GARMIN 18 GMR Fantom Marine Radar Instruction Manual
- July 31, 2024
- Garmin
Table of Contents
18 GMR Fantom Marine Radar
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Specifications:
- Product Name: GMR Fantom 18/18x/24/24x Radar
- Model Numbers: 18, 18x, 24, 24x
- Radar Type: Non-ionizing radiation radar
- High Voltage Presence: Yes
- Manufacturer: Garmin
Product Usage Instructions:
Warning and Safety Precautions:
1. The radar must be turned off before approaching for service
to avoid exposure to harmful electromagnetic radiation.
2. Avoid looking directly at the scanner while it is
transmitting.
3. High voltages are present in the scanner, ensure it is turned
off before removing covers.
4. Adhere to all safety warnings to prevent personal injury or
death.
Getting Started:
Tools Needed:
– Refer to the chartplotter owner’s manual for radar software
update instructions.
Radar Software Update:
– Update the Garmin chartplotter software when installing the
radar.
– Visit support.garmin.com for detailed instructions on updating
the software.
Troubleshooting:
Radar Status LED:
– Errors are reported on the chartplotter as an error
message.
– Note the error message and follow universal troubleshooting
steps before proceeding with error-specific troubleshooting.
FAQ:
Q: Where can I get replacement parts for the GMR Fantom
radar?
A: Replacement parts are available only through
Garmin Product Support. Contact Garmin Product Support for
assistance.
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Table of Contents
GMR FantomTM 18/18x/24/24x
Field Service Manual
WARNING The GMR Fantom 18/18x/24/24x radar generates and transmits non-
ionizing radiation. The radar must be turned off before approaching the
scanner for service. Avoid looking directly at the scanner while it is
transmitting, as the eyes are the most sensitive part of the body to
electromagnetic radiation. Failure to properly turn off the radar may expose
the service technician to harmful electromagnetic radiation that can result in
personal injury or death.
The GMR Fantom 18/18x/24/24x radar contains high voltages. The scanner must be
turned off before the covers are removed. While servicing the unit, be aware
high voltages are present and take the necessary precautions. The high
voltages in the scanner can take some time to decay. Failure to adhere to this
warning can result in personal injury or death.
Repairing and performing maintenance on Garmin electronics is complex work
that can result in serious personal injury or product damage if not done
correctly.
NOTICE Garmin is not responsible for, and does not warrant, the work that you
or a non-authorized repair provider perform on your product.
Important Information Regarding Field Service of the GMR Fantom 18/18x/24/24x
Radar
· Before you install or service the radar, ensure that the system software is
up to date. For instructions on updating your Garmin chartplotter software,
see your chartplotter owner’s manual at support.garmin.com. Proceed with
servicing the radar only if the software update does not resolve the issue.
· Record the serial number of your radar. You will need the serial number when
you order replacement parts.
Contacting Garmin Product Support Replacement parts are available only through
Garmin Product Support.
· For dealer specific support, call
1-866-418-9438 · Go to
support.garmin.com.
· In the USA, call (913) 397.8200 or (800) 800.1020. · In the UK, call 0808
2380000. · In Europe, call +44 (0) 870.8501241.
