Table 5-7: Operational Performance Problems - Mallinckrodt NELLCOR NPB-4000 Service Manual

5.6.5 Operational Performance
Table 5-6: Display/Audible Tones Problems
Condition
3. Audible alarm does
not sound.
Table 5-7 lists recommended actions to address problems related to operational
performance.

Table 5-7: Operational Performance Problems

Condition
1. Monitor appears to be
operational, but
physiological values are
suspect or nonexistent.
2. Printer paper will not
advance.
Recommended Action
1. Verify alarm volume setting in Alarm/Limits
menu, and test operation of alarm tone by
pressing Heart Rate Tone Volume switch
while alarm volume setting is displayed.
2. Ensure speaker cable is connected to power
supply assembly.
3. If problem persists, replace speaker
assembly.
4. If problem persists, replace main PCB.
Recommended Action
1. Replace each patient cable (or hose) with a
known serviceable cable.
2. Ensure internal ECG, temperature, and
SpO cables are connected to main PCB.
2
Ensure hoses in pneumatic system are
properly connected, and NIBP pump motor
is connected to power supply PCB.
3. If problem persists, replace main PCB.
1. Open printer door and check paper is
present. Press printer module firmly into
monitor to ensure printer module is fully
engaged with connector on printer PCB.
2. Cycle power on monitor. Printer should
execute a line feed at conclusion of power-
up sequence.
3. If problem persists, ensure main ribbon
cable is connected to printer PCB, power
supply, and main PCB.
4. If problem persists, replace printer.
5. If problem persists, replace printer PCB.
6. If problem persists, replace main PCB.
Section 5: Troubleshooting
5-9