Service mode with Car radios...?

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 here:

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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 here:

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

regards

Geir

Reply to
Geir Holmavatn
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Hi!

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

Reply to
William R. Walsh

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