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Maintenance
THS710A, THS720A, THS730A & THS720P Service Manual
6–3
Inspection — Exterior. Inspect the outside of the TekScope instrument for
damage, wear, and missing parts. Instruments that appear to have been dropped
or otherwise abused should be checked thoroughly to verify correct operation
and performance. Immediately repair defects that could cause personal injury or
lead to further damage to the instrument.
Cleaning Procedure — Exterior. To clean the TekScope instrument exterior,
perform the following steps:
1. Remove loose dust on the outside of the instrument with a lint free cloth.
Use care to avoid scratching the clear plastic display filter.
2. Use a soft cloth or paper towel dampened with water to clean the instrument.
You can use a 75% isopropyl alcohol solution for more efficient cleaning.
CAUTION. To avoid damage to the surface of the TekScope instrument, do not use
any abrasive or chemical cleaning agents.
Inspection — Interior. During normal use, the TekScope instrument case seals the
internal components against common dust and dirt. However, if it appears that
the instrument may have been damaged or has been exposed to an unusually
dirty or wet environment, you should inspect and clean the interior.
To inspect and clean the interior, disassemble the instrument according to the
procedure Complete Disassembly on page 6–23.
Inspect the internal portions of the instrument for damage and wear using
Table 6–1 as a guide. Defects found should be repaired immediately.
Table 6–1: Internal inspection check list
Item Inspect For Repair Action
Front and Back
Cover
Cracks or deformations. Scratched
lettering or display filter. Loose
connectors or labels.
Repair or replace defective hard-
ware.
Hole Plugs, Gasket
and Foam Pads
Misplaced or missing pieces. Relocate or replace defective
pieces.
Circuit boards Loose, broken, or corroded solder
connections. Burned circuit
boards. Burned, broken, or
cracked circuit-run plating.
Remove failed module and replace
with a new module.