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freestyler
Romania
43 Posts |
 Posted - 11 déc. 2009 : 10:32:15
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| Works fine while you set it to ethernet over usb, just plug the usb cable and it works |
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adrisoares
2 Posts |
Posted - 26 déc. 2009 : 00:46:31
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Problems with charging can arrise when installing new batteries bought on some sites. They can be good batteries, but not totaly compatible. I own a 710 Nuvi, and just bought a new battery online, because Garmin would charge me about 120Euros to replace it. I noticed that the original battery has 3 wires Black, Red and a Green one, while the recently bought battery has only the Red and the black. I Installed just connecting the power leads. It worked until the battery was drained. The on test screen, on battery showed NTC fault, and I realised that the green wire carried the information about temperature of Li-Ion battery while charging to avoid explosions. I carefully opened the original old Garmin battery and removed carefully the PCB with SMD where the battery leads and the three coloured wires are connected, and soldered it on the just bought battery, replacing the PCB also present there, taking very care to weld it to the correct polarity on the battery small plates. I first identified them with a voltemeter marking its leads sit a + in red and a - in black before I proceeded with the welding.
It is working fine.
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xcanuk
Canada
77 Posts |
Posted - 29 déc. 2009 : 02:08:46
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I might be new to this, but I don't understand the hassle. I regularly use my 755T with the usb plugged into either ac or dc. Once power is supplied, it goes into mass storage mode, then after 5 seconds, it loads maps and goes into navigation mode. (I'm using Garmin's usb cable)
If plugged into my laptop, it stays in mass storage until I disconnect.
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jotne
Norway
1685 Posts |
Posted - 29 déc. 2009 : 09:26:19
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Many would like to charge their GPS while still in map mode when connected to PC
This way we could look at map and plan trips, and still do not need an extra AC adapter. |
Previously owned : GPS "eTrex Yellow" "GPSmap 76S" "GPSMap 60CS" "GPSMAP 60CSx" "Nüvi 660"
Unit I have now :"Nüvi 760 EU" "Nüvi 765" "Edge 305" "Colorado 300" |
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adrisoares
2 Posts |
Posted - 29 déc. 2009 : 16:43:30
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| In a normal way, a unit (Nuvi 710) connected by USB to a computer goes into mass storage mode. If you disconect it, it reboots and goes into navigation mode. So if you connect it again to USB when the first characters appear after rebooting, it will stay in naviogation mode and charging. And all teh funsctions of navigations mode can be used. |
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dwhittall
Philippines
3 Posts |
Posted - 19 oct. 2011 : 19:13:27
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quote:
Originally posted by HRS
For what it's worth, I tried method #2 on my Nuvi 260. It does work, but immediately afterwards the battery would not charge even when connected to the Garmin car charger. (Until then, I'd *never* had any problem with the unit.)
I went into the diagnostic menu (hold down the area where the battery icon is located) and it showed an NTC battery fault, whatever that is. The only way I could restore normal charging was to CLR Checksums and run the full diagnostic routine. Then, the battery status was reset to normal and the unit did resume charging normally using the Garmin charger.
So, I'd advise some caution trying to "fool" the Nuvi 2xx series into working as a GPS when connected via a USB cable to a computer.
I discovered from a Google Search 'NTC' (Negative Temperature Coeffi cient) as well as this Thread!
Seems the Garmin Nuvi may have a 'thermistor temperature monitoring circuit, to make sure the battery does not overheat. If the voltage at that NTC input is above a given threshold, the NTC Fault is activated which kills the charging until if the Thermistor signals to the NTC input, the battery has cooled, ie voltage back down below the NTC Signal Threshold.
So I am wondering if your restore normal charging by "CLR Checksums and run the full diagnostic routine" did fix the problem or just take time, with no charging gong on, and the battery cooled down, and lowered the voltage to that NTC pin input, so the NTC Fault was removed and charging able to commence again?
Just leave it for 30 mins (or as long as the Full Diagnostic Routine takes to complete) and see if that NTC Fault clears on its own (as the battery cools down)?
Not saying this is the case but sound logical from a Datasheet on a Battery Charger Control Chip. This has an 'NTC' Negative Temperature Coefficient) Monitor pin that a Thermistor connects to.
I recently bought a 2000mAh Solar Charger (SPC-10) from CDR King for Php580. A set of 4 x Sanyo 'eneloop' batteries was that price. and would still need to buy a4 cell battery holder and Mini-'B' USB cable.
Specifications:
- Solar panel (poly-crystalline): 5.5V 100mA
- USB charging cable: 5V 500mA (current limited)
- Constant Voltage: 4.2V (to save internal battery power)
- Internal Li-ion battery: 3.7V, 2000mAh
- Output: 5.5V/500mAh
- Super long standby time: more than 3 months
- Charging by USB cable: The indication bar will turn blue incrementally until fully charged
- Charging in sunlight: One LED will turn red during charging
Protection: Charging current limited, discharging current limited, protection from overcharging, discharging, over current short circuit
When I ran my Garmin Nuvi from A Dual USB Adaptor in my 12V Power outlet on my Motorcycle, it occasionally came loose, with shock and/or vibrations on rough off-road sections.
Unlike running it off the Garmin 12V Adaptor, where you get 29 Seconds to push it home, or select 'Continue running off Battery), when using this the USB Adaptor and it disconnects from its 12V DC input, my Garmin Nuvi 255 went into USB connect Mode, the rebooted. This means loss of Navigation for more than 30 seconds, and loss of Track Log!
I think the Garmin must detect if it a Power Only USB connection or Power and Data (as you get on a PC.
The reasons for buying this being:-
i) Extend the the run time off Battery.
My Garmin Nuvi 255 (1250mAh Battery as standard)lasts about 3 hours.
ii)Maintain Power to Gamin 255 via USB cable from Battery Pack.
iii) Have a USB to Nokia N95 8GB Charging Cable (2mm Power jack) and /or Min 'B' USB (for charging my WBT-201 Bluetooth GPS Logger)
Getting a 100ma Solar Panel, and a Torch built in, were bonuses.
Whilst Testing with the Diagnostic Screen, to see if it was charging and what the voltages and charging current were, I got this
quote:
NTC battery fault
The Google Search also brought up this Thread!
I thought I would add what I found out about NTC, and why I was searching for what 'Battery NTC Fault',meant.
David
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Wintec G-Rays2 (WBT-201)
Nokia N95 8GB |
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Tip - Using your Nuvi while it is plugged into PC
