Troubleshooting Guide; Table 5-1: Problem Categories - Mallinckrodt NELLCOR NPB-4000 Service Manual

Section 5: Troubleshooting

5.6 TROUBLESHOOTING GUIDE

Note: Taking the recommended actions discussed in this section will correct the
5-2
Problems with the NPB-4000/C are separated into the categories indicated in
Table 5-1. Refer to the paragraph indicated for further troubleshooting
instructions.
majority of problems you will encounter. However, problems not covered here
can be resolved by calling Mallinckrodt Technical Services or your local
Mallinckrodt representative.
1. Power
• No power-up
• Fails power-on self-test
• Powers down without apparent
cause
2. Error Messages
3. Switches/Knob
• Monitor does not respond properly to
switches
4. Display/Audible Tones
• Display does not respond properly
• Tones do not sound properly
5. Operational Performance
• Displays appear to be operational,
but monitor shows no readings
• Suspect readings
• Printer not responding
All of the categories in Table 5-1are discussed in the following paragraphs.

Table 5-1: Problem Categories

Problem Area Refer to Paragraph
5.6.1
5.6.2
5.6.3
5.6.4
5.6.5