Getting Started 1 Tools Needed………………………………………………………………………………………..1 Radar
Software Update………………………………………………………………………….1
Troubleshooting 2 Radar Satus LED…………………………………………………………………………………..2 Error
Codes and Messages…………………………………………………………………….2
1003 – Hardware FPGA Program Fault………………………………………………..2 1004 – Input Voltage
Low…………………………………………………………………..2 1005 – Input Voltage High
………………………………………………………………….2 1013 – High System Temperature
……………………………………………………….2 1019 – Spin Up Time Out, Speed Did Not Reach Specified
RPMs 1025 – Transmit Speed Lost, Could Not Maintain Rotation Speed …………..3
Major Component Locations 6 Notes ……………………………………………………………………………………………..6
Radar Disassembly 7 Removing the Dome………………………………………………………………………………7
Reinstalling the Dome ……………………………………………………………………………7 Removing the Antenna
…………………………………………………………………………..7 Reinstalling the
Antenna…………………………………………………………………………7 Replacing the Fan
…………………………………………………………………………………8
Removing the Fan Cover and Fan………………………………………………………8 Reinstalling the
Fan………………………………………………………………………….8 Replacing the Motor
………………………………………………………………………………8 Removing the Electronics
Box……………………………………………………………8 Reinstalling the Electronics Box
…………………………………………………………8
Connector Locations 9 Electronics Box……………………………………………………………………………………..9
Antenna Position Sensor PCB…………………………………………………………………9
Replaceable Service Parts 10 Replaceable Cables
…………………………………………………………………………….10
Replaceable Service Parts 11 Replaceable Components
…………………………………………………………………….11
Getting Started
Tools Needed
· Screwdrivers #2 Phillips 5 mm hex
· Digital multimeter (volt/ohm meter) · Compatible chartplotter · 10 to 32 Vdc
power supply · High viscosity, electronics-compatible RTV compound
Radar Software Update
You must update the Garmin chartplotter software when you install this device.
For instructions on updating the software, see your chartplotter owner’s
manual at support.garmin.com. Before using this manual to troubleshoot a
problem, ensure all Garmin devices on the boat are operating on the latest-
released software version. Software updates may resolve the problem.
GMR Fantom 18/18x/24/24x Field Service Manual
1
Troubleshooting
Errors on the GMR Fantom 18/18x/24/24x are reported on the chartplotter as an
error message. When the radar reports an error, it may stop, go into standby
mode, or continue operating, depending on the severity of the error. When an
error is encountered, note the error message and perform the universal
troubleshooting steps before proceeding with error-specific troubleshooting.
Universal Troubleshooting Steps
You must perform these troubleshooting steps prior to performing errorspecific
troubleshooting. You should perform these steps in order, and check to see if
the error remains after performing each step. If the error remains after
completing all of these steps, you can proceed to the topic for the error
message you recieve to resolve the issue.
1 Update the radar and chartplotter software (page 1).
2 Examine the radar power cable and connections on the radar and on the
battery or fuse block.
· If the cable is damaged or a connection is corroded, replace the cable or
clean the connection.
· If the cable is good, and the connections are clean, test the radar with a
known good power cable.
3 Examine the Garmin Marine Network cable and connections on the radar and the
chartplotter or GMSTM 10.
· If the cable is damaged, or a connection is corroded, replace the cable or
clean the connection.
· If the cable is good, and the connections are clean, test the radar with a
known good Garmin Marine Network cable.
Radar Satus LED
A status LED is located on the product label and can help troubleshoot
installation problems.
Status LED Color and Activity
Radar Status
Solid red
The radar is getting ready for use. This should only stay red briefly before changing to flashing green.
Flashing green The radar is operating properly.
Flashing orange The radar software is being updated.
Flashing red
The radar has encountered an error. Check a connected chartplotter to see if an error message is shown.
2
GMR Fantom 18/18x/24/24x Field Service Manual
Error Codes and Messages
Major warning and severe error codes for the GMR Fantom 18/18x/24/24x radar
are displayed on the chartplotter screen. These codes and messages are a good
place to start when troubleshooting the radar. To troubleshoot an error code
from the radar, you can locate the code below and follow the troubleshooting
steps as directed.
1003 – Hardware FPGA Program Fault 1 Perform the universal troubleshooting
steps (page 2). 2 If the problem persists, replace the electronics box (page
9).
1004 – Input Voltage Low 1 Perform the universal troubleshooting steps (page
2). 2 Using a multimeter, check the input voltage level, and make sure it
meets the specification for the radar.
NOTE: The voltage specification for the GMR Fantom 18/18x/24/24x is from 10 to
32 Vdc. 3 If the input voltage is in spec, examine the internal power cable
for damage, and replace it if needed (page 11). 4 If the problem persists,
replace the electronics box (page 9).
