EEVblog #1281 - Garmin GPS Repair - Page 1
Forum section: electronics / general

author: EEVblog
author_rank: Unknown
timestamp: January 26, 2020, 10:59:43 pm
content: Repair of a Garmin GPS unit, with characteristic Dave screw-up and Murphy.https://www.eevblog.tv

author: johnlsenchak
author_rank: Frequent Contributor
timestamp: January 27, 2020, 12:40:45 am
content: I wouldn't have fixed something like that, in my opinion it's just not worth it. I would have just thrown it in the recycle bin and bought a new one with updated firmware Problem solved !

author: tocsa120ls
author_rank: Regular Contributor
timestamp: January 27, 2020, 06:13:12 am
content: Good on yaI have a handful of those mini-USB cables cut up in my spares box, the ones you buy nowadays are built down to a price (sub-$1) and are absolutely atrocious.I fixed a similar GPS last month for a friend, his cable frayed and was making intermittent contact, of course this drained the battery, eventually killing it. Replaced the battery and cable, new cable was crap. Replaced the cable, turns out his car charger died as well. (lifted positive trace)I politely asked him not to bring me anything more complicated than a rock to fix next time.

author: thm_w
author_rank: Super Contributor
timestamp: January 27, 2020, 09:15:30 pm
content: Quote from: johnlsenchak on January 27, 2020, 12:40:45 am- Reduces waste- Saves money- Makes an interesting youtube video- Some of these units have lifetime map upgrades

author: johnlsenchak
author_rank: Frequent Contributor
timestamp: January 27, 2020, 09:30:31 pm
content: Quote from: thm_w on January 27, 2020, 09:15:30 pm- Reduces waste( agree)- Saves money( Not real when the stuff is made China and sold abroad on the ultra cheap)- Makes an interesting youtube video( Not real when most of the components are surface mount)- Some of these units have lifetime map upgrades( You can just use the maps on your cell phone)

author: JustMeHere
author_rank: Frequent Contributor
timestamp: January 27, 2020, 10:32:28 pm
content: I've seen this statement before in data sheets too. I thought the device side should not connect the shield pins to GND."Shield should only be connected to Ground at the host. No device should connect Shield to Ground."http://www.hardwarebook.info/Universal_Serial_Bus_%28USB%29

author: SilverSolder
author_rank: Super Contributor
timestamp: January 27, 2020, 11:15:17 pm
content: Quote from: johnlsenchak on January 27, 2020, 09:30:31 pmUsing a cell phone for navigation can be a bit annoying at times. Apart from reception issues causing problems occasionally, phones tend to drain their batteries faster than a dedicated GPS.

author: richnormand
author_rank: Unknown
timestamp: January 27, 2020, 11:34:35 pm
content: At one point Dave mentioned in the video that he is using lead-free solder (unless I misunderstood).For that type of repair (hobby, non commercial) I use leaded solder since I can use a lower temperature, less toxic flux, better wetting, better joint appearance and less susceptible to cracks and adhesion issues when stressed in a connector here.Any reason to use unleaded for this repair that I am missing?Edit: Any reason to use "un"leaded...... thanks thm_w

author: thm_w
author_rank: Super Contributor
timestamp: January 28, 2020, 12:28:47 am
content: Quote from: JustMeHere on January 27, 2020, 10:32:28 pmNot sure where they get that info from, I would trust Intel over them:https://www.ti.com/sc/docs/apps/msp/intrface/usb/emitest.pdf"Tie shell to ground plane"There are so many discussions of this already,https://www.eevblog.com/forum/projects/usb-shield-ground-connection/Quote from: richnormand on January 27, 2020, 11:34:35 pmYep flux is more toxic and has more fumes, as you are dealing with higher soldering temperatures.One possible motivation, Dave has young children so if they have a lot of lead exposure and do not wash their hands that could be an issue.

author: EEVblog
author_rank: Unknown
timestamp: January 29, 2020, 10:03:47 am
content: Quote from: thm_w on January 28, 2020, 12:28:47 amMrs EEVblog has banned the kids from using leaded solder

author: SilverSolder
author_rank: Super Contributor
timestamp: January 29, 2020, 03:59:59 pm
content: I remember playing with liquid mercury with my bare hands, in science class (probably grade 5 or 6)... Explains a lot!!!