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The Amazing Disappearing Clock

Posted: Fri Jul 17, 2009 8:08 am
by WRXWagon2112
So lately I've noticed that my LED clock does not always light up when the car is running. Sometimes this happens upon start-up but corrects itself after a few minutes. Sometimes the clock lights up when I start the car but will go out some time later. Only to come back on again.

The time that's displayed is still correct, it's just the visibility that's affected.

Has anyone heard of this happening? Any thoughts as to what would be causing it? Perhaps a bad fuse? Wouldn't a faulty wiring connection also affect the time that's displayed?

--Alan

Re: The Amazing Disappearing Clock

Posted: Fri Jul 17, 2009 8:19 am
by ElZorro
Might be a flaky connection / bad component in the drive circuitry for the display segments... if that was the case you'd pretty much have to just replace it.

Re: The Amazing Disappearing Clock

Posted: Fri Jul 17, 2009 8:29 am
by WRXWagon2112
Just did a search on NASIOC and found that this is a common problem. Apparently, one particular component is prone to a bad soldering connection. Here are some threads:

http://forums.nasioc.com/forums/showthr ... ?t=1661050
http://forums.nasioc.com/forums/showthr ... ?t=1245003
http://forums.nasioc.com/forums/archive ... 57450.html

Here's the jist of it:
Mod MULDER wrote:There have been reports of bad solder connections on the circuit board inside the clock. If you know how, pull the clock and take it apart, and repair any bad connections. If you don't know how, get someone who does to take a look at it, or check the classifieds for a used clock. They are often for sale reasonably cheap.
Looks like I get to learn how to solder! :D

--Alan

Re: The Amazing Disappearing Clock

Posted: Fri Jul 17, 2009 9:17 am
by goob_os101

Re: The Amazing Disappearing Clock

Posted: Fri Jul 17, 2009 1:32 pm
by zaxrex
Mine stopped working about a month ago. Still powers my gauges, so no biggie. There are plenty of other things to gain my attention over that right now though.

Re: The Amazing Disappearing Clock

Posted: Fri Jul 17, 2009 1:36 pm
by WRXWagon2112
For those who don't want to click through and do the reading ... here's the supposed fix (since I haven't actually done, I can't vouch for it personally)

1) Take the clock out
2) Locate the resistor labeled "510" (this is the likely culprit with weak soldering)
3) Carefully solder this part
4) Re-assemble

Here's another user's explanation:
NASIOC user MConte05 wrote:The clock pod does just pop out. I used a flathead screwdriver to pry it out. Takes some amount of force. Then pop the clock itself out of the pod, once again, another small flathead and some force will eventually get it out (I had a bitch of a time with mine). Then simply disassemble the clock by removing the back (more clips) and pop the board out (guess what? more clips).

I first tried just adding some solder to it, but since it is a surface resistor it needs solder on the bottom. I would suggest just heating up the connections to the resistor itself until slides away and can be easily removed. Then add a bit of solder to the connection points on the board, and a little on the resistor itself. At that point just lay the resistor back on the board, then heat up both ends untill the solder melts and joins the two together, do that for both ends.

You don't need to reassemble the entire clock either to test it. Just take the board and plug it it (make sure you have the plug going in the right way and not upside down) and turn on the power to the car, might take a second or two until it powers up (did for me at least). If it works, awesome! If not... try it again, it took me two or three tries before it finally worked. I figured my clock was busted for good until I decided to give it another shot, and bam, worked.

I am sure someone can write up better instructions, or at least tell me if my method was completely whack. I am not an electronics guru, so I don't solder *too* much.
Now let's see if I make this fix sooner than I did the 'seat belt mod'.

--Alan

Re: The Amazing Disappearing Clock

Posted: Fri Jul 17, 2009 1:59 pm
by ElZorro
Easy nuff. I have a soldering iron that is hot enough to do the job but cool enough to run off an inverter, we could do it in the parking lot of a meet. Especially if you can pop it out before hand.

This is what they call a target rich environment -

Posted: Fri Jul 17, 2009 3:22 pm
by zaxrex
ElZorro wrote:we could do it in the parking lot of a meet. Especially if you can pop it out before hand.
Cuz when you are meeting a guy in a parking lot for a quickie, popping it out before hand saves so much time....
:banana2: :banana2: :banana2: :banana2: :banana2: :banana2: :banana2: :banana2: :banana2: :banana2: :banana2: :banana2: :banana2: :banana2:
:on2me: :rolllaugh: :lol2:

EPIC SELF FAIL

Re: The Amazing Disappearing Clock

Posted: Fri Jul 17, 2009 3:55 pm
by ElZorro
Pervert.








:lol:

Re: The Amazing Disappearing Clock

Posted: Fri Jul 17, 2009 5:31 pm
by Mr Kleen
:lol2:

Re: The Amazing Disappearing Clock

Posted: Fri Jul 17, 2009 7:05 pm
by Sabre
:rolllaugh: :rolllaugh:
If Jason can't help you, I can... big boy ;)

Re: The Amazing Disappearing Clock

Posted: Fri Feb 26, 2010 7:15 am
by WRXWagon2112
Finally got around to doing this fix. They weren't kidding - it's a small component and one end of it is tough to get at. But it looks like it worked. The clock came on when I started the car and stayed on. W00t!!1!

--Alan

Re: The Amazing Disappearing Clock

Posted: Fri Feb 26, 2010 7:46 am
by sirwilliam
Awesome! Very satisfying to not only get something fixed that has been bugging the crap out of you but to do it yourself. :D

Re: The Amazing Disappearing Clock

Posted: Fri Feb 26, 2010 7:53 am
by zaxrex
Mine is still blank. But then I have not done the above fix, so I guess I should not be surprised that it is still off.
Good for you Mr. Dad.