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CUC4400 intermittend no tuner signal

 
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gpslvr
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PostPosted: Mon Feb 12, 2007 10:59 pm    Post subject: CUC4400 intermittend no tuner signal Reply with quote

On my grundig P40-440 CUC4400, the tuner signal sometimes disapearjavascript:emoticon('Evil or Very Mad')
Evil or Very Mad. If it happens, than a VCR tuner on the scart will work ok (Besides,It always do). So it means, there is an antenna signal always available, but interupted in the TV. Any ideas where to look at . I do have the scematics found on this site. Question
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directtt
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PostPosted: Thu Apr 09, 2009 9:58 am    Post subject: Reply with quote

i have the same problem.i change tuner but the problem stills.
if i had service manual maybe i can do something but
i can find it
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gary



Joined: 05 Apr 2005
Posts: 584
Location: MANCHESTER, uk

PostPosted: Thu Apr 09, 2009 3:00 pm    Post subject: Reply with quote

resolder all the earth points inside the tuner
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jts1957



Joined: 24 Nov 2008
Posts: 2472
Location: Far, Far Away

PostPosted: Thu Apr 09, 2009 5:43 pm    Post subject: Reply with quote

See:

http://www.eserviceinfo.com/downloadsm/372/Grundig_CUC%204400.html
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directtt
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PostPosted: Sat Apr 11, 2009 10:01 pm    Post subject: Reply with quote

hello again from greece my friends
thanks for your help! tuner now is working fine and i have the shematics,
but a new problem now! when power on from main switch it doesn start always...
i notice that 9v input at regulator 7805 is 3.45v (cascades power?)
i also found R531 that has been damage....at least i have shematics!
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