GARMIN 8400/8600 Series Unveiling New High Resolution User Manual

GARMIN 8400/8600 Series Unveiling New High Resolution

Product Usage Instructions

Repairing and maintaining the GPSMAP 8400/8600 series chartplotter can be complex and dangerous. Follow these safety guidelines:

• Disconnect the device from power before opening it for service.
• Avoid working around high-voltage components on the circuit boards.
• Follow Garmin’s guidelines for static discharge protection and a dust-free environment.
• Ensure all gaskets are correctly reinstalled to maintain water resistance.
• Perform troubleshooting procedures on the boat to identify the failed component.
• If the issue is not obvious, boot the chart plotter in test mode to diagnose the problem.
• Insert a memory card into the card slot on your computer.
• Install the Garmin ExpressTM app and select your vessel and device.
• Download and copy the software update to the memory card.
• Eject the memory card and insert it into the chart plotter to update the software.
• Access System Information in Settings to activate Test Mode.
• Use the Test Mode screen to identify hardware and software issues.
• Special cables or Garmin Marine Network devices may be required for certain tests.

FAQ

• Q: Is it safe to repair the chartplotter myself?
• A: Repairing Garmin electronics can be risky. Follow safety guidelines and consider professional repair services.
• Q: How often should I update the software?
• A: Regular software updates are recommended to ensure optimal performance and compatibility with new features.

GPSMAP® 8400/8600 Series Field Service Manual

• Use this manual to identify and replace certain failed components of a GPSMAP 8400/8600 series chartplotter.

WARNING

• 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.

NOTICE

• Garmin is not responsible for and does not warrant, the work that you or a non-authorized repair provider perform on your product.
• 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 chart plotter to maintain water resistance.

Tools Needed

• A 16 to 32 GB memory card formatted in FAT32 (to update the chartplotter)
• An SD card reader (8400/8600 series SD card reader).
• A 10 to 35 Vdc, 6 to 10 A power supply (for bench testing)
• T6 screwdriver (removing the case screws)
• 14 mm, 16 mm, 21 mm, and 29 mm wrenches or sockets (removing the nuts on each port)
• Torque wrench (pneumatic) with:
  • 14 mm, 16 mm, 21 mm, and 29 mm sockets (securing the nuts on each port)
  • T6 bit (securing the case screws)
• Replacement part kit (specified in the repair topic)
• Voltmeter
• NMEA 2000 cable (testing NMEA 2000 ports)
• Garmin Marine Network cable (testing Network ports)

Important Information Regarding the Field Repair

• This manual covers the repair of all GPSMAP 8400/8600 series chart plotters.
• Before performing any service to the chartplotter, ensure that the system software is up to date. If it is not, you should update the software. Only proceed with the service if the software update does not resolve the issue.
• Record the serial number or unit ID of your chartplotter. The serial number or unit ID will be needed when you order replacement parts.
• Replacement parts are available through Garmin Product Support.
• Call your regional Garmin product support group to speak with a representative.
  • In the USA, call 866-418-9438
  • In the UK, call 0808 238 0000.
  • In Europe, call +44 (0) 870 850 1241
• Never use replacement parts from other chart plotters, even from the same model. Order all replacement parts from Garmin Product Support to ensure compatibility with your chartplotter.
• Although some replacement kits include cables, if the original cables are in good working condition, you should use them instead of the new ones supplied in the kit.
• Each time you remove copper tape from internal components, you must replace it. Copper tape is supplied with applicable parts kits.

Troubleshooting

Important Troubleshooting Information
If possible, you should perform troubleshooting procedures while on the boat to best determine the failed component. If the repair need is not readily apparent, such as a broken keypad or a broken power connector, you should boot the chart plotter in test mode to identify the failed components.

Software Update
Before performing any service to the chartplotter, ensure that the system software is up to date. If it is not, you should update the software. For the instructions on how to update the software using the ActiveCaptain® app, see the owner’s manual a\t support.garmin.com.

Loading the New Software on a Memory Card

1. Insert a memory card into the card slot on the computer.

2. Install the Garmin Express™ app.

3. Select your vessel and device.

4. Select Software Updates > Continue.

5. Read and agree to the terms.

6. Select the drive for the memory card.

7. Review the reformat warning, and select Continue.

8. Wait while the software update is copied to the memory card.
   NOTE: Copying the update file onto the card may take from a few minutes up to a few hours.

9. Close the Garmin Express app.

10. Eject the memory card from the computer.

Updating the Device Software
Before you can update the software, you must obtain a software-update memory card and an SD card reader.

1. Turn on the chartplotter, and wait for the home screen to appear.
   NOTE: In order for the software update instructions to appear, the device must be fully booted before the card is inserted.

2. Connect an SD card reader to the device.

3. Insert the memory card, and press it in until it clicks.

4. Select Update Software > Yes.

5. Wait several minutes while the software update process completes.
   The device returns to normal operation after the software update process is complete.

6. Remove the memory card.

NOTE: If the memory card is removed before the device restarts fully, the software update is not complete.

