THill182 Posted February 3, 2018 Report Posted February 3, 2018 This is perhaps a minor issue but we (mechanic and I) now have been messing with it for over a week: The cable had detached for some reason from the cigarette lighter (the accessory 14V power source/receptacle) in my 2000 M20R, and then the loose cable hit the ground and shortened out the step-down adapter (28V>14V). Anyway, after putting it all together, the lighter still wouldn't produce any power. Next we looked for the step-down adapter and "found it" in the tail area. Turns out that it appears there is no fuse on the 14V side, and the short had fried the insides of it. My question now is: I have the opportunity to put a 5A (total) 2-USB-Port much simpler power plug into the place in the panel, instead of replacing the step-down adapter (the maker of that apparently has gone out of business). But I have a Garmin 695 that I have mounted to the yoke where I have my maps, weather, and so on. Can I use a USB-to-Cigarette-charger converter/adapter cable to drive my 695 while flying? I have been unable to figure out the power draw of that GPS while flying and while running it (with weather) on the highest brightness. Turns out neither the manuals nor the technical descriptions of the cigarette lighter charger for the 695 tells me anything about the power draw. I know the adapter for the USB-to-Cigarette adapter can put out 12V and 1A (since each USB output port puts out 5V and 2.1 A). Does anyone with "electrical expertise" have any insights here? Thanks! Quote
carusoam Posted February 3, 2018 Report Posted February 3, 2018 Got time to read...? They have a couple other manuals as well... https://support.garmin.com/support/manuals/manuals.htm?partNo=010-00667-42&language=en&country=US It is probably easier to put a fuse in that similar O1s are using. The O1 did not use a step down transformer. It has a non-switched (always live) 24v cigarette lighter socket... I'm a bit surprised there wasn’t an inline fuse to protect the guts of the transformer... it must have given its life to protect the wire supplying it. There must be a circuit breaker that the socket that the transformer was connected to...? Best regards, -a- Page number 223 electronic, 207 actual page, has some details regarding the electrical requirements for the 695.... I saw they recomend a 4amp fuse to protect the Garmin unit...? (This may be really helpful for your electrician/mechanic) Looks like you may need to download the manual to read it first... second link I put up... the first link seems to have only saved a nice pic. Quote
LANCECASPER Posted February 3, 2018 Report Posted February 3, 2018 You have a lot of options: By-pass the 28-14v stepdown. Your Garmin 695 will work from 10-32 volts. Most 28v Mooneys never had the stepdown and the cigarette lighter put out 28v. Hardwire your 695 - that also allows you to hook up to your panel GPS so that they will sync. http://www.aircraftspruce.com/catalog/avpages/garminpowerdatacable.php?clickkey=10060 Replace the stepdown (with my discount I can get it shipped to your door for $260.35) http://www.aircraftspruce.com/catalog/elpages/lonestar24to12.php?clickkey=253203 1 Quote
carusoam Posted February 3, 2018 Report Posted February 3, 2018 Got any panel space for one of those fancy temporary mounts? Makes the 695 temporary mount and is powered and turns on with your other avionics. Best regards, -a- Quote
THill182 Posted February 3, 2018 Author Report Posted February 3, 2018 Thanks for the info all; my mechanic located a serviceable replacement unit for <$100; in addition through his contacts he also got a great deal on an Appareo Stratus Power dual USB port (http://www.appareo.com/stratus-power/); so hopefully within a few days it's all back to normal again, plus I have a USB port that can charge my cell phone and my wife's Ipad during long flights (she likes to read, play games, watch movies). Still surprised that it's so hard to figure out what the draw is on that unit. Quote
carusoam Posted February 3, 2018 Report Posted February 3, 2018 Great follow-up, TH. i was expecting to find a spec page that would cover that important detail, volts and amps. But, the electronic format is hard to flip through... Index, reading, back to the index, read through the next section... The 695 is such a feature rich device, I would like to have one panel mounted... weather traffic approaches Less head turning compared to using in a knee board fashion. Best regards, -a- Quote
thinwing Posted February 6, 2018 Report Posted February 6, 2018 At 24 volts it takes a 1 amp breaker...I have mine hard wired using a panel mount Quote
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