1005 – Input Voltage High 1 Perform the universal troubleshooting steps (page
2). 2 Using a multimeter, check the input voltage level, and make sure it
meets the specification for the radar.
NOTE: The voltage specification for the GMR Fantom 18/18x/24/24x is from 10 to
32 Vdc. 3 If the input voltage is in spec, examine the internal power cable
for damage, and replace it if needed (page 11). 4 If the problem persists,
replace the electronics box (page 9).
1013 – High System Temperature 1 Perform the universal troubleshooting steps
(page 2). 2 Check the temperature in the installed location, and make sure it
meets the specification for the radar.
NOTE: The temperature specification for the GMR Fantom 18/18x/24/24x is from
-15 to 70°C (from 5 to 158°F). 3 If the temperature range in the installed
location is within spec, replace the the electronics box (page 9).
GMR Fantom 18/18x/24/24x Field Service Manual
3
1019 – Spin Up Time Out, Speed Did Not Reach Specified RPMs 1025 – Transmit
Speed Lost, Could Not Maintain Rotation Speed 1 Perform the universal
troubleshooting steps (page 2). 2 If the problem persists, use this flow chart
for further troubleshooting.
Remove the dome (page 8). Move to the minimum safe operating distance listed
in the product Installation Instructions). Turn on the radar and begin
transmitting. Observe the antenna. Does the antenna rotate?
no
yes
Inspect the drive belt for damage and ensure that it is connected to the motor drive gear and the antenna drive gear.
Go to page 5.
Is the drive belt yes Replace the drive belt
damaged?
(page 12).
no
Is the drive belt yes Reconnect the drive
disconnected?
belt.
no Inspect the motor drive gear for damage.
Is the motor drive gear damaged?
yes
Replace the motor
module (page 9).
no
Is the antenna yes
Replace the
drive gear
antenna and rotary
damaged?
joint assembly
(page 12).
no
1 Disconnect the cable connecting the motor module to the electronics box
(page 9).
2 Check the cable and the connector terminals on the cable and on the
electronics box.
Is a connector yes or cable
damaged?
no
Replace the motor module (page 9).
error unresolved
Replace the electronics box (page 9).
Replace the motor module (page 9) or electronics box (page 9).
4
GMR Fantom 18/18x/24/24x Field Service Manual
Continued from page 4. Yes, the antenna rotates.
Examine the antenna rotary joint, checking the screws that fasten
the rotary joint to the base.
Tighten or reinstall the screws.
yes
Are the screws loose or
missing?
no
1 Disconnect the cable connecting the motor module to the electronics box
(page 9).
2 Check the cable and the connector terminals on the cable and on the
electronics box.
Is a connector or cable damaged?
yes
Replace the motor module (page 9) or electronics
box (page 9).
no
Use a ferrous instrument to verify that the hall-
effect magnet is installed in the rotary joint drive
gear.
Is the hall-effect yes magnet missing?
Install a replacement magnet (215-00007-00)
using super glue. Make sure the north pole of
the magnet faces up.
no
Replace the motor module (page 9).
Is the error resolved?
no
Replace the antenna and rotary joint assembly (page 8).
Is the error no resolved?
Replace the electronics box (page 9).
GMR Fantom 18/18x/24/24x Field Service Manual
5
Symptom Radar does not appear on the chartplotter network list
No radar picture and no errors displayed “Radar Service Lost” reported by
chartplotter
Poor sensitivity and sensitivity differences between ranges
Failure With No Error Code
Possible Cause Network connection
Power connection
Processor Setup or configuration settings Antenna Main supply voltage
Power connection
Network connection
Processor Setup or configuration settings Antenna Processor
Determination
1 Inspect the network cable from the radar for damage at both ends. If
possible, check the cable for
continuity. If damaged, repair or replace the cable.
2 If a GMS 10 is installed, watch the GMS 10 LEDs for activity. If there is no
activity, check the
network cable from the chartplotter to the GMS 10. Repair or replace the cable
if needed (page 11).
3 Remove the dome (page 8) and make sure that the internal network cable is
connected to
electronics box (page 9).
