Something Weird with my 2639LMT

 

When the Unit was delivered from Amazon, the first thing I did was the Software and Map Update (2017.10). When I was Navigating with it, I was not getting the Junction View. I called Garmin and they said to re-install the Maps, so I did and bingo, got the Junction View.

FF to today, noticed I was not getting the Junction View after Installing 2017.20. I checked the jcv folder on the device and there were no jcv files in the folder so I re-installed the Map and I got the Junction View back. The 67LMs and 65LM were good to go.

Do I have a problem with the 2639 or does the unit just not like the 1st D/L...............

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2639LMT, 67LM (X2) and 65LM

reboot

After an update, reboot the GPS, not just sleep.

dobs108 smile

I did

completely shut the unit down by holding the Button till I get the prompt to turn off GPS. All the GPSs are turned off and not in sleep mode. Not unless I'm doing it wrong...................

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2639LMT, 67LM (X2) and 65LM

that's right

You did it correctly.

dobs108 smile

Make sure the PC stays on

Make sure the PC stays on throughout the map update process. If running Windows, go into Windows Control Panel/Power Options, and change the settings so the PC will never sleep, and change them back later. If running a Mac, I am sure there are similar settings.

I am running Windows 7 x64 fully updated, and Garmin Express is fully updated. There is a point in the map update process where Garmin Express reboots the GPS automatically. Several times, the reboot did not happen and had to be done manually.

Pay attention to the PC screen during the map update so you don't miss any messages about the SD card or choosing a smaller map. Use the original Garmin USB cable that came with the GPS and plug it into the PC directly without a hub. The rear of the motherboard should be the best USB port location.

POI Factory members using laptops on WiFi have had difficulty sometimes. Laptop batteries may run down during the map update.

If the problem comes back with future updates, do a reset, but back up the Saved Places first. Many times in these forums, a reset is recommended. The reason it is done is we have no idea what the problem is!

dobs108 smile

From another thread

This is from a discussion in another thread that may shed some light on why the map was installed without the Junction View file.

If you updated the map on the 67 and 65 first, and installed the map on the PC as well as the GPSs, Garmin Express has the capability to automatically run Garmin MapInstall to take the map from the PC and install it on the 2639 without the Junction View file, instead of downloading the complete map with all features from the Garmin site.

dobs108 smile

CraigW wrote:
Ed Y wrote:

Has anyone updated the new map to "computer only" using GE? This is the way I've done it for quite a while. Then use mapinstall to put new map on my 2 SD cards (I've got 2 Zumo 550's).

For the older GPS devices without Junction View, Voice Recognition, etc., this may be worth looking at.

But for the newer devices with these bonus features, the technique will place the map on the device but without these features and I expect most folks would be unhappy with the results.

Not quite correct

Note that Express doesn't 'automatically run MapInstall', it requires user input to do that.

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Where there's a will ... there's a way ... DriveSmart51LMT-S, DriveSmart50LMT-D, Nuvi 2508LMT-D, 1490LMT, 1310, Montana 650T, Etrex 20

yes

sussamb wrote:

Note that Express doesn't 'automatically run MapInstall', it requires user input to do that.

Yes, a button must be clicked to decide to use the map from the PC. MapInstall is then run from within Garmin Express. I have never actually used this feature.

Mapinstall

@dobs108 ... where do you see the option to run MapInstall from inside Garmin Express? I have seen it in BaseCamp (on the menu as "Install maps"), but am curious about where it is in Express?

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Alan - Android Auto, DriveLuxe 51LMT-S, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon

Me too ...

... smile

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Where there's a will ... there's a way ... DriveSmart51LMT-S, DriveSmart50LMT-D, Nuvi 2508LMT-D, 1490LMT, 1310, Montana 650T, Etrex 20

mapInstall

I cannot see any menu for it inside Garmin Express but my two nuvis already have the current map which is also on the PC, so no choices for installing the map exist.

Perhaps I was thinking of the automatic installation of Garmin MapInstall during a Garmin Express installation.

The important point brought out by Craig above is that MapInstall includes only the map and not accessory files like Junction View, and everybody with Garmin Express already has MapInstall ready for use.

dobs108 smile

confusion

Bit of confusion here. MapInstall is installed with BaseCamp and not Express.

