After the flurry of mail on the NO CONT problem I put my 1995 stock radio
on the workbench again in order to have a good look at the handshake signal
path.
I used the original Jaguar and the Alpine 5920 with the adaptor.
The 5920 has no audio feed through the 8-pin DIN connection cable. It has a
separate audio cable with two RCA connectors for plugging straight into an
amplifier.
The adaptor combines these audio connections and feeds them through the 8-pin
cable.
The handshake/control signal comes to the top of the left hind corner and
connects to a smd condenser. It is a pulse width square wave signal.
At first I got a cd playing for about 15 seconds and the NO CONT showed.
No more playing of the CD.
After following the signal on the oscilloscope, which is not easy as the
signal stops when
no communication occurs, the CD started playing again.
And kept playing!
Pretty confident that a bad solder must be the cause I re-soldered the smd
components
I found in the handshake circuit.
That was two days ago and the stock radio still plays CD’s on both changers.
However, these two days will not guarantee that the problem is solved for good.
I will keep you posted on the behavior of the radio,
Jos Raven>Chris,
I agree with you on this.
I have three CD changers, two Alpine and a real Jaguar.
The Alpines are;
5952 with the 4913 adaptor
5960
The Jaguar is # DBC5130 and comes from my old, 1992, XJ40.
The 5960 was in the X300 when I bought it and worked well until
the NOT CONT message kept creeping up.
Cleaning the CD changer and its laser lens did not help.
I gave up on the stock radio.
I have an older Alpine radio now with a facia adaptor.
I’ll remove my head-unit tonight and have a look at these components as
well. I need to renew the LCD back-light bulb anyway as I recently
replaced it with a bulb that was far too dim.
Chris C
Jos Raven wrote:>
After the flurry of mail on the NO CONT problem I put my 1995 stock radio
on the workbench again in order to have a good look at the handshake
signal path.
I used the original Jaguar and the Alpine 5920 with the adaptor.
The 5920 has no audio feed through the 8-pin DIN connection cable. It has a
separate audio cable with two RCA connectors for plugging straight into
an amplifier.
The adaptor combines these audio connections and feeds them through the
8-pin
cable.
The handshake/control signal comes to the top of the left hind corner
and connects to a smd condenser. It is a pulse width square wave signal.
At first I got a cd playing for about 15 seconds and the NO CONT showed.
No more playing of the CD.
After following the signal on the oscilloscope, which is not easy as the
signal stops when
no communication occurs, the CD started playing again.
And kept playing!
Pretty confident that a bad solder must be the cause I re-soldered the
smd components
I found in the handshake circuit.
That was two days ago and the stock radio still plays CD’s on both
changers.
However, these two days will not guarantee that the problem is solved
for good.
I will keep you posted on the behavior of the radio,
Jos Raven
Chris,
I agree with you on this.
I have three CD changers, two Alpine and a real Jaguar.
The Alpines are;
5952 with the 4913 adaptor
5960
The Jaguar is # DBC5130 and comes from my old, 1992, XJ40.
The 5960 was in the X300 when I bought it and worked well until
the NOT CONT message kept creeping up.
Cleaning the CD changer and its laser lens did not help.
I gave up on the stock radio.
I have an older Alpine radio now with a facia adaptor.
I refreshed the solder joints on all the SMD components you mentioned
and … hey presto … it works! Only checked it twice, once when I
reinstalled the head unit and this morning on the way to work. No more
'NOT CONT’s - before, my head-unit ALWAYS generated a ‘NOT CONT’ a few
seconds after switching on.
I suspect it must be one or more of the SMD components right next to
that tall black heatsink - over the years lots of hot-cold cycles to
weaken the solder joint(s).
Chris C
Chris Copplestone wrote:> Jos,
I’ll remove my head-unit tonight and have a look at these components as
well. I need to renew the LCD back-light bulb anyway as I recently
replaced it with a bulb that was far too dim.
Chris C
Jos Raven wrote:
After the flurry of mail on the NO CONT problem I put my 1995 stock radio
on the workbench again in order to have a good look at the handshake
signal path.
I used the original Jaguar and the Alpine 5920 with the adaptor.
The 5920 has no audio feed through the 8-pin DIN connection cable. It
has a
separate audio cable with two RCA connectors for plugging straight
into an amplifier.
The adaptor combines these audio connections and feeds them through
the 8-pin
cable.
