Question about Magellan eXplorist 300 GPS Receiver
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: Screen is out
A black screen, actually purple, means that a firmware upgrade was unsuccessful. You can try to fix it by reloading the firmware, but you are most likely not going to be successful using the USB 'binary'firmware that is available.
There is some 'text' HEX firmware available on the yahoo Explorist user group. To use it though, with your USB cable, you will need to make a small circuit with 1 chip. That site shows how to do it. I am in the process of doing that for an Explorist 400 for a friend. Others have said this is the only to recover such a lost GPS. I'll keep you informed of my success when it happens. I'll probably be sending the circuit/cable I build along to other friends but could possibly fix your for you if you like.
Posted on Feb 26, 2009
You need to be brave, but it is pretty simlple. Basically you are going to clean the rubber keypad and circuit board contacts. These contacts develop a film over time that needs to be removed. That is the main reason telephone and remote control keypads fail over time.
1. Remove the battery.
2. Remove 5 screws holding the bady together and separate the backplate from the main body.
3. Now carefully lift the circuit board out of the main body. Do not disconnect anything, but be careful with the rubber seal that fits between the back and front plates.
4. With the circuit board laying flat on your work surface, remove the rubber keypad. It is held in place over the joystick. Carefully lift it off the joystick and set it aside.
5. Use a clean pencil eraser and lightly rub the contacts on the circuit board. Do the same thing on the keypad by pushing the little knobs out where you can rub them. Blow away the dust.
6. Use a Q-tip with some alcohol to clean the contacts on the curcuit board and on the keypad.
7. When the alcohol is dry, put everything back together in the opposite order.
This should be good enough, but if it does not solve the issue, then buy a rubber keypad repair kit (an example is at http://www.mgchemicals.com/downloads/appguide/appguide0206.pdf) and try again.
Posted on Apr 27, 2009
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