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Easy fix for compass !! EASY EASY!!

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jumpinjimmy
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PostPosted: Thu May 24, 2007 17:22    Post subject: Easy fix for compass !! EASY EASY!! Reply with quote

First thing, I have a 1991 2.5 turbo with a compass that gives a band of horizontal LCD compass readings with a LCD pointer underneath. There is also the temperature readout.  

I read a post on this site about changing the capacitors on the compass.  This seemed logical to me and as my compass was showing absolutely no signs of life, I had nothing to lose.  

I opened up the compass (the capacitors are black upright cylinders and have their values marked on the sides, such as 10volts and 4.5 microfarads, you might need a magnifying glass for this).  

I only replaced 5 capacitors, wanting to do as little as possible to make this thing work and reduce the risk of messing it up as I'm not an electrician.  

I looked for the ones that appeared to have been leaking, ie. brown goo coming from them.  

When removing the capacitors, it helps to put pressure on the cap so that when you heat the solder, it is easy to pull out.  I heated the back side of the board and pulled a little on the cap with my fingers.  It's important to note that capacitors have a positive and negative side and need to be re-installed in exactly the same polarity. The negative side has a grey stripe and is marked with the negative symbol. Also note worthy is that you can use a cap with a higher voltage than what is marked on the original just in case the supplier doesn't have exactly the same value.  However, the microfarad value is important and must be exact but these things are plentiful and you shouldn't have any problems.  

I needed to replace capacitors on two of the circuit boards, contrary to the post I read which emphasized that only the middle circuit board needed caps changing.  

It took me about half an hour and I purchased the parts from ESR electric components in Tyne & Wear ( 0191 251 4363) costing only £1.59.  The circuit boards are pretty sturdy and even with my lousy soldering, it started up right away.....I drove around in circles twice to reset the readings and voila!!  

Feel free to contact me if you have questions about repairing yours.  It's easy!  

PS.  I love this site....It is so useful.  Very Happy
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PostPosted: Thu May 24, 2007 17:22    Post subject: Google Ads keep the POCUK free to join!


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jumpinjimmy
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PostPosted: Fri May 25, 2007 5:00    Post subject: Reply with quote

ESR Electronics also has a website at www.esr.co.uk   for all kinds of electronics stuff.  Better stocked than Maplins and very friendly on the phone.
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PoCUK
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PostPosted: Fri May 25, 2007 6:02    Post subject: Reply with quote

Great post Steve!  Very informative and could (should) help to save a few pounds for those with the same problem!

Thank you!

Simon Wink
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Knight
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PostPosted: Mon Jun 04, 2007 14:30    Post subject: Reply with quote

Perfect thanks a millions Very Happy
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robcad1972
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PostPosted: Tue Apr 08, 2008 22:53    Post subject: Reply with quote

Great Post, mine are being changed by a local guy who fixes radio's etc. But here's an idea for those who can't be fussed with having a compass take it out and put a photo in it's place, i have done this so i am not looking at an empty space where the compass was while i wait to get it back from the shop. Laughing
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JoynerJonny
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PostPosted: Thu Aug 27, 2009 7:49    Post subject: Compass Reply with quote

Right ho mine is the same on the Paj I have just picked up. Seems a common fault?

Mine is showing temperature ok (and a little car symbol Question ) and the compass bit is just flashing at me on the LCD display. Light bulb has also gone.

Is the above likely to do the job then if I follow the guidelines?

Thanks.  Smile
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Si7
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PostPosted: Sun Aug 30, 2009 22:36    Post subject: Reply with quote

The flashing sounds like your compass has simply lost power at sometime, try this :

http://www.pocuk.com/faq/resetcompass.htm

Won't fix the bulb of course Wink
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montero2
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PostPosted: Sun Aug 30, 2009 23:18    Post subject: Reply with quote

does he mean the north south sections flashing alternate, if so just reset the compass??
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mr meener
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PostPosted: Tue Sep 08, 2009 21:25    Post subject: Reply with quote

cheers 4 that im gonna have a bash @ that this week ....nice 1
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minesapasty
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PostPosted: Tue Sep 08, 2009 22:08    Post subject: Reply with quote

I have repaired a few of these now........... somethings that you really need to take into consideration, before you try this. You may be lucky and get away with it, but if you aren't, you will be needing to buy a new compass.

1. Make sure that the soldering iron that you are going to use is not too high wattage, or you will damage the print (the print is glued and the glue will melt with heat) and the circuit board will then be useless.

2. Use a de-soldering tool or braid to remove the solder. The heat and pull method is very likely to damage the print. (that's the luck part).

3. Due to the way that these boards have been manufactured, the legs of the capacitors have been folded over, to hold the components in place during the soldering process. Because of the legs being folded, it is harder to de-solder and then remove them, so making it necessary to keep the soldering iron on the joints for a longer period of time...... making it more likely that you will damage the circuit board.
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sharpy1980
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PostPosted: Sun Jan 17, 2010 22:10    Post subject: Reply with quote

My compass has been blank since buying my paj in July and after seeing this thread I decided to have a crack at fixing it... I took mine apart and it needed 10 changing between 2 of the boards, as I couldn't find a local supplier for the parts and as I work at a recycling centre I smashed open a couple of tellys and the circuit boards had everything I needed and it now works which is surprising considering the hash I made of the soldering Very Happy  Just got to get a bulb now.

If it helps I've listed the ones I needed which was most of them so peeps can try and source them before they start 6x 50v-1mf, 1x 10v-47mf, 1x 50v- 4.7mf 1x 10v-100mf, 1x 50v-10mf

cheers guys
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REVOGEL
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PostPosted: Mon Jan 18, 2010 10:28    Post subject: Reply with quote

If it possible to get to them [Especially if folded as stated] cut them off and push the wire end through with the hot soldering iron.
By the way the hotter the iron the better Confused  It is the extended time taken to melt the solder that causes the printed cct to lift. Wink
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sharpy1980
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PostPosted: Tue Jan 19, 2010 21:29    Post subject: Reply with quote

Just a quick update, yesterday I went to Mitzi armed with the part no. for a new bulb for the compass @ £3.00, it had to be ordered in but arrived today and was identical in everyway to the old one... it even didn't work like the old one Sad I was thinking there must be a prob with the circuit so I took it back apart and got the multimeter in there... all ok so I decided to solder in a blue led with a resistor and it works a treat, looks wicked and the led should last alot longer than a bulb. I only ask myself why I didn't think of it while I had it apart doing the capacitors and saved myself £3.
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NYRA
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PostPosted: Wed Feb 24, 2010 14:20    Post subject: Reply with quote

sharpy1980 wrote:
Just a quick update, yesterday I went to Mitzi armed with the part no. for a new bulb for the compass @ £3.00, it had to be ordered in but arrived today and was identical in everyway to the old one... it even didn't work like the old one Sad I was thinking there must be a prob with the circuit so I took it back apart and got the multimeter in there... all ok so I decided to solder in a blue led with a resistor and it works a treat, looks wicked and the led should last alot longer than a bulb. I only ask myself why I

didn't think of it while I had it apart doing the capacitors and saved myself £3.
pics of it please  then love lights me them same bulds  a pound were i live mate
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GiselaFortney
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PostPosted: Tue Oct 26, 2010 11:49    Post subject: Reply with quote

Montero how do you reset a compass?
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