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Problem with Denon DRA-345R Receiver

 
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FranciscoB



Joined: 03 May 2011
Posts: 3

PostPosted: Tue May 03, 2011 11:00 am    Post subject: Problem with Denon DRA-345R Receiver Reply with quote

Just found this one on the garbage yesterday : )

Well, as soon as I turned it on, I noticed a burning smell so opened it up and noticed the 2 resistors "cooking".

I would like to ask you if you think this might be solve by direct replacemente?

Also, anyone has a service manual / user's manual in english they could share in pdf?




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Best regards,
Francisco


Last edited by FranciscoB on Tue May 03, 2011 11:04 am; edited 1 time in total
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FranciscoB



Joined: 03 May 2011
Posts: 3

PostPosted: Tue May 03, 2011 11:02 am    Post subject: Reply with quote

I checked the surrounding transistors and, since I don't have much experience, I've been reading around and retained that:

b-e should conduct in one way only;
b-c should conduct in one way only;
c-e shouldn't conduct either way.

I measured the transistors (still on the board) around the faulty resistors and most of them measure faulty.

If they are indeed faulty, what might have caused it? what shoudl I check next?
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Francisco
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jts1957



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

PostPosted: Wed May 04, 2011 1:17 am    Post subject: Reply with quote

http://elektrotanya.com/denon_dra-345r.pdf/download.html

Be sure to re-check "out of circuit" as low value resistors, etc. can also affect reading while "in circuit."
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vtech



Joined: 08 May 2006
Posts: 1264
Location: USA

PostPosted: Wed May 04, 2011 2:21 am    Post subject: Reply with quote

Typical signs of water/fluid damage.
Very likely to be more problem that it's worthed.
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