Troubleshooting; How To Use This Section; Who Should Perform Repairs; Replacement Level Supported - Mallinckrodt Nellcor N-20 Service Manual

4 TROUBLESHOOTING

4.1 How to Use This Section

4.2 Who Should Perform Repairs

4.3 Replacement Level Supported

4.4 Obtaining Replacement Parts

4.5 Troubleshooting Guide

4.6 Service Procedures
4.7 Error Codes
WARNING: Disassembly of the instrument exposes hazardous voltages. To avoid
injury or instrument damage, disassembly or maintenance must be attempted only by
qualified service personnel.
4.1 How to Use this Section
This section explains how to identify and correct monitor difficulties and provides procedures for
common service-related activities, such as battery replacement, clearing paper jams, and adjusting
printer darkness.
Use this section in conjunction with Section 3, Performance Verification, and Section 6, Spare Parts.
To remove and replace a part you suspect is defective, follow the instructions in Section 5,
Disassembly Guide. The functional circuit analysis, located in the Technical Supplement at the end of
this manual, offers information on how the device functions, as well as part locator diagrams and
detailed schematic diagrams.
4.2 Who Should Perform Repairs
Only qualified service personnel should open the device housing, remove and replace components, or
make adjustments. If your medical facility does not have qualified service personnel, contact
Mallinckrodt Technical Services.
4.3 Replacement Level Supported
The replacement level supported for this product is to the printed circuit board (PCB) and major
subassembly level. Once you isolate a suspected PCB, replace the PCB with a known good PCB.
Check to see that the trouble symptom disappears and the device passes all performance tests. If the
trouble symptom persists, swap the replacement PCB and the suspected malfunctioning PCB (the
original PCB that was installed when you started troubleshooting) and continue troubleshooting as
directed.
4.4 Obtaining Replacement Parts
Mallinckrodt Technical Services provides technical assistance information and replacement parts. To
obtain replacement parts, contact Mallinckrodt. Refer to parts by the part names and part numbers
listed in Section 6, Spare Parts.
4.5 Troubleshooting Guide
This section discusses potential symptoms, possible causes, and actions for their resolution. Should
this troubleshooting guide fail to address the symptoms evident in a particular N-20/N-20P, please
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