Mallinckrodt NELLCOR NPB-4000, Service Manual

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6-1
SECTION 6: DISASSEMBLY GUIDE
6.1 Introduction
6.2 How to Use this Section
6.3 Disassembly Sequence Flow Charts
6.4
Closed Case Disassembly Procedures
6.5 Front Case Disassembly Procedures
6.6 Rear Case Disassembly Procedures
6. DISASSEMBLY GUIDE
WARNING: Performance Verification. Do not place the NPB-4000/C into
operation after repair or maintenance has been performed, until all
Performance Tests and Safety Tests listed in Section 3 of this service
manual have been performed. Failure to perform all tests could result in
erroneous monitor readings.
6.1 INTRODUCTION
The NPB-4000/C can be disassembled down to all major component parts,
including:
• PCBs
• battery
• cables
• function switches
• chassis enclosures
The following tools are required:
• small, Phillips-head screwdriver
• medium, Phillips-head screwdriver
• needle-nose pliers
• 9/16-inch socket (for knob encoder)
WARNING: Before attempting to open or disassemble the NPB-4000/C,
disconnect the power cord from the NPB-4000/C.
Caution: Observe ESD (electrostatic discharge) precautions when working
within the unit.
Note: Some spare parts have a business reply card attached. When you receive
these spare parts, please fill out and return the card.
6.2 HOW TO USE THIS SECTION
The step-by-step procedures that are used to access replaceable parts of the
NPB-4000/C are illustrated in the Disassembly Sequence Flow Charts in
paragraph 6.3, Figure 6-1 and Figure 6-2. As indicated in the flow charts, the
monitor consists of two main assemblies, the Front Case Assembly and Rear
Case Assembly.