Test Mode Screen
The Test Mode screen provides hardware diagnostics and software information.
Use the test mode screen to identify problems. Any failed tests could be problematic and should be examined further.
NOTE: Testing the NMEA 2000 and Garmin Network functionality requires either a special cable or a known working Garmin Marine Network device.

Activating Test Mode

1. Select Settings > System > System Information > Software Information.
2. Hold above the software version number ➊ until the screen changes.
3. Select Field Diagnostics > Test Mode.
   To navigate the Test Mode Screen, select a board or a test from the options on the right side of the screen.

Testing

Testing the Display

Testing the Display Output
You can test the display or troubleshoot the video output by using the test mode.

1. Turn on the device in test mode, and wait 2–3 minutes for the self-tests to complete.

2. Select Color Pages.
   The screen will be completely white.

3. Select Next or Previous to cycle through color pages.

4. Use the white, black, red, green, and blue screens to determine if the display or the video output is working correctly.

5. Select Main Page to exit the color page at any time.

Note: Verify the cable connections to the screen are secure before replacing any components. A screen failure requires replacement of the front case assembly.

Testing the Touchscreen
If the touchscreen on the chart plotter does not correctly recognize touch input, you can test it by using the test mode.

1. Turn on the device in test mode, and wait 2–3 minutes for the self-tests to complete.

2. Select Touchscreen test.
   Red lines appear on the screen.

3. Swipe across each line and observe the behavior:

   • If each line changes from red to green when you swipe across it, then the touchscreen is functioning correctly. You may have to swipe across the bars multiple times to get each bar to turn green.
   • If each line does not change from red to green, then the touchscreen is not functioning correctly.

4. Press the Power key to exit the touchscreen test at any time.

Testing the Power Button Board

1. Activate test mode.
2. On the main page, observe the Push Button field. Confirm the field says UP when the power button is not pressed and DOWN when it is pressed.
3. Select the Display Page button and confirm you can hear the beeper.
4. On the Display page, observe the Light Sensor mV. Confirm the voltage is less than 500 mV while covering the sensor with a thumb and greater than 3000 mV while in full sunlight.

If a failure is detected during any step while testing the power button board, then replace the power button board.

Locating Problems
Use the following table to locate the source of problems with specific systems.

NMEA 0183

Connectors

Wi-Fi / Bluetooth ANT

J1939

ICB Board| Backlight Beeper
Power Button Board| Power Key Photocell

Testing NMEA 0183
If you are experiencing problems with NMEA 0183 data transmission, you will need to connect a known working cable before you can identify NMEA 0183 problems on the Test Mode screen.

1. Connect a test NMEA 0183 cable to the device, as shown below.
2. Turn on the chart plotter in test mode.
3. On the test page, examine the results on the SERIAL field.
   • If the ports are working correctly, the field displays PASS.
   • If the field displays FAIL, then there is a problem with NMEA 0183. See Locating Problems for more information.

Connecting a Test Power Cable

NMEA 0183 Diagram

2

Output port 1| TX/A (-) TX/B (+)| Gray Pink| 3

4

Input port 2| RX/A (-) RX/B (+)| Brown Brown/White| 5

6

Output port 2| TX/A (-) TX/B (+)| Blue Blue/White| 7

8

Input port 3| RX/A (-) RX/B (+)| Violet Violet/White| 9

10

Input port 4| RX/A (-) RX/B (+)| White/Black Red/White| 11

12

N/A| Audio Common| Blue/Red| 13
N/A| Audio Right Channel| Red| 14
N/A| Audio Left Channel| White| 15
N/A| Alarm| Yellow| 16
N/A| Accessory On| Orange| 17
N/A| Ground (Shield)| Black| 18
N/A| Spare| N/A| 19

1. Connect Output Port 1 TX/A- to Input Port 1 RX/A- and Input Port 2 RX/A-
2. Connect Output Port 1 TX/B+ to Input Port 1 RX/B+ and Input Port 2 RX/B+
3. Connect Output Port 2 TX/A- to Input Port 3 RX/A- and Input Port 4 RX/A-
4. Connect Output Port 2 TX/B+ to Input Port 3 RX/B+ and Input Port 4 RX/B+

Testing NMEA 2000

1. Connect an NMEA 2000 device on the network with the device.
2. Verify the NMEA 2000 device appears on the device list.

Testing HDMI Input

1. Connect the device to an input source, such as a laptop or DVD player.
2. On the device, select A/V, Guages, Controls > Video.
3. From the video screen, select Menu > Source.
4. Select the source of the video feed.
5. Verify the video functions correctly.

Testing HDMI Output

1. Connect the device to a television.
2. Verify the chartplotter image is reproduced on the television.

Testing Composite Video

1. Connect the device to an input source, such as a GC10 or a DVD player.
2. On the device, select A/V, Guages, Controls > Video.
3. From the video screen, select Menu > Source.
4. Select the source of the video feed.
5. Verify the video functions correctly.

Testing J1939

1. Connect the device to a J1939 network.
2. Verify the device is receiving engine data from the network.

Testing Wi-Fi

1. On the device, select Settings > Communications > Wi-Fi® Network > Wi-Fi®.
2. Verify the Wi-Fi setting is turned on.
3. On a smartphone or compatible mobile device, enable Wi-Fi technology and search for the chartplotter wireless network.
4. Verify the chartplotter wireless network is visible on your compatible smartphone or mobile device.

