Volvo RTI Instruções de Operação descarregar pdf (Página 21)

On the main board of the TV tuner there is an IC which is a Three Video Input, Three 2 channels Audio

Input and Two Output circuits. The IC are HA11508 an Audio-Video Switch from Hitachi. This IC we will

make some modification to and we will use the NAV and a small special made electronic we will make to

set the switches the way we want without using Melbus Protocol and some other sophisticated

programmable IC to communicate with it. This we will look into and publish as soon as we have solved it

so everybody have a chance to make this modification without any special programming tools.

The Pdf file with schema over HA11508 can be found at our web site for download:

www.nasab.com/Volvo/datasheet-HA11508.pdf

This IC will even be of interest for those who try to connect some Video, Back camera etc. You can with

some small electronic get it to serve your purpose. To get it to work another or your way you have to

make some electronic between Pin 6, 8 and 10. This pin is control and mute pins and Volvo has put these

to 0V. And we think they are operated from Melbus, but you can cut in the pc board the connection to

pin 6 and 8 easily and let those 2 control signal together with the signal from Melbus be connected with

some special electronic you make, by this you would have the opportunity to control this switch together

with Melbus for setting up back camera or video without depend on the Melbus. But you do have to

have knowledge of electronic and how to do it. But that we will take in another project.

We will also mention that this modification for the 4.3 inch RTI display to NAV can also be adapted for

the wider Volvo Display as the mechanical parts are the same in the RTI Display and you can use a wider

NAV, maybe with Video in, if so, maybe you should not take out the AF PC board from the Tuner, but

solder the new small connector directly on the PC board contact and use the other connector on the

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Volvo RTI Instruções de Operação Página 21