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1693 RLC Digibridge
Figure 5-9: Screws holding the interface assembly on the rear panel
3. Remove the interface option (or the blank
cover plate) horizontally, directly away from
the front panel.
CAUTION
Observe precautions while handling
the interface option. Because there
are static sensitive parts on the board,
DO NOT TOUCH THE CIRCUITS or ICs.
Refer to Section 5 of this manual, for
recommended handling procedure.
To install the interface option, proceed as follows:
1. Hold the interface option by its rear panel,
so that the labels near the connectors read
"right-side up."
If you look through the opening in the rear, you will see
an open connector. The contact edge of the interface
board is going to have to slide in there.
2. Press the interface fully into the Digibridge
by hand, confirming that alignment is correct.
3. Reinstall the screws.
5.5.4 Removal of Multiple-Pin
Packages
Use caution when removing a plug-in integrated-
circuit or other multiple-pin part, not to bend pins
nor stress the circuit board. Withdraw the part straight
away from the board. Unless an IC is known NOT to
be a static sensitive type, place it immediately on a
conductive pad (pins in the pad) or into a conductive
envelope.
DO NOT attempt to remove a soldered-in IC package
unless you have the proper equipment and skills to
do so without damage.
122
5.6 Periodic Maintenance
5.6.1 Care of Test Fixtures
For best results and minimum maintenance effort, the
operator must remove any obvious dirt from leads
of DUTs before inserting them into any test fixture.
Test fixture contacts will wipe through a thin film of
wax, but they can become clogged and ineffectual if
the operator is careless about cleanliness. The unit
should be cleaned monthly with a soft brush and
isopropyl alcohol. Avoid getting excess alcohol on
painted surfaces to avoid possible damage. The test
fixture and its axial adaptors should be cleaned once
a year as follows:
1. Use compressed air to blow away any dust
on the surface as well as inside the fixture.
2. Clean the contact surfaces and blades of the
axial-lead adaptors with isopropyl alcohol.
Rub with a cotton swab (Q-tip). Remove
any remaining alcohol with compressed air,
and remove any remaining cotton fibers with
tweezers.
5.6.2 Care of the Display Panel
Use caution when cleaning the display window, not to
scratch it or to get cleaning substances into the instru-
ment. Use a soft cloth, a lint-free wiper, or absorbent
cotton moistened with a mild glass cleaner, such as
plain Windex. DO NOT use paper towels.
If it becomes necessary to place marks on the win-
dow, use paper-based masking tape (NOT any kind of
marking pen, which could be abrasive or react chemi-
cally with the plastic). To minimize retention of any
gummy residue, remove the tape within a few weeks.
Service and Maintenance
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