NAVIGAT X MK 1
056343/C
Troubleshooting Instructions
8-1
Chapter 8: Troubleshooting
8.1 Troubleshooting Instructions
The NAVIGAT X Mk 1 is a complex electronic system. In case of malfunc-
tion, it would neither be practical nor economical to carry out trouble-
shooting and servicing in the field down to the level of individual circuit
components.
Unless instructed otherwise by Sperry Marine engineering, field service
personnel should limit troubleshooting to:
•
Visual inspection of mechanical components, the master board and
wiring.
•
Continuity checks of wiring connections.
•
Checks for short circuit/overload conditions or reversed polarities.
These conditions are indicated by red LEDs on the master board.
•
Checking for on-board voltages and I/O signals. The presence of volt-
ages and signals is indicated by green LEDs on the master board.
Exact voltage levels must be checked with a voltmeter. The data con-
tent on serial I/O lines must be checked with the aid of suitable ana-
lyzing tools, such as PC-based protocol interpreters or terminal
programs.
When components on the master board, other than socketed ICs, are
assumed to cause malfunction, the complete master board assembly,
stock no. 20672, is to be exchanged.
When components on the baseplate assembly are assumed to cause
malfunction, the complete baseplate assembly, stock no. 22407, is to be
exchanged.
DANGER
When the compass is energized (main and/or backup supply present),
the gyrosphere operating voltage of 100 VAC @ 337 Hz is present on the
master PCB, the gyrosphere supply lines and across the gyrosphere con-
tacts.
When operating the compass while the housing is open, do not touch
the master PCB, the connecting cables to the gyrosphere container or
any conductive components on the container.
CAUTION
The NAVIGAT X MK 1 contains electrostatic sensitive components.
Electrostatic discharge may permanently damage components.
When servicing the NAVIGAT X MK 1, take precautions to prevent elec-
trostatic discharge. Avoid touching any of the electronic circuitry.
Содержание NAVIGAT X MK 1
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