4 Inspect internal network cable and connectors. Repair or replace the cable
if needed (page 11).
1 With the radar off, check the fuse in the system cable. If the fuse is
blown, replace it with a 7.5 A
slow-blow fuse.
2 Check the power cable and connectors. Repair, replace, or tighten the power
cable if needed. 3 Remove the dome (page 8) and make sure that the internal
power cable is connected to
electronics box (page 9).
4 Inspect internal power cable and connectors. Repair or replace the cable if
needed (page 11). 5 Using a multimeter, verify the voltage (1032 Vdc) at the
internal power cable, and check the cable
continuity. If voltage is not present, repair or replace the internal power
cable (page 11).
Connect the radar to a known good chartplotter, and turn on the chartplotter.
If the radar does not appear on the network list, replace the electronics box
(page 9).
Return the radar to factory default settings on the chartplotter.
Replace the antenna (page 8).
If power wires have been extended, verify that the wire gauge is correct for
the distance. The voltage drop may be too large. The appropriate guage of wire
exensions for the GMR Fantom 18/24 is: · 2 m (6.5 ft) = 16 AWG (1.31 mm²) or
larger · 4 m (13 ft.) = 14 AWG (2.08 mm²) or larger · 6 m (19 ft.) or longer =
12 AWG (3.31 mm²) or larger
1 With the radar off, check the fuse in the system cable. If the fuse is
blown, replace it with a 7.5 A
slow-blow fuse.
2 Check the power cable and connectors. Repair, replace, or tighten the power
cable if needed. 3 Remove the dome (page 8) and make sure that the internal
power cable is connected to
electronics box (page 9).
4 Inspect internal power cable and connectors. Repair or replace the cable if
needed (page 11). 5 Using a multimeter, verify the voltage (1032 Vdc) at the
internal power cable, and check the cable
continuity. If voltage is not present, repair or replace the internal power
cable (page 11).
1 Inspect the network cable from the radar for damage at both ends. If
possible, check the cable for
continuity. If damaged, repair or replace the cable.
2 If a GMS 10 is installed, watch the GMS 10 LEDs for activity. If there is no
activity, check the
network cable from the chartplotter to the GMS 10. Repair or replace the cable
if needed.
3 Remove the dome (page 8) and make sure that the internal network cable is
connected to
electronics box (page 9).
4 Inspect internal network cable and connectors. Repair or replace the cable
if needed (page 11).
Connect the radar to a known good chartplotter, and turn on the chartplotter.
If the radar does not appear on the network list, replace the electronics box
(page 9).
Return the radar to factory default settings on the chartplotter.
Replace the antenna (page 8).
Replace the electronics box (page 9).
6
GMR Fantom 18/18x/24/24x Field Service Manual
Major Component Locations
Item Description
Antenna rotary joint (see Notes)
Antenna
Electronics box
Internal network cable
Internal power cable
Fan
Fan cover
Motor (see Notes)
Antenna drive gear
Notes · Do not disconnect the antenna from the antenna rotary joint. To remove
the antenna, remove the antenna/rotary joint/drive gear assembly by following
the
disassembly procedures on page 8.
· Black models have a cap on the motor.
GMR Fantom 18/18x/24/24x Field Service Manual
7
Radar Disassembly
Removing the Dome
NOTICE Take care not to damage the rubber gasket when removing the dome. If
you damage the rubber gasket, you will need to replace it when you reassemble
the radar. 1 Loosen the 6 mm hex screws on the bottom of the radar.
The GMR Fantom 18/18x has eight screws, and the GMR Fantom 24/24x has ten
screws.
5 Align the marks on the dome and the radar housing , and place the dome on top of the radar housing.
6 Tighten the 6 mm hex screws on the bottom of the radar. The screws stop
turning when fully tightened. You cannot overtighten the screws.
Removing the Antenna
1 Remove the dome (page 8). 2 Locate the antenna mounting access hole on the
rotary drive gear.
2 Pull directly up on the dome to remove it from the bottom of the radar.
Reinstalling the Dome
1 After service is complete, ensure that all components are correctly
reinstalled.
