Dashboard illumination (PWM or voltage?)

A

Alex (YMG) 21 years ago

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Hi,

Could anyone tell me if Volvo Trucks use PWM instead of voltage regulation to control the dimming of the dashboard illumination?

My reason for asking is that I have a radio unit (Volvo VR200) fitted to my

240. Supplying varying voltage to the 'illumination terminal' of the radio results in odd behaviour which leads me to believe the radio may use PWM dimming?

Thanks

Alex

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