Hi all,

I finally managed to fix the interior lights on my Passat at the weekend -
problem was the joins on some of the cables from the CCM had corroded
(inside the tape covering vw had put on, so problem wasn't immediately
visible). So thanks to everyone who pointed to where the problem had to be.

However, my radio problems (only receiving very strong signals, no power to
CD changer) remain.

I've got the head unit out (VW Gamma (Blaupunkt version)) - can anyone
confirm that the antenna amplifier is powered via the coax antenna cable?
Should I expect to see any significant voltage on the radio's antenna input
(I don't)? If not where is the antenna amp powered from? The pin outs for
the Gamma radio are shown he

http://www.siocommunications.co.uk/W...dio_Wiring.jpg

I have got 12v going out to the CD changer, so the problem there must be
with the adapter/cabling (it's a Sony CD changer), but it's a bit of a
co-incidence that both problems occurred at the same time.

cheers

KotF

"Kenny of the Fells" wrote in message
...
Hi all,

I finally managed to fix the interior lights on my Passat at the weekend -
problem was the joins on some of the cables from the CCM had corroded
(inside the tape covering vw had put on, so problem wasn't immediately
visible). So thanks to everyone who pointed to where the problem had to
be.

However, my radio problems (only receiving very strong signals, no power
to
CD changer) remain.

I've got the head unit out (VW Gamma (Blaupunkt version)) - can anyone
confirm that the antenna amplifier is powered via the coax antenna cable?
Should I expect to see any significant voltage on the radio's antenna
input
(I don't)? If not where is the antenna amp powered from? The pin outs for
the Gamma radio are shown he

http://www.siocommunications.co.uk/W...dio_Wiring.jpg

I have got 12v going out to the CD changer, so the problem there must be
with the adapter/cabling (it's a Sony CD changer), but it's a bit of a
co-incidence that both problems occurred at the same time.

cheers

KotF

If it's only receiving strong signals, then the most likely thing is that
the antenna is not powered. Yes, it does get a phantom supply on the co-ax.
If the radio is not supplying this then you can get an adapter from places
like Halfords which goes in the co-ax line, and you connect a source of 12v
to it.
Can't help on the CD player, but it sounds like an interface problem.

Brian wrote:

Should I expect to see any significant voltage on the
radio's antenna input (I don't)? If not where is the antenna amp
powered from? The pin outs for the Gamma radio are shown he

http://www.siocommunications.co.uk/W...dio_Wiring.jpg

I have got 12v going out to the CD changer, so the problem there
must be with the adapter/cabling (it's a Sony CD changer), but it's
a bit of a co-incidence that both problems occurred at the same time.

cheers

KotF

If it's only receiving strong signals, then the most likely thing is
that the antenna is not powered. Yes, it does get a phantom supply on
the co-ax. If the radio is not supplying this then you can get an
adapter from places like Halfords which goes in the co-ax line, and
you connect a source of 12v to it.
Can't help on the CD player, but it sounds like an interface problem.

Thanks. Do you know if there's a fuse for the antenna power anywhere? I
think I've traced the CD problem to a blown fuse inside the adapter, and
since both problems occurred at the same time I guess it could be the same
thing.

KotF

"Kenny of the Fells" wrote in message
...
Brian wrote:

Should I expect to see any significant voltage on the
radio's antenna input (I don't)? If not where is the antenna amp
powered from? The pin outs for the Gamma radio are shown he


http://www.siocommunications.co.uk/W...dio_Wiring.jpg

I have got 12v going out to the CD changer, so the problem there
must be with the adapter/cabling (it's a Sony CD changer), but it's
a bit of a co-incidence that both problems occurred at the same time.

cheers

KotF

If it's only receiving strong signals, then the most likely thing is
that the antenna is not powered. Yes, it does get a phantom supply on
the co-ax. If the radio is not supplying this then you can get an
adapter from places like Halfords which goes in the co-ax line, and
you connect a source of 12v to it.
Can't help on the CD player, but it sounds like an interface problem.

Thanks. Do you know if there's a fuse for the antenna power anywhere? I
think I've traced the CD problem to a blown fuse inside the adapter, and
since both problems occurred at the same time I guess it could be the same
thing.

KotF


I am not aware of a specific fuse for the antenna power supply. There is
normally only the one on the radio, and the normal ones supplying the radio.
There are two supplies to the radio, one permanent and one switched by the
ignition, both are fused.

Brian wrote:

If it's only receiving strong signals, then the most likely thing is
that the antenna is not powered. Yes, it does get a phantom supply on
the co-ax. If the radio is not supplying this then you can get an
adapter from places like Halfords which goes in the co-ax line, and
you connect a source of 12v to it.

OK, I borrowed one of these adapters and it made no difference, so I guess
that means the antenna amp is fried. So it looks like I need to replace the
antenna. Is it worth getting a better (longer) antenna and forgetting about
the amp, or is the cable run too long from the roof mount and so requires an
amp anyway? Any tips for getting at the antenna from below - Haynes seems to
advise against trying!

KotF

In article , lid
says...
Brian wrote:

If it's only receiving strong signals, then the most likely thing is
that the antenna is not powered. Yes, it does get a phantom supply on
the co-ax. If the radio is not supplying this then you can get an
adapter from places like Halfords which goes in the co-ax line, and
you connect a source of 12v to it.

OK, I borrowed one of these adapters and it made no difference, so I guess
that means the antenna amp is fried. So it looks like I need to replace the
antenna. Is it worth getting a better (longer) antenna and forgetting about
the amp, or is the cable run too long from the roof mount and so requires an
amp anyway? Any tips for getting at the antenna from below - Haynes seems to
advise against trying!

KotF


Original post has expired but is this a VAG car?
if so, the antenna amp is in the headunit, that is why you fit the
antenna booster with a 12v source when you change the headunit.