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N-180 Pulse Oximeter Service Manual _
8.
Remove two screws that holdd top shield to standoffs below (figure 6-4).
4.
Rotate top shield being careful of transformer wires that enter notch
near the back; slide tabs out and lift free.
Screw, 2 places
CPU top shield (23)
Transformer (74) & (75)
and bracket (73)
280184/40
Figure 6-4:
Removing the Top Shield
Transformer Removal and Replacement
'To remove and replace the transformer (figure 6-5, which also illustrates AC
filter details) follow these steps:
1.
Gain access to the transformer by following the instructions in this
section for gaining access to components.
2.
Remove top shield following instructions in this section.
8.
Disconnect connector on CPU PCB connector CN5 (item 5 in
illustration).
'
4.
Disconnect connector on CPU PCB connector CN7 (item 4 in
illustration).
5.
Remove two 6 mm hex nuts holding transformer to transformer bracket.
6
Remove transformer.
7.
Inspect AC filter and determine if a ground strap (item 1 in illustration)
is soldered to the bottom ground lug of the filter.
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Table of Contents
Troubleshooting
