Beogram 4000 off and right arrow key not functioning, short

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beo3000 Posted: Tue, Jan 3 2017 9:20 PM

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I have Beogram 4000 that is mostly working but the off and right keys won't work, they were working but then a bolt dropped on the circuit board the small one with the reed relays on, and there was slight burnt smell and now all works except the off and right arrow keys, I am guessing a component has been burnt out but cannot find it do you have any idea what component it may be?

so far I think it may be an IC in the control panel 

any help would be much appreciated

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beo3000 replied on Tue, Jan 3 2017 10:10 PM

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any ideas ?

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Peter replied on Tue, Jan 3 2017 10:39 PM

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Have you got the service manual ? - this is a complex beast but the manual on site is a good one but you need to know what you are doing!!

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beo3000 replied on Tue, Jan 3 2017 11:40 PM

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Hi Peter, yes I have got the manual. it looks like it may be the 3IC7 which is an FCH 131, but thought perhaps someone else has had the same fault and know more about it 

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Dillen replied on Wed, Jan 4 2017 6:44 AM

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Check the power supply voltages BEFORE replacing parts.

Martin

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beo3000 replied on Wed, Jan 4 2017 11:14 AM

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Thanks Martin thats the next thing I will do