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Disassembly Guide
Replacement Level Supported
Prior to Disassembly
Separating Top and Bottom Cases
54
WARNING: Before attempting to open or disassemble the N-550B,
disconnect the power cord from the N-550B.
CAUTION: Observe ESD (electrostatic discharge) precautions when
working within the N-550B.
Note: Some spare parts have a business reply card attached. When you
receive these spare parts, please fill out and return the card.
The replacement level supported for this product is to the printed circuit board
(PCB) and major subassembly level. Once you isolate a suspected PCB,
follow the procedures in Disassembly Guide on page 53 to replace the PCB
with a known good PCB. Verify that the trouble symptom disappears and that
the N-550B passes all performance tests. If the trouble symptom persists,
swap back the replacement PCB with the suspected malfunctioning PCB (the
original PCB that was installed when you started troubleshooting) and
continue troubleshooting as directed in this section.
1. Turn the N-550B off by pressing the Power On/Off button.
2. Disconnect the N-550B from the AC power source.
3. Disconnect the sensor and the pulse oximetry cable.
1. Complete the procedure in Prior to Disassembly on page 54.
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