Maintenance
4
Keysight 478A Operating and Service Manual
41
Removal Procedure
1
Remove three 2-56 x 3/16 screws holding terminal shield (
). Move
terminal shield aside.
Figure 4-4
Model 478A Thermistor Mount Assembly
2
Loosen locknut and remove 5/16-32 setscrew from thermistor assembly.
3
Disconnect the three wires between the printed circuit assembly and the
receptacle connector from the printed circuit assembly.
4
In early thermistor assemblies there is a 00-90 x 1/8 screw used to connect the
RF Thermistors to the Type N center conductor. Remove this screw, if present,
using small screwdriver and tweezers.
5
Remove the three 2-56 x 5/8 inch screws holding printed circuit and
thermistor assemblies to the RF connector assembly.
CAUTION
Do not break wires connecting printed circuit assembly to receptacle
connector.
Содержание 478A
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Страница 45: ...Keysight 478A Thermistor Mount Operating and Service Manual 45 A Appendix A Introduction 46 Manual Changes 47...