Work on these all the time possible loose ground screws on input jack assy or
broken ground connection
in same area. Also bad sorder connections on sram chip near main processor {very
small connections
must be very good at soldering!!

Steve
N.J.

Bernhard wrote:

Daniel,
Thanks for your suggestions.
I know what a service manual contains and I'm experienced enough to
not trying to repair my receiver to death. I mentioned to buy the
service manual because the device is filled up with so much boards
that it was difficult to tell their exact function (and after some
years I usually need the manual for some other repairs).

Another point is the qualification of service personnel in repair shops
here in Germany. Almost all of them work on a "pay-per-module" base:
Let's first exchange the module or PCB that makes up the control panel
with the power switch (ups.. thats about $100.-) next let's try the
power supply (another $130.-) and so on. The price for a repair cost
estimate is around $50.- if you don't actually let the device be
repaired in that shop. And my personal experience is that most repair
cases have been really small things like a burned diode or a dead
electrolytic capacitor and could be fixed for a buck or so (not taking
into account the time I need to locate the error, but I don't have to
pay for it).

I think, Dan and you are right with your guess and I will try to find
the faulty solder joint.

Bernhard (backs*mailandnews.com)

Sofie wrote:

snipped:
"Bernhard" wrote in message
My Yamaha RX-V795 receiver shows a strange behaviour.
After switching the device on, it shuts down immediately
or after some seconds or after a longer period of time,
sometimes after 1 or 2 hours.

This often happens when I inadvertently bump against the
rack on which the receiver is located - but it also happens
when absolutely no mechanical vibrations are present.
Bernhard
---------------------------------------------

Bernhard:
Regarding the symptoms you described, "buying the service manual and
disassembling the unit" is not going to fix the problem nor will the service
manual offer you specific suggestions and procedures for repair.... the
service manual is only most useful to knowledgeable and experienced
technicians who probably can fix the equipment without the manual..
What you described is most likely, as the previous reply post by "Dan"
correctly stated, caused by faulty solder connections and/or possibly
intermittent connectors. This is a routine repair at most service shops
that most likely does NOT require the hard to get and expensive service
manual.
As "Dan" suggested, at the very least take it to a service shop for a repair
cost estimate..... so you can make an intelligent repair decision with facts
instead of guesses. If you take it to the shop AFTER aborted or failed
home repair attempts, or after continuing to operate the unit with this
problem until it gets worse to the point it won't work at all, the repair
shop price will certainly be much higher.
--
Best Regards,
Daniel Sofie
Electronics Supply & Repair
-----------------------------