Sperry Marine 4914-CA, Operation, Installation And Service Manual

Page: 75 / 192

k^sfd^q u jh N MRSPQPLc
mçïÉêJìé=cìåÅíáçå=qÉëí RJNP
cáÖìêÉ=RJQW
jÉ~ëìêÉãÉåí=çÑ=s^`
íêìÉ=ojp=~í=gQ
⇒
If the current is still above 320 mA, the gyrosphere may not be in
operable working condition.
12. Proceed with a visual inspection of the gyrosphere, to search any
obvious cause for malfunction, see “Gyrosphere Maintenance” in
the Installation, Maintenance and Service Procedures, 05000-0125-01
for details.
10. Measure again the VAC true
RMS at the pins 1 and 2 (wires
white and brown) of the J4 con-
nector on the NAVIGAT X MK1
master PCB to check whether
105 VAC true RMS are set.
11. Repeat steps 8 – 10 if necessary
until 105 VAC true RMS are set.
`^rqflk
Risk of defective gyrosphere
The gyrosphere may not be in operable working condition, if after a time
period of around 45 minutes after power-up the gyrosphere current has
not dropped below 320 mA.
If a visual inspection reveals no obvious cause of malfunction, the power-
up cycle of the gyrosphere must be completely repeated.
If after a time period of around 45 minutes after the second power-up
cycle the gyrosphere current has still not dropped below 320 mA, the
gyrosphere may not be in operable working condition.
Contact the Sperry Marine Service for advice.