Hi Forum,
Inmiddels is onderstaand probleempje opgelost - dankzij de suggesties van dit en het Parrot forum. Voor de volledigheid hier een kopie van de conclusie zoals ik die op het Parrot forum heb gepost.
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Following up from my earlier posting on this issue, things have cleared and it all works as it should. Thanks to all who contibuted. Below my conclusions, which hopefully help others as well!!
Essentially, the problem (Parrot sound not audible via car radio) was caused by an error in the original Porsche CR22/CDR22 (Becker) car radio manual. The correct pinning for the telephone line input is:
[picture of 20 pin mini ISO connector]
Radio Tel + Tel -
CDR 21 Pin 1 Pin 2
CDR 22 Pin 13 Pin 14
CDR 23 Pin 7 Pin 12
CDR 24 Pin 7 Pin 12
(information received from Parrot and also suggested on Parrot Forum – Thanks!!)
So, do not use pins 12/13 as suggested in the manual for telephone line input on this radio – it does not work.
Here’s a description in case you would like to know everything I did to get the Parrot CK3100 car kit to work perfectly.
Car: Porsche Boxster 2000
Radio: CR22 (Becker) with external loudspeaker amplifier
NOTE: Do not proceed if you do not have the ‘code’ for the radio
I also recommend you obtain the two special tools to remove the radio from the dash.
As this Boxster uses an external audio amplifier, the Parrot CK3100 interfaces to the radio using the radio’s mute- and telephone line-inputs. When the Parrot CK3100 is active, the mute line forces the radio to mute the current radio sound and switch to the telephone line inputs while displaying ‘PHONE’ on the display: you will hear the telephone sound via a car speaker.
Refer to the wiring diagram in the Parrot CK3100 manual.
CK3100 Power Cable
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The CK3100 power cable (with the fuses and the grey connectors) is used as is. E.g. remove the car power connector (ISO-A, the outer one) from the radio, insert the CK3100 power cable in between.
I had to revert the fuses (orange and red cables) so as to ensure that ‘+12 battery’ and ‘+12v ignition’ carry the correct signal. This is needed to the Parrot CK3100 to function correctly.
The ‘Mute In 3’ labelled connector is connected to ISO pin 3, which is the one we need in this case to properly mute the radio.
Parrot CK3100 Loudspeaker Cable
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The Parrot CK3100 loudspeaker cable (with the relay box and the black connectors) can be used as is as well. There is no need to use the black connectors in this case. Connect the yellow mute wire to the “Mute In 3” mentioned above. Connect the thin green/brown wires (telephone line out) to the corresponding +/- inputs on ISO C connecter pins 13/14, see above. Likely, you do not have a suitable ISO-C connector. Solve this by fixing two of the smaller type Faston connectors to the wires and carefully push these directly onto pins 13/14 of the radio. If you want to add some isolation (and profi looks), use a bit of this 'hot shrinking isolation' stuff - no clue how this is called in proper English, in Dutch it's called 'krimpkous')
Option: you can reduce the wire-mess behind the radio by removing the relay box all together; there is no need for it since this radio uses an external amplifier. The yellow mute wire coming out of the black box carries the same signal as the thin blue wire going into the box. Admitted, the box has two transistors in the path between them, so you might think it is needed for a correct mute signal. In fact, it is not. The transistors are used to drive the relays. Cut the multi-cable from the Parrot CK3100 to the black box close to the black box. Isolate (!) the unused yellow (+), black (-), white (Parrot CK3100 speaker 1), red (Parrot CK3100 speaker 2) wires, connect a suitable Faston connector on the blue wire that matches the “Mute In 3” Faston connector, connect it to the “Mute In 3”. NOTE: this probably violates Parrot’s warranty requirement, so you are on your own, I cannot guarantee there are no unwanted side effects, etc., etc.
Finally, you have to tell the radio what to do in case it received the mute signal. Refer to the car radio manual. Switch on the radio, enter the code (since you have disconnected the +12v previously). Check that it works normally. Press the ‘arrow down’ key for 8 seconds to enter the user menu. Turn the right dial to get to the ‘Phone’ option, use < and > to set it to “PH ON”. Next turn the dial until you reach the ‘Driver’ option. Use < and > to set it to “DRV L” or “DRV R” (selects if the left or the right speaker gets the telephone sound), dial to “END”. Wait until the normal display reappears,
Putting the radio back in the dash is a real pain unless you remove the heater control module above it. This control panel has a longer cable attached to it, so you can move it aside while rearranging the radio and its wires.
You should now be ready to continue with the setting up the Parrot CK3100.
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