General Fault Isolation; Visual Inspection - GE ApexPro Service Manual

General Fault Isolation

Visual Inspection

Area
I/O Connectors and
Interface Cables
Internal Harnesses
and Cables
Circuit Boards
Ground Wires/Wiring
Mounting Hardware
Power Source
Revision C
Troubleshooting: General Fault Isolation
A thorough visual inspection of the equipment can save time. Small things—
disconnected cables, foreign debris on circuit boards, missing hardware, loose
components—can frequently cause symptoms and equipment failures that may
appear to be unrelated and difficult to track.
The following tests are highly recommended to remove these "simple" failures as
causes of problems.
Set the ON/OFF switch to the OFF position and disconnect the Receiver System
from its power source.
Refer to "Disassembly/Assembly"
inspection of the components.
Take the time to make all the recommended visual checks (refer to the visual
inspection table below) before starting any detailed troubleshooting procedures.
Fraying or other damage.
Bent prongs or pins.
Cracked housing.
Loose screws in plugs.
Excessive cable tension or wear.
Secure mounting hardware.
Excessive tension or wear.
Loose connection.
Strain reliefs out of place.
Moisture, dust, or debris (top and bottom).
Loose or missing components.
Burn damage or smell of over-heated components.
Socketed components not firmly seated.
PCB not seated properly in edge connectors.
Solder problems: cracks, splashes on board, incomplete feedthrough, prior modifications or
repairs.
Loose wires or ground strap connections.
Faulty wiring.
Wires pinched or in vulnerable position.
Loose or missing screws or other hardware, especially fasteners used as connections to ground
planes on PCBs.
Receiver System mounted loosely or near vibration.
Faulty wiring, especially AC outlet.
Circuit not dedicated to system.
Symptoms of power source problems include static discharge, resetting problems, and noise.
ApexPro Telemetry Server
2001989-178
on page 6-4 and perform an internal visual
Look for the following problems:
5-3