Nellcor N-180, Manual

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Section 6: Disassembly Guide
6-3
Battery
CN6
RS-232
Output
SW1
Dip Switches
CN2
CN1
CN5
AC In
14
CKT
JP5
Oximetry
Module
Speaker
9CKT
Sensor
Connector
ON/
STDBY
Switch
Push
Buttons
Front
Panel
CN1
CN2
CN3
LED
PCB
CN6
CN2
CN3
CN1
CN5
CN7
CN3
LED
Drive
PCB
CN4
34CKT
5CKT
JP1
Processor
PCB
28018A/30
Power
CN7
CN4
Figure 6-2: Monitor Cabling Diagram
PROCEDURES
The following procedures are organized in a top down approach. Procedures
for gaining access to and removing components in each major assembly are
given, starting with the display housing components. In general, to reach
components that are on the bottom of an assembly, you must perform all the
steps leading to the assembly you wish to remove. For example, to replace the
CPU PCB you must first remove the battery, top shield, and middle shield
components.
Most screw fasteners have some arrangement of washers, either a
combination flat washer and lock washer or a self locking type. To simplify
writing this procedure, washer removal is omitted from the applicable steps.
If a screw has a removable washer, and you remove the washer, ensure you
replace the washer when you assemble the monitor.
GAINING ACCESS TO COMPONENTS
Unfasten the top cover to gain access to components mounted on the bottom
cover assembly and the front panel assembly. Here is how to unfasten the top
cover assembly.
1. Place monitor upside down on the bench top.