Tektronix 070-8462-03, Instruction Manual

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1735 HD High Definition Waveform Monitor
7–1
Preventive Maintenance
Preventive maintenance consists of cleaning, visual inspection, performance
checks, and (if needed) readjustment. The preventive maintenance schedule
established for the instrument should be based on the amount of use it receives
and the environment in which it is operated. Under average conditions, sched-
uled preventive maintenance should be performed every 2000 hours of operation.
Performance Checks and Readjustments
Instrument performance should be checked after each 2000 hours of operation, or
every 12 months if used intermittently. This will help ensure maximum
performance and assist in locating defects that may not be apparent during
regular operation. The Performance Verification and Adjustment Procedure
sections.
CAUTION.
Do not allow water to get inside any enclosed assembly or component.
Do not clean any plastic materials with benzene, toluene, xylene, acetone, or
similar compounds, because they may damage the plastic.
Cleaning
The instrument should be cleaned often enough to prevent dust and dirt from
accumulating. Dirt acts as a thermal insulator, preventing effective heat
dissipation, and can also provide high-resistance electrical leakage paths between
conductors or components in a humid environment.
Clean the dust from the outside of the instrument with a soft cloth or small
brush. A brush is especially useful for removing dust from around the selector
buttons, knobs, and connectors. Hardened dirt may be removed using a cloth
dampened with a mild detergent and water solution. Abrasive cleaners should not
be used.
Clean the face of the CRT with a soft, lint-free cloth dampened in isopropyl
alcohol or glass cleaner solution. Abrasive cleaners should not be used.
Loosen dust with a soft, dry brush and remove it with low-pressure air (high-ve-
locity air can damage some parts). Hardened dirt or grease can be removed with
a cotton-tipped applicator dampened with a mild detergent and water solution.
Abrasive cleaners should not be used.
Exterior
CRT
Interior