Hi,

Do new (year 2005) car radios have a service mode for some basic
configuration?

I posted a question here some weeks ago about reconfiguring a car radio in a
US made car (US FM band standard) to the European FM band (with narrower
channel selection).

I have dismantled the radio and checked which components were in the tuner.
It is a Philips TEA6848H, (data he
http://www.kuntigi.net/download/Phil...io-circuit.pdf

This circuit is capable of tuning both US and European FM bands and I'm just
curious if car radios nowadays have some kind of 'service-mode' which enable
simple programming of parameters like regional radio standards and channel
spacing etc..

If any of you have heard of something like that, I would appreciate
information on how to invoke service mode and which parameters are
programmable. The radio in question came in a new Dodge truck. The radio
model label plate and tuner images can be founde he
http://www.kuntigi.net/download/car-radio.html

Thanks for *any' information which might be helpful in having this box
correctly tune the narrow European FM channels.

regards

Geir

Hi!

Do new (year 2005) car radios have a service mode for some basic
configuration?

Maybe, I don't know.

However, it looks like the TEA6848H is externally programmed at each
power-up. Whatever defines the allowed tuning range and tuning "steps" is
probably hardcoded in an external firmware IC. Such an IC might be
programmed as the radios run down the line.

You might ask a Chrysler dealer if they have the ability to reprogram the
radio... I think most GM dealers can do at least minimal reprogramming of
their radios. Chrysler may have a similar program.

William