2 Turn on the radar in standby mode and ensure that no error appears on the
chartplotter.
3 Turn off the radar. 4 Examine the rubber gasket on the radar housing.
· If the gasket is damaged, replace it (page 12). · If the gasket is out of
place, make sure it is installed correctly in the
radar housing.
3 Rotate the antenna by hand to access the screws through the antenna mounting
access hole, and remove the three #2 Phillips screws that connect the antenna
to the radar housing.
4 Disconnect the cable from the connector on the antenna position sensor PCB,
located under the rotary drive gear (page 10).
5 If you are servicing a black GMR Fantom 18x or 24x, remove the screw and cap
from the motor .
6 Lift up on the antenna to remove the antenna assembly and the antenna drive
belt .
Reinstalling the Antenna
1 Place the antenna drive belt around the rotary drive gear. 2 Lower the
antenna into the radar housing. 3 Connect the cable to the connector on the
antenna position sensor PCB,
located under the rotary drive gear (page 10). 4 Rotate the antenna by hand to
access the antenna mounting locations,
and secure the antenna to the radar housing using the three #2 Phillips screws
you removed to remove the antenna.
NOTE: The two silver screws secure the antenna to the radar housing. The
single black screw secures the antenna to the electronics box.
5 Connect the antenna drive belt to the motor. 6 If you are servicing a black
GMR Fantom 18x or 24x, replace the cap and
screw on the motor.
8
GMR Fantom 18/18x/24/24x Field Service Manual
Replacing the Fan
Even if the fan does not need to be replaced, you may need to remove the fan
cover and fan to access other components or cable connections.
Removing the Fan Cover and Fan 1 Remove the dome (page 8). 2 Remove the
antenna (page 8). 3 Disconnect the grounding cable from the motor to the
electronics box . 4 Remove the fan cover by removing the four #2 Phillips
screws that
connect it to the radar housing.
8 Using a zip tie, secure the motor cable to the radar housing (under the
electronics box).
9 Reinstall the electronics box (page 9). 10 Reinstall the antenna (page 8).
11 Reinstall the dome (page 8).
Replacing the Electronics Box
The electronics box contains the primary PCBs for the radar. You may need to
replace the electronics box to resolve a radar error. The electronics box also
covers some cables, so you may need to remove the electronics box to replace
other radar components.
Removing the Electronics Box 1 Remove the dome (page 8). 2 Remove the antenna
(page 8). 3 Remove the fan cover (page 9) 4 Disconnect all cables from the
electronics box (page 9).
5 Remove the four #2 Phillips screws that fasten the electronics box to the
radar housing.
5 Disconnect the fan power cable from the electronics box (page 10). 6 Remove
the zip tie securing the fan power cable to the radar housing. 7 Remove the
fan.
Reinstalling the Fan 1 Place the fan into the radar housing. 2 Using a zip
tie, secure the fan cable to the radar housing. 3 Connect the fan power cable
to the electronics box (page 10). 4 Reinstall the fan cover. 5 Reconnect the
grounding cable. 6 Reinstall the antenna (page 8). 7 Reinstall the dome (page
8).
Replacing the Motor
Black GMR Fantom 18x or 24x models have a protective cap on the motor gear. If
you are replacing the motor on a white GMR Fantom 18x or 24x, the cap is
optional. 1 Remove the dome (page 8). 2 Remove the antenna (page 8). 3 Remove
the electronics box (page 9). 4 Remove the zip tie securing the motor cable to
the radar housing (under
the electronics box). 5 Remove the four #2 Phillips screws that connect the
motor to the
radar housing.
6 Remove the electronics box. Reinstalling the Electronics Box 1 Place the
electronics box into the housing. 2 Secure the new electronics box to the
housing using the four #2 Phillips
screws from the original electronics box. 3 Connect all the cables to the
electronics box (page 10). 4 Apply a high viscosity, electronics-compatible
RTV compound to the cable
connectors. 5 Reinstall the fan cover. 6 Reinstall the antenna (page 8). 7
Reinstall the dome (page 8).
