IHBllWXFlnnnJirL Information
This section contains the information
to do
periodic and corrective mainte-
nance on the Laboratory DC Power Supply. This section of the manual con-
tains information on static-sensitive components, preventive maintenance,
and
removal and installation procedures.
Helpful Procedures
The following sections contain information/procedures that may be related
to
doing maintenance.
• Section 2, Operating Information, covers instructions useful when operat-
ing the oscilloscope in order to troubleshoot it.
It
also details the service
strategy and lists options for obtaining maintenance service and for re-
placing failed modules.
• Section 3, Theory
of
Operation, contains
a
circuit description at the mod-
ule,
or block level.
• Section 4, Performance Verification, contains procedures that may
be
useful
in
isolating problems to modules by testing power supply perform-
• Section 5, Adjustment Procedures, addresses after repair adjustment and
thevinterval between periodic adjustments.
It
contains
a
procedure for
adjusting the internal circuits of this power supply.
• Section 9, Diagrams, contains the schematics of the individual circuit
boards.
• Section 8, Replaceable
Parts,
lists all field replaceable modules by part
number and contains the exploded views of the power supply.
Preventing ESD
The following precautions apply when performing any maintenance involving
internal access to the instrument.
Static discharge can damage any semiconductor component in this
instrument.
This instrument contains electrical components that are susceptible to dam-
age from static discharge. Table 6-1 lists the relative susceptibility of various
classes
of
semiconductors. Static voltages
of
1
kV to 30 kV are common
in
unprotected environments.
PS28Q
&
PS2S3 Laboratory DC Power Supply Module-Level Service Manual
REV AUG
1991
6-1
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