The handshake/control signal comes to the top of the left hind corner
and connects to a smd condenser. It is a pulse width square wave signal.
At first I got a cd playing for about 15 seconds and the NO CONT showed.
No more playing of the CD.
After following the signal on the oscilloscope, which is not easy as
the signal stops when
no communication occurs, the CD started playing again.
And kept playing!
Pretty confident that a bad solder must be the cause I re-soldered the
smd components
I found in the handshake circuit.
That was two days ago and the stock radio still plays CD’s on both
changers.
However, these two days will not guarantee that the problem is solved
for good.
I will keep you posted on the behavior of the radio,
Jos Raven
Chris,
I agree with you on this.
I have three CD changers, two Alpine and a real Jaguar.
The Alpines are;
5952 with the 4913 adaptor
5960
The Jaguar is # DBC5130 and comes from my old, 1992, XJ40.
The 5960 was in the X300 when I bought it and worked well until
the NOT CONT message kept creeping up.
Cleaning the CD changer and its laser lens did not help.
I gave up on the stock radio.
I have an older Alpine radio now with a facia adaptor.
Chris,
there is definitely one smd resistor that I found not to be soldered on one
side.
This morning I placed the cassette hardware back in the radio and the NOT CONT
appeared again. I removed the cassette player again and CD playback came
back again.
After some prodding with a plastic trim tool I could locate the region
around the left rear corner again. Soldering some more smd components
brought a surprise!!
A resistor moved while soldering one side, this should not be possible if
both sides
are solder firmly. I took the resistor off and indeed, no solder on the
other pad. None at all!!
Picture is here; http://tinyurl.com/8g5t8
It is the resistor just on the right corner of the heat sink, marked 223
(22kOhm). The lower pad was not soldered. A square wave signal (part of the
handshake) is carried here.
I hope that this is the end of the problem now.
I’ll keep you all posted.
Jos Raven
1995 X300
Holland.
At 11:06 1-8-2005 +0200, you wrote:>Jos - well done!
I refreshed the solder joints on all the SMD components you mentioned and
… hey presto … it works! Only checked it twice, once when I reinstalled
the head unit and this morning on the way to work. No more 'NOT CONT’s -
before, my head-unit ALWAYS generated a ‘NOT CONT’ a few seconds after
switching on.
I suspect it must be one or more of the SMD components right next to that
tall black heatsink - over the years lots of hot-cold cycles to weaken the
solder joint(s).
in your picture, I had resoldered all the SMD components in the first
row above the heatsink, plus a few more to its right. Although I used a
head-mounted magnifying glass (an ‘optivisor’), I never noticed the lack
of solder at any joint, but then I wasn’t looking for that aspect!
Now, as you may well know, it’s perfectly feasible that this solder
joint is missing in all the radios built as the application of the
solder paste and the SMD components is all done by a pre-programmed
machine. Perfectly possible that this particular solder pad never
received any solder paste - not something I would expect from the
Japanese quality control however!
Chris C
Jos Raven wrote:>
Chris,
there is definitely one smd resistor that I found not to be soldered on
one side.
This morning I placed the cassette hardware back in the radio and the
NOT CONT
appeared again. I removed the cassette player again and CD playback came
back again.
After some prodding with a plastic trim tool I could locate the region
around the left rear corner again. Soldering some more smd components
brought a surprise!!
A resistor moved while soldering one side, this should not be possible
if both sides
are solder firmly. I took the resistor off and indeed, no solder on the
other pad. None at all!!
Picture is here; http://tinyurl.com/8g5t8
It is the resistor just on the right corner of the heat sink, marked 223
(22kOhm). The lower pad was not soldered. A square wave signal (part of
the handshake) is carried here.
I hope that this is the end of the problem now.
I’ll keep you all posted.
Jos Raven
1995 X300
Holland.
At 11:06 1-8-2005 +0200, you wrote:
Jos - well done!
I refreshed the solder joints on all the SMD components you mentioned
and … hey presto … it works! Only checked it twice, once when I
reinstalled the head unit and this morning on the way to work. No more
'NOT CONT’s - before, my head-unit ALWAYS generated a ‘NOT CONT’ a few
seconds after switching on.
I suspect it must be one or more of the SMD components right next to
that tall black heatsink - over the years lots of hot-cold cycles to
weaken the solder joint(s).
