BK Radio P150, Service Manual

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BK Radio Page 5-5
maintenance
Systems Board assembly
1. Disconnect the flex circuits connecting the Systems Board to the side connector and display assembly.
2. Disconnect the speaker.
3. Remove the two screws holding the Systems board to the housing.
4. Lift the board from the top to remove.
Shields
Most shield on the KNG are press on type and can be removed by gently prying the lid.
Some require unsoldering before removal.
5.4.4 aSSemBly
To assemble the unit, complete the disassembly procedure in reverse order.
5.5 overhaul
5.5.1 viSual inSpection
This section contains instructions to assist in determining, by inspection, the condition of KNG
assemblies. Defects resulting from wear, physical damage, deterioration, or other causes can be found
by these inspection procedures.
capacitors
Inspect capacitors for case damage, body damage, and cracked, broken or charred insulation. Check
for loose, broken, or corroded terminal studs, lugs, or leads. Inspect for loose, broken, or improperly
soldered connections. On surface mounted capacitors, be especially alert for hairline cracks in the body
and broken terminations.
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.
coils
Inspect all coils for broken leads, loose mountings, and loose, improperly soldered connections. Check
for crushed, scratched, cut, or charred windings. Inspect the windings and connections for corrosion or
physical damage. Check for physical damage.
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.
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.