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Grinnders

Original Poster:

1,540 posts

91 months

[news] 
Monday 26th July 2010 quote quote all
Planning on upgrading my CDR24 with something that can do bluetooth and ipod.

Used the very helpful instructions on Planet9 to extract the unit and check the connections.

I have the (orange) fibre optic cables connected to the unit but when I remove them everything appears to carry on working.

I have no BOSE, SatNav, Phone, CD Changer or external amp so I am wondering what the fibre optic ring connects to and hence is there likely to be an issue if I just leave it detached.

I suspect MOST ('scuse the pun) leave this well alone but if there is anyone out there with some experience, please let me know.

Cheers

mankey

623 posts

90 months

[news] 
Monday 26th July 2010 quote quote all
Essentially (as you've worked-out already), you break the MOST loop when you unplug something like this. In your case you've discovered that nothing seems to be affected. If you still had the CDR24 unit in use you would discover the station and CD info wouldn't appear on the dash display as well as some other features, which may not matter to you.

No doubt you'll have something in place in future, even if it's not the CDR24, but you can use different connectors to loop back the fibre optic connection anyway. If you walk in to your OPC to ask for these connectors you'll probably get a blank look but they're available elsewhere, so you're better off waiting to see what you do in future. If you opt for one of the Dension units for instance, it should come with the connectors you need to cover all the combinations.

S1MMA

1,917 posts

106 months

[news] 
Monday 26th July 2010 quote quote all
I left mine unplugged and it didn't come up with any errors. Should be fine this way, as suggested you lose the radio station info etc... no biggie. Enjoy!

mankey

623 posts

90 months

[news] 
Monday 26th July 2010 quote quote all
S1MMA said:
I left mine unplugged and it didn't come up with any errors.....
That's right, just depends whether you use it for anything else.

Grinnders

Original Poster:

1,540 posts

91 months

[news] 
Monday 26th July 2010 quote quote all
I discovered that the radio info below the speedo was actually one of the 4 cables in the top block; i.e. not power and not speakers and not the fibre optic, so it probably depends on whether the new unit supports that same functionality
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mankey

623 posts

90 months

[news] 
Monday 26th July 2010 quote quote all
Grinnders said:
I discovered that the radio info below the speedo was actually one of the 4 cables in the top block; i.e. not power and not speakers and not the fibre optic, so it probably depends on whether the new unit supports that same functionality
You sure about that? I thought it was the fibre cable that carried the info signal from the CDR24.

If you switch to a different head unit I shouldn't think you're going to be able to display the output from the new one on the speedo display.

Sunnysidebb

1,341 posts

54 months

[news] 
Monday 26th July 2010 quote quote all
I took out the complete PCM and sent it away for repair. Took a month. All that time I had nothing connected in the dash for it. There were no problems at all. The On board computer still worked in the dash clocks.
2002/2003 996tt
Frank.

Tino

1,948 posts

170 months

[news] 
Monday 26th July 2010 quote quote all
I simply removed my CDR23 from my '03 996C4S, and added a Pioneer double din system.
I had BOSE and a CD Changer. Nothing was affected

Grinnders

Original Poster:

1,540 posts

91 months

[news] 
Tuesday 27th July 2010 quote quote all
Tino... you may be pre-fibre optic.

For the dash display of the radio station and whether it is MOST or not... well I'll find out real soon when my Kenwood unit turns up.
MOST is a "ring" concept http://www.mostcooperation.com/home/index.html where as ISO is more point-to-point.

The BOSE upgrade in my previous 997.1 had a MOST (fibre optic) interface and with non-BOSE (current Cayman S) I have regular ISO. This is why there are 4 different head units for a car. PCM2.1 BOSE, PCM2.1 nonBOSE, CDR24 BOSE, CDR24 nonBOSE. I cannot vouch for CDR30s.

Installation is probably this weekend so if anyone is interested I'll report back my findings.

mankey

623 posts

90 months

[news] 
Wednesday 28th July 2010 quote quote all
Yep, interested to hear how you get on.

What are you fitting instead?

Grinnders

Original Poster:

1,540 posts

91 months

Grinnders

Original Poster:

1,540 posts

91 months

[news] 
Saturday 31st July 2010 quote quote all
All went well.

I needed to bridge the cable on the CAN bus Pin 20 to the RED switched input of the head unit (thanks to Planet-9 articles) and then everything worked EXCEPT (as predicted) the info below the speedo which now just reads - - - -. Fibre optic pair just hanging loose and no dashboard errors.

check this thread for more info and pictures.
http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Edited by Grinnders on Saturday 31st July 23:20

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