Question about Simrad GPS
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Posted on Jan 02, 2017
I have the same problem. All functions and settings appear to be working OK but no image. After startup time about 3.5 amps are drawm When I turn on power [transmit] amps goes up to 4.5 approx.
I have the scanner head spinning but no target images
Posted on Jun 17, 2008
Some cable test stuff
Remove the cable from the display, leave the dome connected
I thought the cable end had pin numbers but let me know if it doesn't,
the video pins are 1 and 2 which are located
either side of the key slot
Video pins 1 & 2 resistance 46 Kohms colors 1 white signal, 2
Azimuth 12 &13 resistance 10 Kohms colors 12 purple azimuth +
, 13 grey azimuth -
Trigger 4 & 7 resistance 10 Kohms colors 4 orange trigger
+ ,7 yellow trigger -
Data I/O 6 & 10 resistance 160 Kohms colors 6 green data + , 10
blue data -
Approx. +/- 5 ohms tolerance.
Below is a pin chart of the display connector
5 4 3
8 7 6
11 10 9
Other pins on display connector
Battery - pins 3 & 5 both black
Battery + pins 9 & 11 both red
Shield pin 8
Video pin 8 white
Video rtn pin 7 black
Trigger + pin 6 orange
Trigger - pin 5 yellow
Data + pin 4 green
Data- pin 3 blue
Azimuth+ pin 2 purple
Azimuth - pin 1 grey
Battery + red
Battery - Black
There was a note that some cables only have one set of battery
connections pins 5 & 9
Battery connections on 3 & 11 not present on all cables. You should
have the doubled power wires with the 4KW unit.
If the test results did not have the correct ohms then they said to
check it at the dome
If the dome checked ok, then the cable was bad, and to continuity check
the cable to confirm
a bad cable
Posted on Aug 24, 2008
Normally the bearing pulse comes from the bearing pulse generator built inside the motor. Every time the motor turns it sends a pulse down the line showing the radar that it is indeed spinning. There is also a Heading pulse that comes from an electric eye elsewhere in the housing. The other thing could be that the wire carrying the bearing pulse is not getting back to the display. More so than often, it's the motor. I would have the display sent out to be checked on a simulator if there is a marine electronicshop nearby.
Posted on Oct 30, 2009
More than likely your motor is going bad. Inside the motor is your bearing pulse generator. Replace the motor and you should be ok.
Posted on Jan 22, 2010
assuming you have checked fuses etc you may have to use it as a lunch hook for your dingy...seriuosly..don't know ow old t is but a replacement is order methinks ...just like laptops they have improved greatly now and features abound screens are bigger and better...price has also dropped?
Posted on May 27, 2012
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