Ken123 wrote:
Hi...

I am having a problem with a Denon AVR-3300 receiver not switching
audio between sources. If I am on FM for example and switch to a DVD
or any other source, sound goes away. Sound stays dead if I switch
back to FM.
I've found if I wiggle one of the circuit boards, the sound comes
back. So I wish to remove that board and examine it. The pdf service
manual for a similar Denon receiver I downloaded shows almost the
identical arrangement of those boards, but does not explain how to
remove them.
They are connected to a main board with a type of connector I've not
encountered before, and they are very tight. Obviously I don't want
to start forcing anything. So I though someone on this group would be
able to assist me.

I have posted a close-up of a couple of these connectors.......

http://pages.suddenlink.net/ken/connectors.jpg

The main board is at the bottom of the picture.

PS: If anyone knows were I might pick up a service manual for this
model, please advise.

Typically one must at least partially remove the rear panel and carefully
unplug the board(s) by pulling them upward. There may be one or more small
tabs at the plugs to release the boards, but I don't really remember this
being the case.

Sometimes it helps to resolder the DSP chips to fix problems like this. All
it may take is a single bad solder connection on a Chip Enable, Clock, Data,
etc line to any one of those IC's to prevent sound, or for the sound not to
come back after changing sources, etc.

You can e-mail me for the manual. Reverse the domain name, so that
"labolgcbs" becomes "sbcglobal".



You'll need WinRar to re-assemble the manual; it will come in 4 meg chunks,
about 33 meg total.


Mark Z.