Preventive Maintenance Equipment - HP 75000 C Series Service Manual

Maintenance described in the manual is performed with
power supplied
to
the instrument while protective covers are
removed. Energy available at many points may, if contacted,
result in personal injury. Where maintenance can be
performed without power applied, the power should be
removed.
Capacitors inside the instrument may still be charged even if
the instrument has been disconnected from its source of
supply
For continued protection against fire hazard, replace the line
fuse(s) only with 250V fuse(s1 of the same current rating and
type (for example, normal blow, time delay, etc.). Do not use
repaired fuses or short circuited fuseholders.
Caution
Static electricity i s a major cause of component failure. To prevent
damage to the electrical components in the Oscilloscope, observe anti-
static techniques whenever working on the Oscilloscope.
3-3. Preventive
Preventive maintenance for the Oscilloscope consists of periodically
Maintenance
cleaning the Oscilloscope.
Note
Hewlett-Packard recommends a 12-month interval between cleaning
the Oscilloscope. However, cleaning intervals are mostly dependent
upon where the Oscilloscope is used. The Oscilloscope should be
cleaned more often if i t is used in a dusty or very humid area.
3-4. Required
Table
3-1
shows the necessary equipment to perform scheduled
Equipment
preventive maintenance.
Table
3-1.
Preventive Maintenance Equipment
I
Description
I
Requirement
I
Warning
Soft-bristle brush
Mild Soap Solution
Lint-free cloth
Before removing the Oscilloscope from the mainframe,
make
sure the mainframe is disconnected from the power source, to
eliminate the possibility of electrical shock.
Removing dust from printed circuit card
Cleaning panel
Cleaning panel
3-2
Operating instructions