Chris,
That is exactly what I did after locating where the control signal originated.
However, after the fault reappeared I did some prodding and resoldering.
This is how I found a complete " dry solder ", the resistor just moved when
I touched
the upper pad with the soldering tool.
If that is the only one then it could well explain that one radio after the
other gets
the " disease " .
I hope that this is the fault as it would help a lot of X300 lovers in
getting the radio
back to work.
I must try and make a better picture (I’ll do it right away).
People could take that picture to a repair shop and point the components out
for soldering.
I would like to help, but sending a radio across the ocean and back is a
bit costly
I suppose.
Jos
At 13:22 1-8-2005 +0200, you wrote:>Jos,
in your picture, I had resoldered all the SMD components in the first row
above the heatsink, plus a few more to its right. Although I used a
head-mounted magnifying glass (an ‘optivisor’), I never noticed the lack
of solder at any joint, but then I wasn’t looking for that aspect!
Now, as you may well know, it’s perfectly feasible that this solder joint
is missing in all the radios built as the application of the solder paste
and the SMD components is all done by a pre-programmed machine. Perfectly
possible that this particular solder pad never received any solder paste -
not something I would expect from the Japanese quality control however!
This is very interesting and potentially very useful. Just one
question…what is (a/an) SMD? I don’t know what to look for or where to
look. Pictures would be nice if you have a way to do that, Also, if this
seems to be THE FIX on these things for this seemingly common occurrence, a
write-up would be even nicer with steps and pictures. Us
non-electrical-types might just be able to perform this procedure then.
Best, Brian
I refreshed the solder joints on all the SMD components you mentioned
and … hey presto … it works! Only checked it twice, once when I
reinstalled the head unit and this morning on the way to work. No more
'NOT CONT’s - before, my head-unit ALWAYS generated a ‘NOT CONT’ a few
seconds after switching on.
I suspect it must be one or more of the SMD components right next to
that tall black heatsink - over the years lots of hot-cold cycles to
weaken the solder joint(s).
Brian,
a SMD is a Surface Mounted Device, that is a resistor, condenser, transistor
or any modern miniature electronic component soldered directly on the surface
of a Printed Circuit board (PCB), without pins in holes through the board.
All the other components in that region are all in the control/handshake
circuit.
If this is THE final solution is too soon to say, but my Stock Radio works
fine now.
If this is a common fault made by the soldering machine programmer, quit a
mouth
full, then all radios from a production batch could have that fault.
A bad contact that sooner or later will fail.
I’ll keep you posted about the developments.
Jos Raven
At 09:54 1-8-2005 -0500, you wrote:>This is very interesting and potentially very useful. Just one
question…what is (a/an) SMD? I don’t know what to look for or where to
look. Pictures would be nice if you have a way to do that, Also, if this
seems to be THE FIX on these things for this seemingly common occurrence, a
write-up would be even nicer with steps and pictures. Us
non-electrical-types might just be able to perform this procedure then.
Folks, obviously, I am behind the info curve. And the questions seem to have
been answered. As Roseanne Roseanna Danna had to finally say - “Never Mind”.
Right actress, right show, wrong character. Actually it was Emily Litella.
;-p
“Mark 1” Mark Stephenson
'52 XK120 S673129, '59 Mk1, '84,'85,'86 &'95 XJ6-----Original Message-----
From: owner-x300@jag-lovers.org [mailto:owner-x300@jag-lovers.org] On Behalf
Of Brian Ternamian
Sent: Monday, August 01, 2005 9:34 AM
To: x300@jag-lovers.org
Subject: Subject: Subject: Re: [x300] How to solve NO CONT problem!!Solved??
Folks, obviously, I am behind the info curve. And the questions seem to have
been answered. As Roseanne Roseanna Danna had to finally say - “Never Mind”.
The repair to the stock radio is holding up.
No more " NO CONT " message now. The Cd’s keep playing all day.
So the radio goes back in the car today.
It seems that the pad that was forgotten in the soldering phase by Alpine
is the culprit.
Jos Raven
1995 X300
going to Scotland next Monday on a ten day trip.>there is definitely one smd resistor that I found not to be soldered on
one side.
This morning I placed the cassette hardware back in the radio and the NOT CONT
appeared again. I removed the cassette player again and CD playback came
back again.
After some prodding with a plastic trim tool I could locate the region
around the left rear corner again. Soldering some more smd components
brought a surprise!!