Testing ANT

• Connect a compatible Garmin device, such as a Marine Remote, and verify you can use it to scroll through the menu.

Disassembly and Reassembly Procedures
NOTICE

• Observe the cable connections during all parts of the following repair procedures. If at any point during this procedure, you notice a cable is disconnected, connect the cable and repeat any applicable test procedures.

Separating the Housings

NOTICE

• Before opening the housing, ensure you have static discharge equipment in place.
• Before you can access the main CPU board, you must first open the rear housing.

Separating the Rear Housing from the Front Housing

1. Position the device so the logo is upside down when facing you.
2. Remove the screws ➊ from the perimeter of the device that fasten the rear housing to the front housing.
3. Carefully lift the top of the rear case.
4. Disconnect the two cables ➋ from the rear case assembly.

Removing the Main Board

1. Separate the housings.

2. Remove the nuts ➊, weathercaps ➋, and washers ➌ from each port on the rear case assembly.
   Screw or Nut| Socket or Bit Size| Torque Measurement
   ---|---|---
   Garmin Marine Network port| 29 mm socket| 15 kgf/cm
   Power/data and transducer ports| 21 mm socket| 11 kgf/cm
   NMEA 2000 port| 16 mm socket| 7 kgf/cm
   BNC port| 14 mm socket| 11 kgf/cm

3. On the inside of the rear case assembly, remove the screws ➍ securing the main board to the rear case.

4. Remove the two screws securing the ANT / BLE antenna wire ➎.

5. Remove the two screws securing the Wi-Fi antenna wire ➏.

6. Carefully lift the main board and antennas out of the rear housing.

Removing the ICB Board

1. Separate the housings.
2. Disconnect the four cables ➊ leading to the ICB board.
3. Remove the four screws ➋ securing the ICB board to the front case assembly.

Removing the Power Button Board

1. Disconnect the cable ➊ leading to the power button board.
2. Remove the two screws ➋ securing the power button board to the front case assembly.

Reassembling the Housing

NOTICE
After you have replaced a component or completed a repair, it is vital that you correctly reassemble the unit housing to ensure IEC 60529 IPX7 water resistance.

1. Ensure that all replaced or repaired components are properly installed, and that all of the internal cables are connected.
2. Ensure the blue thermal paste is kept in place.
3. Examine the large gasket along the rim of the device.
   • Replace the gasket if it is damaged or distorted.
   • Ensure that the gasket channel and the gasket are free of dust and debris.
   • The gasket will only fit one way, and will loosely fit into the channel along the edge of the housing when installed correctly.
4. Examine the O-rings around each of the connectors.
   • Replace any O-rings that appear damaged or distorted.
   • Ensure O-ring channels and gaskets are free of dust and debris.
5. Ensure the large gasket is in place and the cables are not pinched by the lid.
   • The lid will fit snugly on the main housing. You should not force the lid closed.
6. 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.

Repair Procedures

Replacing Weather Caps
If the weather caps are worn or damaged, you can replace them.
Kit required:

1. Remove the hex nut, spacer, and all remaining pieces of the original weathercap.
2. Replace the weathercap, spacer, and hex nut.
3. Using a torque wrench with the appropriate socket, tighten the nut around the connector according to the values in the table.

Replacing the Rear Housing
Each model of the 8400/8600 series chartplotters has a single replaceable rear housing.
Kit required

1. Separate the housings.
2. Install the replacement rear housing.
3. Reassemble the housing.

Replacing the Front Case Assembly

• Each model of the 8400/8600 series chartplotters has a single replaceable front case assembly. The front case assembly includes the screen

Kits required

1. Open the housing.
2. Remove the ICB board.
3. On the replacement front case, install the ICB Board you removed in step 2.
4. Reassemble the housing.

Replacing the Main Board
Kits required

1. Open the housing.
2. Remove the main board and antennas.
3. Secure the replacement board and antennas to the rear case using the screws removed in step 2.
4. Reassemble the housing.

Replacing the ICB Board

Kits required

1. Separate the housings.
2. Remove the ICB board.
3. Secure the replacement ICB board to the front case assembly using the screws removed in step 2.
4. Connect the cables to the replacement board.

Replacing the Power Button Board
Kit required

1. Separate the front and rear housings.
2. Remove the power button board.
3. Replace the power button board and connect the cable to the main board.
4. Reassemble the housing.

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Information in this document is subject to change without notice. Garmin reserves the right to change or improve its products and to make changes in the content without obligation to notify any person or organization of such changes or improvements. Visit the Garmin website (www.garmin.com) for current updates and supplemental information concerning the use and operation of this and other Garmin products.
Garmin®, the Garmin logo, ActiveCaptain®, and GPSMAP® are trademarks of Garmin Ltd. or its subsidiaries, registered in the USA and other countries. Garmin Express is a trademark of Garmin Ltd. or its subsidiaries. These trademarks may not be used without the express permission of Garmin.

References

• Garmin | UK | Support Centre
• Garmin International | Home

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