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Where there's a will ... there's a way ... DriveSmart51LMT-S, DriveSmart50LMT-D, Nuvi 2508LMT-D, 1490LMT, 1310, Montana 650T, Etrex 20

MapInstall

The only area I have accessed Mapinstall is from Start Tab,Programs, Garmin and then MapInstall.

When using MapInstall per Garmin.The maps are installed just like Supplemental maps are.You lose Lane Assist and Junction View when using the MapInstall method.

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Charlie. Nuvi 265 WT and Nuvi 2597 LMT. MapFactor Navigator - Offline Maps & GPS.

interest in this thread

I am certainly glad to have created interest in this thread! What about the OP's question?

dobs108 redface

Yeah.

Yeah, I don't have an explanation for that either. Junction View should have been installed with the first running of the map update with Garmin Express ... should not require a reinstall to get Junction Views. I dunno ... just gremlins I guess, but I don't think it has anything to do with the Garmin MapInstall program, at least as I interpret Chief_10Beers original post.

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Alan - Android Auto, DriveLuxe 51LMT-S, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon

True

charlesd45 wrote:

The only area I have accessed Mapinstall is from Start Tab,Programs, Garmin and then MapInstall.

When using MapInstall per Garmin.The maps are installed just like Supplemental maps are.You lose Lane Assist and Junction View when using the MapInstall method.

Yep, you can get to MapInstall that way or through BaseCamp, but it has nothing to do with Express.

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Where there's a will ... there's a way ... DriveSmart51LMT-S, DriveSmart50LMT-D, Nuvi 2508LMT-D, 1490LMT, 1310, Montana 650T, Etrex 20

Ah Ha!

dobs108 wrote:

This is from a discussion in another thread that may shed some light on why the map was installed without the Junction View file.

If you updated the map on the 67 and 65 first, and installed the map on the PC as well as the GPSs, Garmin Express has the capability to automatically run Garmin MapInstall to take the map from the PC and install it on the 2639 without the Junction View file, instead of downloading the complete map with all features from the Garmin site.

dobs108 smile

CraigW wrote:
Ed Y wrote:

Has anyone updated the new map to "computer only" using GE? This is the way I've done it for quite a while. Then use mapinstall to put new map on my 2 SD cards (I've got 2 Zumo 550's).

For the older GPS devices without Junction View, Voice Recognition, etc., this may be worth looking at.

But for the newer devices with these bonus features, the technique will place the map on the device but without these features and I expect most folks would be unhappy with the results.

That's what I did, I updated one of the 67s first, then I D/L to Base Camp then I updated the 2639 then I updated the other 67 and 65. But I still don't know why the 2637 was the only unit that didn't install the Junction View the first time and the last two did.

Well all is well now. Next time I'll update the 2639 first and see what happens..................

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2639LMT, 67LM (X2) and 65LM

use garmin express

Chief, use Garmin Express to update each GPS. We do not know the sequence of events that caused the Junction View file to be left out.

It is remarkable that, after a failed partial map update, Garmin Express was able to repair the update by adding the Junction View file. This is a big improvement over the state of Garmin Express more than a year ago.

dobs108 smile

I've been using Garmin

I've been using Garmin Express since the get go. I'm an old hand with GPSs ( Aviation ) but a newbi with Auto GPS...........

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2639LMT, 67LM (X2) and 65LM

One more thing

The GPS must have good power during the map update process. Today's GPSs have hi-res screens and faster processors - meaning they use more electricity when running or updating.

If you start out with the battery partly depleted, a USB port may not be able to supply enough current to both run the update and charge the battery. Worst case, the update may not fully complete if the battery runs down.

When removing the unit from the car, the state of the battery is unknown. Charge it before the update with a cell phone charger that plugs into 120VAC (in UK, mains) and has a mini-USB connector. It should be rated at 5.0V and as much as 1000mA. Many of these are available rated at 500mA, but this is not enough. My Motorola charger supplies 850 mA.

dobs108 smile

Map vs software updates

dobs108 wrote:

The GPS must have good power during the map update process.

I'm not convinced a map update has this issue since the map is fully updated on the GPS (to my knowledge) while still connected to USB computer power.

