johnnychainsaw
Member Since: 24 Nov 2009
Location: West Sussex
Posts: 1222
  
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When the sound goes off its off constantly until I either turn air con on and within a few minutes it will come back on or I switch car off and leave for a while, then it will only come back on until it has warmed up then its off again. As I said earlier it will stay working so long as I keep it cool with air con on.
I guess the capacitor is in the head unit.
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 26th May 2012 6:43 pm |
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BBS SPY
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Member Since: 15 Jun 2007
Location: Sunny Cyprus
Posts: 3054
 
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Quote:Does sound a bit like a capacitor overheating/about to go
fade2grey. If LR had used cheap and crappy capcitors, as so many do, would you not imagine this to be a common problem in all D3's.
johnnychainsaw, It is true that large electrolytic capacitors of the type used in power supplies and audio amplification circuirtry can dry out, leak and even blow. and in latter stages their functionality can indeed seem dependant upon ambient temperature. They even have life expectancy ratings for them.
I am entirely familiar with this and have fixed more things than i could possibly remember, simply by replacing them.
The last case was in 2 identical wide screen monitors. having bought them new as a pair and used them as such, I am still however utterly stunned that both items exhibited exactly the same failings at exactly the same time.
Although no one else has ever reported the same problem, it is possible that one of the power supply capacitors in your head unit might possibly be at fault, noting that Audio amplification is actually done by the Amp under the seat which you have changed
But whadda i know 
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| 27th May 2012 6:46 pm |
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fade2grey
Member Since: 06 Sep 2008
Location: Reading
Posts: 304
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BBS SPY wrote:
fade2grey. If LR had used cheap and crappy capcitors, as so many do, would you not imagine this to be a common problem in all D3's.
I'm not suggesting that the problem this gentleman is experiencing is universal or wide spread or as a result of lr using substandard parts, merely suggesting that the symptoms seem to fit with the characteristics of a blown or faulty capacitor in the power supply, amp or logic of the head unit. I've seen plenty of complicated things brought to a halt by similar stuff.
If you happen to have the unit physically open, a quick visual scan of the caps should point out the suspect - its normally the one with the raised/domed end cap. It could be a host of other things, dodgy joints & connectors etc though. 56 HSE
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| 27th May 2012 7:50 pm |
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johnnychainsaw
Member Since: 24 Nov 2009
Location: West Sussex
Posts: 1222
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if it is the capacitor thats the problem could this be fixed?
The breakers yard that sent me the amp and kindly took it back said they have a head unit in all be it a single cd player (not 6cd). Will this just plug in and play or will I have to have it re programmed in?
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| 28th May 2012 8:50 am |
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BBS SPY
Site Sponsor
Member Since: 15 Jun 2007
Location: Sunny Cyprus
Posts: 3054
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The IHU that is strapped on the back of the Head unit does actually contain a 2200 UF 16V capacitor in it's power supply circuitry. This is on the output of a torroidal type choke and is of a size that could dry out and possibly cause temperature related failure symptoms.
It is however not something that can easily be visually checked and as is not something that is easy to get to or has any history of failure or reason to suspect.
If it was failing, you would loose everything including display and not just sound.
But wadda i know.
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| 29th May 2012 6:59 pm |
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geoff.
Member Since: 24 Jan 2010
Location: West kent
Posts: 8531
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johnny what you doing sunday 
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| 29th May 2012 7:20 pm |
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johnnychainsaw
Member Since: 24 Nov 2009
Location: West Sussex
Posts: 1222
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Hi Geoff not up to much on Sunday
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| 29th May 2012 10:11 pm |
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geoff.
Member Since: 24 Jan 2010
Location: West kent
Posts: 8531
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will speak to darrell tomorrow see if i can get him here sunday see if we can change over head units and find this problem
ps will leave a message for you tomorrow
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| 29th May 2012 10:17 pm |
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johnnychainsaw
Member Since: 24 Nov 2009
Location: West Sussex
Posts: 1222
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Ok cheers Geoff
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| 29th May 2012 10:32 pm |
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johnnychainsaw
Member Since: 24 Nov 2009
Location: West Sussex
Posts: 1222
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Argh, this is mental. Changed head unit over and I'm still having the same problem. Don't really know where to try next. 
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| 14th Jul 2012 3:18 pm |
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BBS SPY
Site Sponsor
Member Since: 15 Jun 2007
Location: Sunny Cyprus
Posts: 3054
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I did try to tell you that it wasn't your head unit chap
Here is a link to a video i made about the MOST bus based Land Rover Infotainment systems you might find interesting
[url]
&list=UUwsWXJr_piaJD9UKSVMXiIQ&index=1&feature=plcp[/url]
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| 14th Jul 2012 5:55 pm |
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MarkOne
Member Since: 23 Jul 2011
Location: County Antrim
Posts: 3345
  
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Good video you know your stuff love the Bluetooth app very clever.
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| 14th Jul 2012 6:27 pm |
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BBS SPY
Site Sponsor
Member Since: 15 Jun 2007
Location: Sunny Cyprus
Posts: 3054
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Cheers wired4smoke
yep, i certainly do know my stuff, especially in respect of LR infotainment systems and MOST BUS stuff.
It is really kinda my pet hobby.
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| 14th Jul 2012 7:42 pm |
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geoff.
Member Since: 24 Jan 2010
Location: West kent
Posts: 8531
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colin
where the best place to start looking to try to find out whats causing the problem 
ps as you very well know I've got quite a good piece of equipment to help me
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| 14th Jul 2012 7:44 pm |
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johnnychainsaw
Member Since: 24 Nov 2009
Location: West Sussex
Posts: 1222
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Hi BBS Spy,
Would you by any chance be able to explain why if it is the MOST system, when I keep the temperature low in car everything works fine but cuts out if I raise temperature. Could it be the cable distorts slightly when warm which might effect the circuit?
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| 14th Jul 2012 7:48 pm |
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