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How to Clean, Upgrade, Repair, Mod, Disassemble a GPS Navigation Device

Here is a collection of free do-it-yourself take apart instructions, disassembly pictures, upgrade and repair manuals, as well as modding and cleaning tutorials for GPS navigation devices. If you have written a guide yourself (or if you know of tips and tricks not mentioned here), please submit a new entry.



Delorme Tripmate  [external link] Self-start and external power mod (some pin-outs included).
Delorme Tripmate  [external link] This navigation device is designed to operate on 6 volts DC. You can run it off 4 AA batteries that mount inside it's case. But it's possible to modify the navigation device for a 12 volt power supply and use in APRS.
Delorme Tripmate  [external link] Installing an APRs TNC directly inside of the GPS device.
Delorme Tripmate  [external link] Building a tracker from an old GPS. Layout and Wiring diagrams from the MIM experiment.
Delorme Tripmate  [external link] How to build an adapter to work with the Tinytrak 3 APRS controller.
Fortuna GPSmart - BT  [external link] Some pictures of the internals.
Garmin GPS III  [external link] This HOWTO shows two ways to extend the battery life: you can either take apart the housing and solder a better battery in or you can build a battery pack (in German).
Garmin eTrex  [external link] Pinout of the round connector, being used with the Garmin 12, 12xl, 38, 40, 45, 48, 76, 89, 90, 92, 176, 295, GPS II, II+, III, III+, V and Street Pilot.
Garmin eTrex  [external link] How to use a piece of credit-card (or any suitable plastic) for hacking the proprietary connector.
Garmin eTrex  [external link] Dead GPS device? - How to open, disassemble and repair the navigation device.
Garmin eTrex Vista  [external link] How to fix problems with the click-stick caused by a bad electrical contact. A complete guide with detailed take apart pictures.
Garmin eTrex/eMap  [external link] How to build a GPS & data cable for the Kenwood D7A transceiver.
Garmin 38/40/45/90  [external link] Some photos of the internals.
Garmin GPSmap 76Cs  [external link] Shock-Proof your GPS to prevent unintended power-downs.
Garmin Map 176/176C  [external link] Schematics for a cable to hook a GPS to a Handspring Visor PDA.
Gumstix  [external link] Active antenna modification: the GPS Stix daughter board comes set up for passive antennas only, to get it to work with a passive antenna you need to make a small modification.
Magellan 310, 315, 320  [external link] Due to the high price of the "official" datacable, it´s worth to make an homemade cale to connect the GPS device to a PC.
Magellan 315/320  [external link] This guide shows how to make a custom data cable (in Finnish).
Magellan 2000  [external link] A picture of the innards: the 44 pin PLCC in it's socket.
Magellan Meridian  [external link] Selfmade USB data & power cable.
Magellan Meridian  [external link] How to build a custom power cable (in German).
Silva Atlas (aka Lowrance iFinder, Brunton Atlas)  [external link] 9-pin RS-232 cable pinouts.
TomTom Go 300  [archived link] Dismantling instructions and pictures.
TomTom Go Car Docking Station  [external link] Dissection with take apart pictures.
TomTom Go  [external link] Quick and dirty connector. Making a connector is quite easy. All you need is a PCB with suitably arranged traces, plus some things to act as spacers. Pieces of a PCB work great for this.
TomTom Go  [external link] A cheap and easy device stand made from a Printed Circuit Board - PCB.
T-Mobile NaviGate GPS Mouse (aka Falcom NAVI-1)  [external link] Here are instructions to remove some NMEA protocol restrictions of the GPS mouse for S60 SmartPhones.

DIY GPS Devices and Accessories

DIY DGPS  [external link] Design information for a differential GPS (DGPS) receiver.
DIY GPS Tracker  [external link] A small do-it-yourself GPS tracker device with no display, which stores waypoints on a MMC/SD card (in German).
DIY GPS Logger  [external link] A selfmade NMEA waypoint logger with serial RS-232 interface (in German).
SeaTalk NMEA Bridge  [external link] How to connect SeaTalk and other NMEA devices (in German).
DIY Frequency Normal  [external link] How to make a ham radion frequency normal based on GPS signals (in German).
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© Werner Heuser 2005-2008 · http://repair4gps.org/disassembly_gps_navigation.html · last change Fri Mar 14 2008