A resistor moved while soldering one side, this should not be possible if
both sides
are solder firmly. I took the resistor off and indeed, no solder on the
other pad. None at all!!
It is the resistor just on the right corner of the heat sink, marked 223
(22kOhm). The lower pad was not soldered. A square wave signal (part of
the handshake) is carried here.
I hope that this is the end of the problem now.
I’ll keep you all posted.
Thanks, this problem was nagging me a very long time.
Now people can take their radio to a good repair shop and tell them what to
do if one does not want to solder themselves.
Jos
At 15:42 5-8-2005 +0200, you wrote:>In reply to a message from Jos Raven sent Fri 5 Aug 2005:
Jos:
While you were at it, did you change the bulbs that illuminate the
buttons?
By the way, good job on this common problem.
Doug
The original message included these comments:
So the radio goes back in the car today.
It seems that the pad that was forgotten in the soldering phase by Alpine
In reply to a message from Jos Raven sent Fri 5 Aug 2005:
Kudos to Mr. Raven! After following his instructions, I now have
continuous CD capability. Before, when I would press the CD button,
I would get nothing 80% of the time, and NOT CONT the other 20. A
common problem solved! And boy, is that a little resistor! I didn’t
have the guts to replace the burned out bulbs, though- I am not
sure what kind to get. If anyone has detailed info on them, I might
give it a shot. And while I am at it, the bulbs in the clock quit,
and don’t know what to use there either. I did put the cardboard
in, so at least it works, now.
Again, Thanks to Jos!–
The original message included these comments:
No more ‘’ NO CONT ‘’ message now. The Cd’s keep playing all day.
So the radio goes back in the car today.
In reply to a message from JHurd sent Tue 16 Aug 2005:
This is an excellent thread, very useful. My question is how do
you remove the radio? Thanks.–
Anthony Hladun
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
In reply to a message from Anthony Hladun sent Wed 17 Aug 2005:
Check the X300 book on the Jag-Lovers web site for ski slope
removal. Once completed, radio removal should be obvious.–
The original message included these comments:
This is an excellent thread, very useful. My question is how do
you remove the radio? Thanks.
In reply to a message from Jos Raven sent Mon 1 Aug 2005:
Jos and rest of Forum,
Just thought I’d post to say thanks for the discussion. Just
bought an Alpine CD changer and installed it and got the
intermittent ‘‘NOT CONT’’ message. I was about to send the changer
unit back (which would have cost me money when they tested and
found out it was OK) whan I thought I’d just check this site.
Took the radio out, took it along with the photo from Jos, to some
friends at work who work in the electronics lab and later that
afternoon, a working radio and changer unit. They also confirmed
this threads suspicion of the ‘‘223’’ resitor having one unsoldered
pad.
Given the spread of the posts on here, this duff batch of radios
must have been a very large batch!!!
Good work guys.
Craig–
The original message included these comments:
See here which one; http://tinyurl.com/dcvy9
All the other components in that region are all in the control/handshake
circuit.
If this is THE final solution is too soon to say, but my Stock Radio works
fine now.
If this is a common fault made by the soldering machine programmer, quit a
mouth
full, then all radios from a production batch could have that fault.
A bad contact that sooner or later will fail.
I’ll keep you posted about the developments.
Jos Raven
In reply to a message from Jos Raven sent Mon 1 Aug 2005:
dear genius, I got an alpine changer this morning by post, off
ebay,it worked instantly and I drove straight to work.when I went
home I got not cont for a while, and now, nothing.i have read the
archives and the resistor in the radio seems to be the problem,can
you please confirm thi is defineately so,also how do I remove the
radio. cheers, wag–
The original message included these comments:
If this is THE final solution is too soon to say, but my Stock Radio works
In reply to a message from patwag sent Tue 9 May 2006:
Ok - so you have hit the problem most of us seem to have faced, so
in essence it’s not a problem.
Jos Raven, bless him, as I am sure you already know has the pics of
what to do, and the online book has details of the ski slope
removal. 20 minute job even for a novice Just look at the pictures,
absorb the advice and you WON’T go wrong.
The last one I had in with this problem, turned out to be a dry
joint on the capacitor near the resistor on Jos Ravens piccy. so
have a good look around in there. It’s tight though I have to
totally dismantle the thing but I am a bit too picky (to do this
for a living anyway)