Tomtom One - Recent Questions, Troubleshooting & Support - Page 8

blown voltage regulator, repair centre visit

which chip, methods vary

needs a new touchpad

Attached is a sequence of photos on how to get to and change the power control chip - the one that is probably damaged. This is for the Tom Tom I repaired and yours could be different however, there will be a power control chip of some kind (check out the part numbers to see which one it is) and it will be this that is damaged and will need replacing. The Power control chip is the hardest to replace as you cannot get to the 'legs' to solder them. To remove the old one, just apply a large soldering iron bit (with a blob of solder on it to make good thermal contact to the top of the chip) and heat up the whole chip until it is free. Lift it off straight away with tweezers. Clean up the solder pads with solder wick and then apply a SMALL amount of solder paste to each pad. It is improtant that this is a SMALL amount and is equal on all pads so the new chip sits square and true when you put it on. Make sure the chip is in the middle of the pad patern and push it into place. Now for the tricky part....either usa a large soldering iron and heat the chip until it melts the solder paste and drops into place or, use a hot air gun with a small nozzle and do the same thing. Great care needs to be taken to ensure you do not heat up the near by parts so the soldering iron is best but you have to remove it as soon as the chip falls into place. The surface tension of the solder should centre the chip up if it is slightly out but you need to get it possitioned as good as you can before you heat it up. Take care not to move the chip as you heat it. You will need a fine bit in the soldering iron for the diode and any other parts you may need.

You should start with TT1 and work through to TT7.

As well as this chip, if the power supply went high (12 volts) then the zener diode on the input to this chip will also have been destroyed - you should see signs of this just by looking at the device (see photo TT6)

The most difficult bits are: -

Opening the connector to the LCD. This can be done by gently lifting up the PCB to see the connector on the back and then pushing up the 2 ends of the connectors white locking bar. Replacement is also very tricky but with care it can be done. As an alternative, you can remove the LCD complete by gently flexing the plastic surround to it and freeing the display from the case. It is then easy to disconnect and re-connect the LCD to the PCB.

Removing the tin cover from the back of the PCB so that you can get to the power control chip. This takes time and a hot soldering iron with good solder wick to remove the solder. Having liberated a couple of lugs you can remove the others by gently lifting the cover near to a lug and heating that lug to pull it through the PCB. Don't burn your fingers though!

The parts are easy to obtain from either Farnell or RS Components - RS have trade counters you can go to and Farnell have a retail side CPC you can find them at http://cpc.farnell.com/. If you have problems let me know and I will see what I can do.

Should be under tools or Planning Preferences

Look real close for a small hole that might be a reset hole. If so open a paperclip and gently push the reset. You should be able to feel it depress.

If reset not worked, then must open up, take out battery and then reset, then you must hook up USB and upgrade software, also maybe need to get new battery too, often battery seems OK, but not,.

You may be able to go the TomTom website and download the last update programming. If the problem is software this should fix it.

have you checked to make sure that you have a live line? you may have a blown fuse. I would try connecting something else to the outlet and see if it gets power.

Yes. Download tomtom HOME onto your PC. Maps cost money, they're not free

Touchpad is damaged and needs to be replaced with a new one. http://compu-sat.co.uk/repairs%20lcd%20&%20touch%20pads.html

Download 'tomtom HOME' from the tomtom website and follow the instructions. Maps and cameras carry a payable fee www.tomtom.com

To update your unit you must create an account by supplying a valid email address. I suppose this is akin to a registration.
To effect that you install the Tomtom Home software on your computer. Then you connect the unit to the computer. When it asks you if you want to connect to the computer, tap Yes and the HOME software will open allowing you to update maps etc. You will be asked to create an account.

http://www.tomtom.com/support/index.php?Language=1&query=no+maps+found&FID=9838

this problem just happened to me. i'd just bought my new tomtom one and tested it on the journey home. all was well and i was really impressed. that was until I got it home and went to update it to get the latest maps for my area. I installed all the software as instructed by the on screen prompts and downloaded the latest updates. i then went to turn the device on, and was greeted by a message stating ''no maps found!''

after almost two hours of complete frustration, i then tried probably the easiest solution anyone could think of:

First of all, connect the device to your computer and close down tom tom home. (making sure it isn't even open in the system tray).

Now, open my computer and find the device. it will be labelled as a storage device (mine was drive G). Open it up and find where the maps are saved to. Something like, UK and Ireland, or something similar relating the place you live. Once located, delete them manually.

Now, reopen tomtom home and go to tools. Click ''use latest map guarantee''. It will then download the maps again and install them onto the device.

Next disconnect using the option 'disconnect device'' from the device menu.

Finally turn on your tom tom if it doesn't automatically, and you should be back in business. This worked for me, after trying numerous way more complicated solutions I found in various forums.

Hope it works for you too!
xx

yes there is a fuse on the adaptor end
unscrew it and put a new one in.

You cant, it doesnt have a tracking device.

first of all make sure there is a clear line of sight with the sky ( middle on the bottom of the window) also important make sure the charger connects well. sometimes it needs a long time to find so try fixing satelite position while not moving for example at home near open window while charging

You need to install new navcore for your device,and after that instal maps.

Just buy another GPS, a lot of devices have internal batteries and are not supposed to be changed/replaced, for the effort and the cost of the new battery and screw drivers and the time to pull it apart would be easier just to buy another second hand, plus if anything breaks while trying to fix it your stuffed