Table 6-2: External Inspection Check List - Tektronix DG2020A Service Manual

DG2020A Service Manual
Inspection — Exterior. Inspect the outside of the DG2020A for damage, wear, and
missing parts, using Table 6-2 as a guide. If the DG2020A appears to have been
dropped or otherwise abused, check it thoroughly to verify correct operation and
performance. Repair any defects that may cause personal injury or lead to further
damage to the DG2020A.

Table 6-2: External inspection check list

Item Inspect for
Cabinet, front panel, Cracks, scratches, deformations,
and cover damaged hardware or gaskets
Front-panel knobs Missing, damaged, or loose
knobs
Connectors Broken shells, cracked insulation,
and deformed contacts; dirt in
connectors
Carrying handle, Correct operation
cabinet, feet
Accessories Missing items or parts of items,
bent pins, broken or frayed
cables, and damaged connectors
Cleaning Procedure — Exterior.
WARNING. To avoid potential electric shock hazard or damage to the DG2020A
circuits, do not allow any moisture inside the DG2020A during external
cleaning; use only enough liquid to dampen the cloth or applicator.
1. Remove loose dust on the outside of the DG2020A with a lint free cloth.
2. Remove remaining dirt with a lint free cloth dampened in a general purpose
detergent-and-water solution. Do not use abrasive cleaners.
3. Clean the light filter protecting the monitor screen with a lint-free cloth
dampened with either isopropyl alcohol or, preferably, a gentle, general
purpose detergent-and-water solution.
Inspection — Interior. To access the inside of the DG2020A for inspection and
cleaning, refer to the Removal and Installation Procedures in this section.
Inspect the internal portions of the DG2020A for damage and wear using
Table 6-3 as a guide. Repair any defects immediately.
Maintenance
Repair action
Replace defective module.
Repair or replace missing or
defective knobs.
Replace defective modules.
Clear or wash out dirt.
Replace defective module.
Replace damaged or missing
items, frayed cables, and defec-
tive modules.
6-5