6 Remove the motor and the rubber pad from the radar housing.
7 Place the new rubber pad and motor in the radar housing, and secure it using
the four #2 Phillips screws that you removed in step 5.
GMR Fantom 18/18x/24/24x Field Service Manual
9
Electronics Box
Connector Locations
Item Description
Power cable connector Fan power cable connector Status LED cable connector
Antenna position sensor cable connector Network cable connector Motor cable
connector
Antenna Position Sensor PCB
1
P100
3
Item Description
Antenna position sensor cable connector
10
GMR Fantom 18/18x/24/24x Field Service Manual
Replaceable Cables
Replaceable Service Parts
Item Number
Description
Internal power cable
Internal network cable
Marine network cable, 15 m (not shown)
Antenna position sensor cable (not shown)
Kit Number GMR Fantom 18 S00-00700-15
S00-00700-14 320-01052-00 S00-00700-16
GMR Fantom 18x S00-00700-15 S00-00700-22 S00-00700-17 S00-00700-16
GMR Fantom 24 S00-00700-15 S00-00700-14 320-01052-00 S00-00700-16
GMR Fantom 24x S00-00700-15 S00-00700-22 S00-00700-17 S00-00700-16
GMR Fantom 18/18x/24/24x Field Service Manual
11
Replaceable Components
Replaceable Service Parts
Item Number
Description
Top cover (dome), white
Top cover (dome), black
Rubber housing gasket Bottom assembly
Bottom cover (white)
Bottom cover (black)
Antenna/rotary joint
Drive belt
Motor module
Fan and fan cover
Electronics box
Antenna position sensor PCB (not shown, located under the antenna drive gear)
Fantom decal, port side (not shown)
Fantom decal, starboard side (not shown)
Logo kit, white (not shown)
Logo kit, black (not shown)
Grease, gear silencer (not shown)
Kit Number GMR Fantom 18 S00-00700-05
S00-00481-00 S00-00700-06
S00-00700-04 S00-00473-00 S00-00700-02 S00-00700-03 S00-00700-01 S00-00476-00
S00-00700-10 S00-00700-11
S00-01028-00
GMR Fantom 18x S00-00700-27 S00-00700-30 S00-00481-00
S00-00700-28 S00-00700-31 S00-00700-04 S00-00473-00 S00-00700-02 S00-00700-03
S00-00700-19
GMR Fantom 24 S00-00700-08
S00-00489-00 S00-00700-09
S00-00700-07 S00-00473-00 S00-00700-02 S00-00700-03 S00-00700-01
S00-00476-00
S00-00476-00
S00-00700-29 S00-00700-32 S00-01028-00
S00-00700-12 S00-00700-13
S00-01028-00
GMR Fantom 24x S00-00700-18 S00-00700-24 S00-00489-00
S00-00700-20 S00-00700-25 S00-00700-07 S00-00473-00 S00-00700-02 S00-00700-03
S00-00700-19 S00-00476-00
S00-00700-21 S00-00700-26 S00-01028-00
12
GMR Fantom 18/18x/24/24x Field Service Manual
© 2017-2024 Garmin Ltd. or its subsidiaries
All rights reserved. Under the copyright laws, this manual may not be copied,
in whole or in part, without the written consent of Garmin. Garmin reserves
the right to change or improve its products and to make changes in the content
of this manual without obligation to notify any person or organization of such
changes or improvements. Go to www.garmin.com for current updates and
supplemental information concerning the use of this product. Information in
this document is subject to change without notice.
Garmin®, the Garmin logo, ActiveCaptain®, and GPSMAP® are trademarks of Garmin
Ltd. or its subsidiaries, registered in the USA and other countries. FantomTM,
GMRTM, and GMSTM are are trademarks of Garmin Ltd. or its subsidiaries. These
trademarks may not be used without the express permission of Garmin.
July 2024
© 2017-2024 Garmin Ltd. or its subsidiaries support.garmin.com Printed in Taiwan
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