Agilent Technologies 5517B, User Manual

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40 Agilent 5517B/BL/C/D/DL/FL User’s Guide
5
Adjustments
Introduction
This chapter describes adjustments and checks required to return the laser
head to peak operating capabilities when repairs have been made or
performance problems exist. Included in this chapter are the test
equipment required, equipment setups, and procedures to perform the
adjustments. The adjustments apply to all laser heads.
For all other laser heads, the type of A3 Controller/Reference Board
installed depends on the age of the laser head. To identify the type
installed in your laser head, refer to
Figure 8 on page 27.
Safety Considerations
WA RNI NG
Maintenance described herein is performed with power supplied to
the equipment and with the protective covers removed. Such
maintenance should be performed only by service-trained personnel
who are aware of the hazards involved (for example, fire and
electric shock). Where maintenance can be performed without
power applied, the power to the equipment should be removed.
Before any repair is completed, ensure that all safety features are
intact and functioning, and that all necessary parts are connected
to their protective grounding means.
WA RNI NG
From 1.2 kilovolts to 12 kilovolts DC is present on the anode of the
laser tube in the laser head. Exercise extreme caution when
working inside the instrument. The high voltage could cause
serious personal injury if contacted. The following adjustments
should be performed by service-trained personnel.
CA UTI ON
Always turn off, or disconnect, the laser head power supplies
before connecting or disconnecting the laser head cable to or from
the laser head rear panel.