Blauplunkt CD 413 car radio - UK Vintage Radio Repair and Restoration Discussion Forum

Jimmgrover · 26th Dec 2019, 11:40 pm

Cannot tune stations, radio works on one station and then fades away. Aerial tested ok by substitution. Checked circuit board for damage but have not got diagram.
Anybody got any ideas, thanks

'LIVEWIRE?' · 28th Dec 2019, 7:54 pm

I'm not sure if this is of any help, but (almost) all digitally tuned radios need two power supplies, one usually switched via the accessory position, the other a permanent +12v line. Failure of the latter will result in similar symptoms to those you describe, so the first thing I'd check is whether both supplies were present at the input to the stereo. This is easy with a voltmeter (analogue or digital) connected between chassis and each supply line. Also check the in-line fuse, which is mounted in the back of the stereo, usually just above the connectors.

26th Dec 2019, 11:40 pm	#1
Jimmgrover Retired Dormant Member Join Date: Dec 2019 Location: Swanley, Kent, UK. Posts: 1	Blauplunkt CD 413 car radio Cannot tune stations, radio works on one station and then fades away. Aerial tested ok by substitution. Checked circuit board for damage but have not got diagram. Anybody got any ideas, thanks

28th Dec 2019, 7:54 pm	#2
'LIVEWIRE?' Rest in Peace Join Date: Mar 2006 Location: N.W. Oxfordshire(Chipping Norton) Posts: 7,306	Re: Blauplunkt CD 413 car radio I'm not sure if this is of any help, but (almost) all digitally tuned radios need two power supplies, one usually switched via the accessory position, the other a permanent +12v line. Failure of the latter will result in similar symptoms to those you describe, so the first thing I'd check is whether both supplies were present at the input to the stereo. This is easy with a voltmeter (analogue or digital) connected between chassis and each supply line. Also check the in-line fuse, which is mounted in the back of the stereo, usually just above the connectors.