7-1
CHAPTER 7
SERVICING
This chapter explains how to replace the Model 48C subassemblies. Fault location is
accomplished in the preceding chapters of “Preventive Maintenance” and
“Troubleshooting.” This chapter assumes that a subassembly has been identified as
defective and needs to be replaced. For additional service assistance, see “Servicing
Locations” later in this chapter.
SAFETY PRECAUTIONS
Some internal components can be damaged by the discharge of static electricity. To
avoid damaging internal components, follow these precautions when performing any
service procedure:
Wear an antistatic wrist strap that is properly connected to earth ground (note that
when the analyzer is unplugged, the chassis is not at earth ground)
If an antistatic wrist strap is not available, be sure to touch a grounded metal object
before touching any internal components
Handle all printed circuit boards by the edges
Carefully observe the instructions in each procedure
64P263/42P744
Figure 7-1. Properly Grounded Antistatic Wrist Strap
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