I do fully agree that this is important when there's a software update since many software updates install after the GPS is disconnected from the computer and rebooted.

Since map updates sometimes come with software updates, dobs's suggestion is always the safest option.

Can others offer their ideas about the installation process and power needed for a map-only update? (I'd like to know if I'm wrong. redface )

I think ...

... you're correct. A map update simply places some new files on the nuvi while it's powered, so once they're on they're on. A software update as you say has to be disconnected and power cycled, if that fails ...

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Where there's a will ... there's a way ... DriveSmart51LMT-S, DriveSmart50LMT-D, Nuvi 2508LMT-D, 1490LMT, 1310, Montana 650T, Etrex 20

USB current is limited

You should not assume that once connected to a USB port, everything is all right and the GPS will be powered while writing the map update to internal memory even though the partially-discharged battery is taking a charge at the same time.

A USB port has a limited current-carrying capacity (ampacity). Voltage can be compared to the pressure available in a garden hose, while current can be viewed as the flow rate available in gallons per minute. If the current-carrying capacity is exceeded, the voltage will drop and the device will not be reliably powered.

A standard USB 2 port on a motherboard has a voltage of 5 volts DC and its ampacity is 500mA, or 1/2 an ampere. This is about half the ampacity of the wall charger mentioned above. If the ampacity rating is exceeded, the voltage will drop.

When a partially-discharged GPS battery is connected to a USB port, there will not be enough ampacity for both charging and running the processor for the map update. I have not made current measurements, but have you felt how warm the case of the GPS gets while updating? That is power being used - it comes out as heat.

This has always been a problem, but it has gotten bigger as screen size and resolution have increased, and maps have gotten larger. The battery would gradually discharge during the update. The update is very long - could be more than an hour. If the battery did not start out fully charged, the voltage could go low enough to prevent completion of the map update.

My conclusion is that the battery should be fully charged before starting the update. While updating, the GPS must necessarily be connected to a USB port.

This issue has been discussed in these forums previously.

Garmin recognizes the difference between USB and wall chargers -

https://support.garmin.com/support/searchSupport/case.faces?caseId={c34e3680-f9d7-11dc-4492-000000000000}

Facts about USB ports -

http://batteryuniversity.com/learn/article/charging_from_a_u...

Well ...

... I guess anything is possible but you're missing I think one point, that is that the 'map update' isn't taking place onto the GPS during the 'hour' you mention. Most of that time the files are being downloaded to your PC then compiled into the .img files that are eventually sent to the GPS.

Your GPS is simply sitting there during the first part of the process with its battery being charged and it's processor not being overly taxed, if at all.

I've also often done a map update without having a fully charged battery, although I do tend to ensure my GPS batteries always have a reasonable charge.

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Where there's a will ... there's a way ... DriveSmart51LMT-S, DriveSmart50LMT-D, Nuvi 2508LMT-D, 1490LMT, 1310, Montana 650T, Etrex 20

to nit-pick

dobs108 wrote:

A USB port has a limited current-carrying capacity (ampacity). Voltage can be compared to the pressure available in a garden hose, while current can be viewed as the flow rate available in gallons per minute. If the current-carrying capacity is exceeded, the voltage will drop and the device will not be reliably powered.

I don't know where you came up with "ampacity" but it isn't an electrical term. And to correct another error, the USB port isn't limited to 500 mA, it is what is called out in the specification but actually is a limitation of the PC and its power supply. I'm using an externally powered USB hub which will supply up to 3.5A to any or all of its 7 USB ports so, as long as I don't exceed the input limit I can plug in almost any load. I frequently plug in devices that pull a full amp through the plug.

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Illiterate? Write for free help.

USB hub not recommended

Much more ampacity is available from a hub, but Garmin recommends avoiding a USB hub for connecting the GPS to the PC for an update - the Garmin USB driver might not act properly.

I have been an electrician for 40 years! In my business, ampacity is all-important. An electrician who ignores ampacity will burn your building down! Thank goodness powering a GPS doesn't do this!

