Operating instructions

Maintenance DMH Series VHF Radio
Page 5-2 BK RADIO
C. Chassis
Inspect the chassis for deformation, dents, punctures, badly worn surfaces, damaged
connectors, damaged fastener devices, loose or missing hardware, component corrosion,
and damage to the finish.
D. RF Coils
Inspect all RF coils for broken leads, loose mountings, and loose, improperly soldered, or
broken terminal connections. Check for crushed, scratched, cut, or charred windings.
Inspect the windings, leads, terminals, and connections for corrosion or physical damage.
Check for physical damage to forms and tuning slug adjustment screws.
E. Connectors
Inspect connectors for broken parts and other irregularities. Inspect for cracked or broken
insulation and for contacts that are broken, deformed, or out of alignment. Also, check for
corroded or damaged plating on contacts and for loose, improperly soldered, broken, or
corroded terminal connections.
F. Covers and Shields
Inspect covers and shields for punctures, deep dents, and badly worn surfaces. Also,
check for damaged fastener devices, corrosion, and damage to finish.
G. Flex Circuits
Inspect flex circuits for punctures and badly worn surfaces. Check for broken traces,
especially near the solder contact points.
H. Fuse
Inspect for blown fuse and check for loose solder joints.
I. Insulators
Inspect insulators for evidence of damage, such as broken or chipped edges, burned
areas, and presence of foreign matter.
J. Jacks
Inspect all jacks for corrosion, rust, deformations, loose or broken parts, cracked
insulation, bad contacts, or other irregularities.
K. Resistors, Fixed
Inspect the fixed resistors for cracked, broken, blistered, or charred bodies and loose,
broken, or improperly soldered connections. On chip resistors, be especially alert for
hairline cracks in the body and broken terminations.