replace the sensor.
• The front panel keypad is defective. Caution: Unlock J3 before attempting to
remove flex circuit conductor.
Open the NPB-40, disconnect the front case from J3 on the
CPU PCB and connect an ohmmeter between the flex circuit
conductor for J3, pin 5 and the conductor for J3, pin 3.
Observe a short when the
Power
button is pressed and an
open when not pressed. If incorrect, replace the front case.
See Front Case Assembly Replacement on page 49.
If the
Power
button functions correctly, replace CPU PCB.
See CPU PCB or Display PCB Replacement on page 46.
• Flex circuit between the front panel and
the CPU PCB is disconnected.
Inspect the flex circuit and reconnect if the flex circuit is
loose. See Separating the Front and Back Cases on page 44.