"David Farber" wrote in message
...
This Yamaha HTR-5890 surround sound receiver had two shorted power
transistors and a blew the main 10 amp fuse. I replaced those but the
receiver still shuts down after a few seconds. The way the circuit
boards
are laid out it's not very convenient to troubleshoot with the unit
powered
up and it only stays powered up for a few seconds. I called Yamaha parts
and
they e-mailed me the service manual but the middle pages with the
schematic
are intentionally missing. For $18 I was told they would snail mail me
the
paper copy. But I need to fix the receiver for the weekend so any help
is
appreciated.

Thanks for your reply.
--
David Farber
David Farber's Service Center
L.A., CA



"Leonard Caillouet" wrote in message
news
Did Yamaha tell you that the schematics were intentionally removed? They
have always provided full schematics with their manuals in the past? Have
you called them about it?

Leonard


Leonard,

I initially called the Yamaha parts department and asked them to identify an
IC. The customer service agent was very helpful so I asked in passing if he
had a pdf of the service manual that he could e-mail. He obliged right away
and I received it in a few minutes. When I opened the document, the table of
contents showed a complete manual but the document ended right before the
electrical schematic. I called back and asked him to send the rest but he
said the only other thing he had to send was the parts listing which was the
last few pages of the manual. We then deduced that the only way to get the
schematic was to pay for the paper version of the service manual. Perhaps
the omission of the schematic from the pdf was not intentional but I don't
see any other explanation.

Thanks for your reply.
--
David Farber
David Farber's Service Center
L.A., CA