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Garmin GPSMAP 7400 Series Field Service Manual
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Garmin GPSMAP 7400 Series Field Service Manual

Garmin GPSMAP 7400 Series Field Service Manual

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GPSMAP
®
Field Service Manual
Use this manual to identify and replace certain failed components of a
GPSMAP 7400/7600 series chartplotter.
Repairing and performing maintenance on Garmin electronics is complex work
that can result in serious personal injury or product damage if not done correctly.
Components on the circuit boards hold a high-voltage charge. To be safe,
disconnect the device from power before opening it for service. If you have
power applied to the device while it is open, use caution when working around
the circuit boards located on the inside of the front housing.
Follow the guidelines set forth by Garmin regarding static discharge protection
and a dust-free repair environment to avoid damaging the chartplotter during
repair.
Verify all gaskets are reinstalled or replaced correctly when repairing the
chartplotter to maintain water-resistance.
Garmin is not responsible for, and does not warrant, the work that you or a non-
authorized repair provider perform on your product.
July 2024
7400/7600 Series
WARNING
NOTICE
Tools Needed ........................................................................................................
Series Chartplotters ..............................................................................................
Troubleshooting ....................................................................................
Important Troubleshooting Information .................................................................
Loading the New Software on a Memory Card ...............................................
Updating the Device Software ........................................................................
About the Test Mode Screen ................................................................................
Activating Test Mode.......................................................................................
Testing ..................................................................................................................
Testing the Display..........................................................................................
Testing the Touchscreen .................................................................................
Calibrating the Touchscreen ...........................................................................
Testing GPS ....................................................................................................
Testing the Power Button Board .....................................................................
Locating Problems ..........................................................................................
Testing NMEA 0183 ........................................................................................
Disassembly and Reassembly Procedures ........................................
Opening the Housing ............................................................................................
Separating the Rear Housing from the Front Housing: 7 in. and 8 in.
Models ............................................................................................................
Separating the Rear Housing from the Front Housing: 10 in. and 12 in.
Models ............................................................................................................
Removing the Connector Board: 7 in. and 8 in. Models .......................................
Removing the Main Board: 7 in. and 8 in. Models ..............................................
Removing the Main Board: 10 in. and 12 in. Models ..........................................
Removing the Main Board: 16 in. Models ...........................................................
Reassembling the Housing .................................................................................
Repair Procedures...............................................................................
Replacing the SD Card Door ..............................................................................
Replacing Weather Caps....................................................................................
Replacing the Rear Housing ...............................................................................
Replacing the Connector Board: 7 in. and 8 in. Models .....................................
Replacing the Main Board: 7 in. and 8 in. Models ..............................................
Replacing the SD Card Port ...............................................................................
Replacing the Patch Antenna: 16 in. Models ......................................................
190-01841-13_0D

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Printed in the USA

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Summary of Contents for Garmin GPSMAP 7400 Series

  • Page 1: Table Of Contents

    Separating the Rear Housing from the Front Housing: 10 in. and 12 in. Garmin is not responsible for, and does not warrant, the work that you or a non- Models ......................authorized repair provider perform on your product.

  • Page 2: Tools Needed

    • Replacement parts are available through Garmin Product Support. NOTE: Testing the NMEA 2000 and Garmin Network functionality requires either Call 866-418-9438 to speak with a representative. a special cable or a known working Garmin Marine Network device.

  • Page 3: Testing

    Testing Testing the Display Output You can test the display or troubleshoot the video output by using the test Testing the Display mode. Turn on the device in test mode, and wait 2–3 minutes for the self-tests to No image is displayed on the complete.

  • Page 4: Testing The Power Button Board

    Testing the Power Button Board Testing NMEA 0183 Boot the device in normal mode. If you are experiencing problems with NMEA 0183 data transmission, you will need to create and connect a custom power cable before you can identify Enable wireless networking and connect the device to a smartphone or NMEA 0183 problems on the Test Mode screen.

  • Page 5: Disassembly And Reassembly Procedures

    With the chartplotter face down, remove the large nuts, washers, and weathercaps from the ports, using the appropriate socket for each nut. Screw or Nut Socket or Bit Size Torque Measurment Garmin Marine Network port 29 mm socket 15 kgf/cm Power/data and transducer ports...
  • Page 6 ➋ ➋ ➌ ➌ Press down on the connectors and lift the rear housing straight up to separate it from the front housing, and tip up the rear housing to expose the components without placing stress on the internal cables. ➋...