The ampacity of a USB 2 port on a motherboard is 500 mA. Check the fact link above.

https://en.wikipedia.org/wiki/Ampacity

dobs108 smile

Just did a map update

sussamb wrote:

...the 'map update' isn't taking place onto the GPS during the 'hour' you mention. Most of that time the files are being downloaded to your PC then compiled into the .img files that are eventually sent to the GPS.

Your GPS is simply sitting there during the first part of the process with its battery being charged and it's processor not being overly taxed, if at all.

I just did a map update for my 3597, which is a USB 2 device, and was plugged in to a USB 2 port on the PC. My internet connection is very fast. The map download to the PC was only about 20 minutes. Writing the map files to the nuvi took more than an hour.

dobs108 smile

Well ...

... 'Very fast' doesn't really tell us much. My download speed is 70Mbs and it takes longer to download etc the map files and around 10 to 15 minutes to send it to my nuvi. If yours takes an hour I'm surprised smile

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Where there's a will ... there's a way ... DriveSmart51LMT-S, DriveSmart50LMT-D, Nuvi 2508LMT-D, 1490LMT, 1310, Montana 650T, Etrex 20

just tested at 60 Mbps

My tested speed is 60 Mbps. I feel it is more important than the advertised speed. These speeds are so fast I think the limiting factor is the Garmin server.

dobs108 smile

Mine too

Tested at 70, a recent free upgrade from the 50 I used to get.

I've seen comments from Garmin at various times/places saying that their servers will send the data as fast as you can download it and that any restriction is placed there by the ISPs. I have no way of knowing if that's true smile

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Where there's a will ... there's a way ... DriveSmart51LMT-S, DriveSmart50LMT-D, Nuvi 2508LMT-D, 1490LMT, 1310, Montana 650T, Etrex 20

However

dobs108 wrote:

Check the fact link above.

https://en.wikipedia.org/wiki/Ampacity

dobs108 smile

"Ampacity is a portmanteau for ampere capacity defined by National Electrical Safety Codes, in some North American countries. Ampacity is defined as the maximum amount of electric current a conductor or device can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, ampacity is the the RMS electric current which a device or conductor can continuously carry while remaining within its temperature rating."

Now, your same source for USB https://en.wikipedia.org/wiki/USB#USB_2.0 under under power related specifications states the current carrying capabilities range from 1.5A for USB1.0 to 20V and 5A for USB3 in power delivery situations.

What this also shows, according to your reference Ampacity refers to the current carrying capacity of a conductor for "RMS electric current which a device or conductor can continuously carry while remaining within its temperature rating."

The point being is the USB specifications are written around DC voltages and current not AC voltage and current measured using the Root Mean Square or RMS averaging.

I will agree the protocol specifications for USB 2.0 state a USB connection shall supply 500 mA or 1/2 Ampere of current at 5VDC but that is unrelated to the current carrying capacity of the conductors or the connector. I believe the Wikipedia sidebar entry stating the electrical specifications are incorrect in stating the maximum current is 0.5A as standard specifications are stated as requiring a value such as 500 mA plus/minus a range as shown for the voltage. I know from my own work in developing ANSI standards for electronic devices values such as voltage and current were always specified providing both an upper and lower value around a required nominal value.

This comes down to ampacity being the wrong term to use when speaking of the supplied current from a USB port.

--
Illiterate? Write for free help.

Just to let you all know, My

Just to let you all know, My 2639 was fully charged both times. I use a Samsung Smart Phone Charger rated at 2.1 amps. I run simulations on my Garmins and the Phone Charger runs the units just fine, I never had a incapatible USB Cord or Charger issue except traffic which is expected when I run the simulations.

If the Garmins sit for about a week, I top charge the unit for about 3 hours.

I'll give ya'll a little background about me. I've been working in Electronics for about 37 years, got my Start building Heathkits and working with my Dad at the Local Commercial AM Radio Station. I worked at various Radio and TV Stations as a Broadcast Engineer.For the last 15 years I've been working as a Avionics ( Aviation Electronics ) Technician in Navigation, Communications, Auto Flight Computers and Gyro Systems ( AHRS ). Does that mean I know everything? No, not even close, that's why I'm here, learning from Ya'll. PNDs are very new to me, and the Bench Technician is a dying Breed LoL!
Well I wrote way too much, back to our regularly scheduled program................

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2639LMT, 67LM (X2) and 65LM