Losing Time

[whitedragon551 5,000+ posts]

Just out of curiosity what would cause a modern HU to lose time? Battery and alternator are fine. Wiring behind the HU is fine. Over a month it will lose like 3 minutes. Over 2 months it loses almost 9 minutes and stops losing time.

I know back in the day they used to basically have a CMOS battery in them that would keep time.

Any ideas?

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[Falcons 5,000+ posts]

Depends, did you get it in a giveaway? //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[Kangaroux 5,000+ posts]

Headunits definently don't use a CMOS. The point of the CMOS is to store data when the unit receives no power. Unplug the harness from your headunit and poof all your data is erased. Since the headunit receives constant power it's most likely stored in a less temporary RAM memory. Since its not the memory that's causing it, something with the actual processing is fvcked

 

[SSS 18734 5,000+ posts]

It's not synced wirelessly like your phone is. Pretty much all clocks that aren't will drift a bit, at varying rates.

My eclipse is a bit fast. Over the course of a year it's usually about 5 minutes ahead of what my phone says.

 

[06goat 10+ year member]

Headunits definently don't use a CMOS. The point of the CMOS is to store data when the unit receives no power. Unplug the harness from your headunit and poof all your data is erased. Since the headunit receives constant power it's most likely stored in a less temporary RAM memory. Since its not the memory that's causing it, something with the actual processing is fvcked

Not necessarily, my 800PRS was unplugged, shipped to me, and it still had all of his processing stored.

 

[Kangaroux 5,000+ posts]

Not necessarily, my 800PRS was unplugged, shipped to me, and it still had all of his processing stored.

Then that's a feature they added into the 880, which I'm not surprised since it's a high end unit

 

[chillin 10+ year member]

Not necessarily, my 800PRS was unplugged, shipped to me, and it still had all of his processing stored.

but what time was it? My 880 kept my eq settings, but im pretty sure the clock would reset.

 

[bubbagumper6 5,000+ posts]

You're headunit can time travel...

*duh*

 

[Shinju 10+ year member]

Then that's a feature they added into the 880, which I'm not surprised since it's a high end unit

Alpine CDA decks can store data even after they have been unplugged. Now if they sit for a long period of time they will go back to default settings, how long I do not know.