Revision B4-14
Troubleshooting: General Fault Isolation
MAC 5000 resting ECG analysis system
2000657-002
General Fault Isolation
Visual Inspection
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.
Take the time to make all the recommended visual checks before
starting any detailed troubleshooting procedures
Power-up Self-test
On power-up, the system automatically runs an internal self-test. If all
circuits test good, the start up screen displays.
Table 4-6. Visual Inspection List
Area Look for the following problems
I/O Connectors and Cables
■ Fraying or other damage
■ Bent prongs or pins
■ Cracked housing
■ Loose screws in plugs
Fuses ■ Type and rating. Replace as necessary.
Interface Cables
■ Excessive tension or wear
■ Loose connection
■ Strain reliefs out of place
Circuit Boards ■ 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
Ground Wires/Wiring
■ Loose wires or ground strap connections
■ Faulty wiring
■ Wires pinched or in vulnerable position
Mounting Hardware ■ Loose or missing screws or other hardware, especially fasteners used as connections to
ground panes on PCBs
Power Source
■ Faulty wiring, especially AC outlet
■ Circuit not dedicated to system
(Power source problems can cause static discharge, resetting problems, and noise.)
To Next Page
Loading...
Need help?
General
