Preventive Maintenance; Introduction; General Care; Inspection And Cleaning - Tektronix 2215A Instruction Manual

Maintenance— 2215A Service
9. Use a soldering iron that is connected to earth
ground.

INTRODUCTION

Preventive maintenance consists of cleaning, visual
inspection, lubrication, and checking instrument perform­
ance. When accomplished regularly, it may prevent instru­
ment malfunction and enhance instrument reliability. The
severity of the environment in which the instrument is used
determines the required frequency of maintenance. An
appropriate time to accomplish preventive maintenance is
just before instrument adjustment.

GENERAL CARE

The cabinet minimizes accumulation of dust inside the
instrument and should normally be in place when operating
the oscilloscope. The optional front-panel cover provides
both dust and damage protection for the front panel and crt
face, and it should be in place whenever the instrument is
stored or is being transported.

INSPECTION AND CLEANING

The instrument should be visually inspected and cleaned
as often as operating conditions require. Accumulation of
dirt in the instrument can cause overheating and component
breakdown. Dirt on components acts as an insulating
blanket, preventing efficient heat dissipation.
provides an electrical conduction path that could result in
instrument failure, especially under high-humidity conditions.
Avoid the use o f chemical cleaning agents which
might damage the plastics used in this instrument.
Use a nonresidue-type cleaner, preferably isopropyl
alcohol, denatured ethyl alcohol, or a solution o f 5%
mild detergent with 95% water. Before using any
other type o f cleaner, consult your Tektronix Service
Center or representative.
6-2

PREVENTIVE MAINTENANCE

It also
10. Use only approved
desoldering tools for component removal.
Exterior
INSPECTION. Inspect the external portion of the instru­
ment for damage, wear, and missing parts; use Table 6-2 as
a guide. Instruments that appear to have been dropped or
otherwise abused should be checked thoroughly to verify
correct operation and performance. Deficiencies found that
could cause personal injury or could lead to further damage
to the instrument should be repaired immediately.
To prevent getting moisture inside the instrum ent dur­
ing external cleaning, use only enough liquid to
dampen the doth or applicator.
CLEANING. Loose dust on the outside of the instrument
can be removed with a soft cloth or small soft-bristle brush.
The brush in particularly useful for dislodging dirt on and
around the controls and connectors. Dirt that remains can
be removed with a soft cloth dampened in a mild detergent-
and-water solution. Do not use abrasive cleaners. Clean the
light filter and the crt face with a soft lint-free cloth damp­
ened with either denatured alcohol or a mild detergent-and-
water solution.
Interior
To gain access to internal portions of the instrument for
inspection and cleaning, refer to the "Removal and Replace­
ment Instructions' in the "Corrective Maintenance" part of
this section.
INSPECTION. Inspect the internal portions of the instru­
ment for damage and wear, using Table 6-3 as a guide.
Deficiencies found should be repaired immediately. The cor­
rective procedure for most visible defects is obvious; how­
ever, particular care must be taken if heat-damaged
components are found. Overheating usually indicates other
trouble in the instrument; therefore, it is more important that
the cause of overheating be corrected to prevent recurrence
of the damage.
antistatic, vacuum-type