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Page 5-6
Service Manual - KNG Portables
maintenance
flex circuits
Inspect flex circuits for punctures and badly worn surfaces. Check for broken traces, especially near the
solder contact points.
fuse
Inspect for blown fuse and check for loose solder joints.
insulators
Inspect insulators for evidence of damage, such as broken or chipped edges, burned areas and
presence of foreign matter.
jacks
Inspect all jacks for corrosion, rust, deformations, loose or broken parts, cracked insulation, bad
contacts, or other irregularities.
potentiometers
Inspect all potentiometers for evidence of damage or loose terminals, cracked insulation, or other
irregularities.
resistors, fixed
Inspect the fixed resistors for cracked, broken, blistered, or charred bodies, and loose, broken, or
improperly soldered connections. On surface mount resistors, be especially alert for hairline cracks in the
body and broken terminations.
terminal connections Soldered
1. Inspect for cold-soldered or resin joints. These joints present a porous or dull, rough appearance.
Check for strength of bond using the points of a tool.
2. Examine the terminals for excess solder, protrusions from the joint, pieces adhering to adjacent
insulation, and particles lodged between joints, conductors, or other components.
3. Inspect for insufficient solder and unsoldered strands of wire protruding from conductor at the
terminal. Check for insulation that is stripped back too far from the terminal.
4. Inspect for corrosion at the terminal.
wiring
Inspect wiring in chassis for breaks in insulation, conductor breaks, cut or broken lacing, and improper
dress in relation to adjacent wiring or chassis.
5.5.2 cleaninG
A. Using a clean, lint-free cloth, lightly moistened with soap and water only, and remove the foreign
matter from the equipment case and unit front panel. Wipe dry using a clean, dry, lint-free cloth.
B. Using a hand controlled dry-air jet (not more than 15 psi), blow the dust from inaccessible areas.
Care should be taken to prevent damage by the air blast.
C. Clean the receptacles and plugs with a hand-controlled dry-air jet (not more than 25 psi), and
a clean, lint-free cloth lightly moistened with soap and water only. Wipe dry with a clean, dry, lint-free
cloth.
Summary of Contents for P150
Page 15: ...Page 1 6 Service Manual KNG Portables General Information BLANK PAGE ...
Page 79: ...Page 2 64 Service Manual KNG Portables Installation and Programming BLANK PAGE ...
Page 103: ...Page 3 24 Service Manual KNG Portables Operation ...
Page 111: ...Page 4 8 Service Manual KNG Portables Theory of Operation ...
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