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| [ALERT] Garmin nuvi 765 (7x5) with MTK GPS - Updating and Dying - v3.60 Fix ! |
Posté le 24 juin 2009 à 15:00:00 par gpspassion. EN - General News
Source : Gpspassion
Updated June 24th- 3:00 PM PST
Garmin have just made the v3.60 software available via the WebUpdater to fix this "dead GPS" problem. This will only help those who can still power on their 7x5 GPS, others will have to send it in to Garmin with a quoted 15 day turnaround. As a side note some revived their unit by opening it following this YouTube video and disconnecting the battery for 30 seconds, but be advised that this is a risky operation that requires a Torx 5 screwdriver and voids the warranty.
Updated June 23rd, 2009 - Late last night we started getting reports in the forums that Garmin nuvi 765 systems were failing (and now 755s too). The scenario being : a pop-up saying a GPS update was being rolled out and then the nuvi powering off and refusing to power on again ! It is not known at this point what might be causing this, but the recent and temporary failure of the Omnitech GPS and acknowledgment by Rockwell Collins that there is a bug in some GPS receivers they built that would cause a date problem after June 20th 2009, could indicate that a scheduled fix for the 765's MTK GPS Chipset went wrong. Garmin are asking people to RMA their dead units so there is apparently no easy fix, but in case you own a 765 that hasn't gone bad, you can try renaming the GPS update files as this has spared SergZak's 765 it seems.
Updated October 29th, 2008 - Until 2005, Garmin GPS systems, be they handheld (eTrex, G60/G76), mixed (GPSV), car (SP2610, C320) or Marine (GPS276) used a "low sensitivity" Garmin chipset, with little correlation power. This meant long acquisition times, frequent loss of position in difficult environments and sometimes no operation at all. This all changed in mid-2005 when Garmin announced they would be using the high sensitivity SiRFstarIII chipset in their upcoming nüvi car system and then came the MTK and STMicro Teseo chipsets in mid-2007 and the STMicro Cartesio in 2008...
...However Garmin now only specify they use a "high sensitiviy" chipset, so it seemed interesting to attempt to sort through the GPS chipsets used on Garmin's current GPS sytems and you'll find the full results in this article on the portal.
Updated January 30th, 2008 - After several months of fine tuning, it seems Garmin and MTK have managed to fix the "odometer bug" in the latest v2.60 firmware release. Based on these new side by side comparisons between the Vista HCx and the SiRFstarIII based 60CSx in this thread of the "Handheld GPS" forums... ..., the distances reported are now consistent when the eTrex H used to significantly under report the travelled distance.
Updated October 3rd, 2007 - The new eTrex H family initially received enthusiastic reviews from new owners, thanks to its excellent sensitivity compared to the previous eTrex generation and to the long battery life, but then it appeared that the odometer "froze" in certain conditions resulting in erroneous distances being shown. Quite puzzling since the recorded track was accurate. Hope arose with the release of a v2.40 update, but the problem largely remains. To get a better understanding of this problem there are side by side comparisons between the Vista HCx and the SiRFstarIII based 60CSx in this thread of the "Handheld GPS" forums.
Updated July 18th, 2007 - The rumour had it that Garmin was switching from a SiRF to a MTK (Mediatek) chipset for the Nüvi 2x0 road systems but that proved to be wrong (at least originally as new units lack the SiRF logo as seen here) but there's "no smoke without a fire" as they say and MTK it is on the new eTrex H family of outdoor systems... ... Check out this report in the German Naviboard forums.
I have an order in for an eTrex HCx Vista and I'm looking forward to comparing it to the SiRFstarIII based 60CSx, particularly on a transtlanic flight, as the Magellan Explorist 600 with Truefix was no match. In the meantime, you can use this thread of the "News" forums to discuss.
Updated May 23rd, 2007 - Two years after Garmin added high sensitivity to the 60 and 76 GPSr families by switching from their own chipset design to the SiRFstarIII chipset (see a before/after), they are preparing a similar upgrade for the popular eTrex family. The new eTrex H series will duplicate the current range, Venture, Legend and Vista. No information on the chipset that will power them, SiRFstarIII, NemeriX 3, uBlox 5 or MTK...... ?
You can use this thread started by Jotne in the forums to discuss.
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Lu : 7010 | Suite de l'article... ( mots)
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