Operation & Service Manual
Section IV
Model 1805B RF Control Unit
Testing
Table 4-1 Inspection
ITEM
INSPECTION
Capacitors
Cracked, blistered, or dented; broken or loose seals or leads; signs of leakage
(polarized tantalum capacitors); loose or missing mountings.
Castings, Housings
Dents, cracks, scratches, or other damage; loose or missing handles, brackets,
or mounting hardware; damaged mounts; corrosion or excessive dirt.
Connectors
Bent, broken or corroded pins; Cracked or broken inserts; cracked or broken
shell; loose or missing mounting nuts, washers, or screws; improper saddle
clamp installation.
Diodes
Signs of overheating; cracked or broken case; seals or leads.
Hardware
Stripped threads, missing washers, corrosion, or other signs of damage.
Intergrated Circuits
Signs of overheating; cracked or broken case; broken seals or leads.
Internal Wiring
Frayed, broken, or abraded insulation; improperly dressed or tied cables;
broken, corroded, or poorly soldered conductors at the terminals; missing or
damaged sleeving at connector terminals.
Painted Surfaces
Scratches, chips, or peeling.
Performed Packing
Nicks, burrs, or foreign materials present.
Printed Circuit Boards Broken or loose wires; damaged circuit traces (clad); damaged components or
chassis; loose, missing, or damaged wires, cables, or hardware; poorly
soldered connections; bent or broken connector pins.
Relays
Damaged castings; loose or missing terminals or connectors.
Resistors
Cracked, broken, blistered, or charred body; broken or corroded leads; loose
or missing mountings.
Switches
Signs of overheating; loose or broken terminals; lack of positive action.
Terminal Boards
Cracked, broken, blistered, or charred body; broken, loose, or corroded leads.
Chassis Cleaning
Clean chassis using a lint-free cloth (Table 1-
2
) moistened with water and mild detergent. For
harder to clean areas, such as inside corners of chassis, use a vacumn cleaner.
Connector Cleaning
Where small amounts of rust, corrosion, and/or oxide deposits are present on connectors, clean
externally with a soft-bristle brush (Table 1-
2
), aluminum wool, or internally with an acid
brush; then wash with a non-corrosive solvent.
Isopropyl alcohol
is recommended. Exercise care
to ensure no metal filing or residue remains inside the connector and the connector is
thoroughly dry. Where rust, corrosion, and/or oxide deposits are present in large quantities,
replace the connector.
4-3
