Schematic Diagrams And Assembly Drawings - Nellcor OXIMAX N-595 Service Manual

Schematic
Diagrams and
Assembly
Drawings
N-595
The patient is connected to the N-595 via a sensor and pulse oximetry cable.
The SpO analog front end drives the sensor's LEDs, conditions the incoming
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signal, and provides adjustable gain status. The microprocessor measures the
sensor's analog outputs and continually controls the gain stages and LED
drive current to ensure that the signals are within the measurement range.
The N-595 has a 240 x 64 liquid-crystal display (LCD) which provides
various display capabilities including numeric readouts for SpO
per minute (BPM) pulse rate, graphical pleth wave and pulse blip bar, menu
selection elements, and status/error messages. There is also a membrane panel
consisting of nine buttons and five LED indicators. The buttons allow the user
to navigate through and input menu selections using the LCD and LED
interfaces. The LED indicators provide feedback to the user on various N-595
and sensor conditions. The N-595 contains a speaker for audio output.
The static RAM and the RTC for the microprocessor are powered whenever
the N-595 has power, either AC power or battery power. This allows time and
certain data to be maintained, even while the N-595 is turned off.
Figure 27: Main PCB Schematic Diagram (Sheet 1 of 13)
Figure 28: Main PCB Schematic Diagram (Sheet 2 of 13)
Figure 29: Main PCB Schematic Diagram (Sheet 3 of 13)
Figure 30: Main PCB Schematic Diagram (Sheet 4 of 13)
Figure 31: Main PCB Schematic Diagram (Sheet 5 of 13)
Figure 32: Main PCB Schematic Diagram (Sheet 6 of 13)
Figure 33: Main PCB Schematic Diagram (Sheet 7 of 13)
Figure 34: Main PCB Schematic Diagram (Sheet 8 of 13)
Figure 35: Main PCB Schematic Diagram (Sheet 9 of 13)
Figure 36: Main PCB Schematic Diagram (Sheet 10 of 13)
Figure 37: Main PCB Schematic Diagram (Sheet 11 of 13)
Figure 38: Main PCB Schematic Diagram (Sheet 12 of 13)
Figure 39: Main PCB Schematic Diagram (Sheet 13 of 13)
Figure 40: Main PCB Assembly Drawing (Front View)
Figure 41: Main PCB Assembly Drawing (Rear View)
Technical Discussion
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