  • Page 7: Models

    With the chartplotter face down, remove the large nuts, washers, and weathercaps from the ports, using the appropriate socket for each nut. Screw or Nut Socket or Bit Size Torque Measurment Garmin Marine Network port 29 mm socket 15 kgf/cm Power/data and transducer ports...

  • Page 8: Separating The Rear Housing From The Front Housing: 16 In. Models

    With the chartplotter face down, remove the large nuts, washers, and weathercaps from the ports, using the appropriate socket for each nut. Screw or Nut Socket or Bit Size Torque Measurment Garmin Marine Network port 29 mm socket 15 kgf/cm Power/data and transducer ports...

  • Page 9: Removing The Connector Board: 7 In. And 8 In. Models

    ➋ ➋ ➌ ➌ Disconnect all remaining cables on the bottom of the main board ➌ ➌ The housings are now separate. Removing the Connector Board: 7 in. and 8 in. Models NOTICE The main board on 7 in. models is not secured to the front case assembly. Use caution when separating the boards to prevent damage. ➊...

  • Page 10: Removing The Main Board: 7 In. And 8 In. Models

    Removing the Main Board: 7 in. and 8 in. Models ➊ ➊ Disconnect the SD port cable from the main board. ➋ ➋ Disconnect the 4-pin cable from the main board. ➌ ➌ Remove the five screws securing the main board to the screen assembly (8 in. models only). ➌...

  • Page 11: Removing The Main Board: 10 In. And 12 In. Models

    Removing the Main Board: 10 in. and 12 in. Models Separate the housings (page 7). ➊ ➊ Disconnect the cables connected to the top of the main board. ➊ ➊ Slowly lift the main board straight up and tilt it to reveal the cables beneath the board. Disconnect the cables connected to the bottom of the main board.

  • Page 12: Reassembling The Housing

    Using a torque wrench with the appropriate socket or bit, tighten the case screws and the nuts around each connector according to the values in the table Screw or Nut Socket or Bit Size Torque Measurment Case screws T6 bit or #1 Phillips 3.5 kgf/cm Garmin Marine Network port 29 mm socket 15 kgf/cm Power/data and transducer ports 21 mm socket 11 kgf/cm NMEA 2000 port...

  • Page 13: Repair Procedures

    Using a torque wrench with the appropriate socket, tighten the nut around the connector according to the values in the table Screw or Nut Socket or Bit Size Torque Measurment Garmin Marine Network port 29 mm socket 15 kgf/cm Power/data and transducer ports...

  • Page 14: Replacing The Rear Housing

    Each model of the 7400/7600 series chartplotters has a single replaceable front case assembly. The front case assembly includes the screen NOTE: You cannot replace the front case assembly on 16-inch chartplotters. You must send the device to Garmin for repair.

  • Page 15: Replacing The Front Case Assembly: 10 In. And 12 In. Models

    Each model of the 7400/7600 series chartplotters has a single replaceable front case assembly. The front case assembly includes the screen NOTE: You cannot replace the front case assembly on 16 in. chartplotters. You must send the device to Garmin for repair.

  • Page 16: Replacing The Main Board: 10 In., 12 In., And 16 In. Models

    Replacing the Main Board: 10 in., 12 in., and 16 in. Models Kits required: Chartplotter Model Kit Number Description 7410 S11-03484-10 PCB Assy,7410 Main Board WW map 7410 (J1939) S11-03484-40 PCB Assy,7410 J1939 Main Bd WW map 7410xsv S11-03484-11 PCB Assy,7410xsv Main Board WW Map 7410xsv (J1939) S11-03484-41 PCB Assy,7410xsv J1939 Main Bd WW Map...

  • Page 17: Replacing The Power Button Board: 10 In., 12 In., And 16 In. Models

    Replacing the Power Button Board: 10 in., 12 in., and 16 in. Models NOTE: Chartplotters smaller than 10 in. do not contain a power button board. Kit required: Chartplotter Model Kit Number Description 7610, 7610xsv, 7612, 7612xsv, 7616, 7616xsv S00-00533-33 7x10,7x12,7x16 Power Button Board Separate the front and rear housings (page...
  • Page 18 All rights reserved. Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated, downloaded or stored in any storage medium, for any purpose without the express prior written consent of Garmin. Garmin hereby grants permission to download a single copy of this manual onto a hard drive or other electronic storage medium to be viewed and to print one copy of this manual or of any revision hereto, provided that such electronic or printed copy of this manual must contain the complete text of this copyright notice and provided further that any unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited.

This manual is also suitable for:

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