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denon udra-77

 
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Rico UK
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PostPosted: Wed Nov 12, 2008 6:59 pm    Post subject: denon udra-77 Reply with quote
Hello, I have a lovely old denon dr77 which for no reason has stopped outputting any sound , all else seems to work. I have noticed the relay does not click any more. Any ideas or access to a service manual would be very helpful thanks

Rico
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z3ratul



Joined: 03 Jul 2008
Posts: 14
PostPosted: Fri Nov 14, 2008 9:11 am    Post subject: Re: denon udra-77 Reply with quote
Rico UK wrote:
Hello, I have a lovely old denon dr77 which for no reason has stopped outputting any sound , all else seems to work. I have noticed the relay does not click any more. Any ideas or access to a service manual would be very helpful thanks

Rico


the only thing u can do 2 this is to try to format the device ....
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rico2_uk
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PostPosted: Wed Nov 26, 2008 4:34 pm    Post subject: Re: denon udra-77 Reply with quote
Hi
In case anyone else has this problem with other similar mini systems from Denon, I fixed the problem by replacing a faulty transistor (dtc114es) located near the speaker isolating relay The fault was identified by using a very old avo in circuit transistor tester

No idea why this transistor would fail - but there you go!

Still trying to find a service manual tho' so any input would be appreciated

Rico Very Happy
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