Blew Fuse on my GPS

[newtoCaps101]

Fellas, Long time... I was trying to hard wire my navman ICN520 to my car, anyway I think I blew a fuse or something inside the unit or something. I stupidly cut the cigaret lighter adaptar cable in half and found 3 wires inside, Red, Black and White. So I used a ATX power supply and connected the Red and Black wire to the Yellow and Black on the power supply and it powered on for a second but then shorted and now the GPS although works it wont charge anymore.

Can I fix it? I opened it up, not sure were the fuse is?

[newtoCaps101]

Re: Blew Fuse on my GPS

Okay, So I opened it up andon the Battery Pack there is 3 identical wires, Red, Black and White (Sensor). So assuming some micro transistor or something got fried that disabled the charging mechanism, Could I splice the 3 wires in the battery pack and then connect them directly to the Red, Black & White wires coming of the active power source(cigarette lighter)?

Would that also charge the battery itself or will it blow up? Then do I need to cut off the battery pack entirely from the connector and then splice the wires to it?

[budm]

Re: Blew Fuse on my GPS

It will blow up, the Li-ion must be charged very carefully with real good charging current and voltage controller. Is the battery pack 3.6V?

[newtoCaps101]

Re: Blew Fuse on my GPS

Yea, its around 3.6V. so any other ides / fixes for it? anyway i can repair its recharging mechanism or should i cut off the battery from the connector and hardwire the wires to the car power adapter that takes 12v and converts to 3.6v output??

[kc8adu]

Re: Blew Fuse on my GPS

the cigarette cord likely provided +5 to run and current limited 4.2v to charge.
time to find what you let the smoke out of.

[newtoCaps101]

Re: Blew Fuse on my GPS

How? everything inside is miniature and solid state. So no caps. Do I have a chance at repairing this or should I cut off the cable connector coming out of the battery and connect the identical wires coming out of the cigarette cord?

[budm]

Re: Blew Fuse on my GPS

There are many caps inside the units. There is lore likely and IC for the Li-ON Charging circuits. Not likely that you will be able to repair the charging circuits.
MAXIM makes a lot of Li-on charging IC. You can learn more by Google LI-ION Charging. You can easily blow up the batteries and make nice big fire if you are not careful.