Yamaha RX-730 power issues

Smoothjazz · 19th January 2012, 11:19 PM

Just got the Yamaha RX-730 in the mail today.It has issues, which I knew
before I got it.Just ordered the service manual.Here are the symptons.
You push power switch...hear the relay click.The only thing that lights up
is the red LED on the volume knob.No display lights at all.Any tips on where
I should start my troubleshooting once the service manual arrives?

Chris Hornbeck · 19th January 2012, 11:44 PM

Does it have a small keep-alive power transformer and separate main power transformer? If so check main xfrmr primary for open. These are internally thermal fused.

All good fortune,
Chris

Smoothjazz · 20th January 2012, 12:25 AM

Hi Chris,
Thanks for the reply.I am not sure what it has just yet.I am waiting to get a service
manual for it to start ts.The relay clicks,LED light for volume knob lights up..thats
it.

Smoothjazz

AtticusJ · 12th February 2012, 07:02 AM

Forgive me if this is a stupid suggestion. I bought a second hand RX-530 with the same issues, however it has no LED so I thought it was dead. A week later I decided to try hooking up speakers and after cycling though the inputs it played! There's a single bulb for the display which burned out. The relay is just the turn on delay.

Again, sounds stupid, but the same situation had me studying the amp and schematic for a week.

19th January 2012, 11:19 PM	#1
Smoothjazz diyAudio Member Join Date: Dec 2011	Yamaha RX-730 power issues Just got the Yamaha RX-730 in the mail today.It has issues, which I knew before I got it.Just ordered the service manual.Here are the symptons. You push power switch...hear the relay click.The only thing that lights up is the red LED on the volume knob.No display lights at all.Any tips on where I should start my troubleshooting once the service manual arrives?

20th January 2012, 12:25 AM	#3
Smoothjazz diyAudio Member Join Date: Dec 2011	Rx-730 Hi Chris, Thanks for the reply.I am not sure what it has just yet.I am waiting to get a service manual for it to start ts.The relay clicks,LED light for volume knob lights up..thats it. Smoothjazz

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19th January 2012, 11:44 PM	#2
Chris Hornbeck diyAudio Member Join Date: May 2011 Location: Little Rock	Does it have a small keep-alive power transformer and separate main power transformer? If so check main xfrmr primary for open. These are internally thermal fused. All good fortune, Chris

12th February 2012, 07:02 AM	#4
AtticusJ diyAudio Member Join Date: Jul 2010	Forgive me if this is a stupid suggestion. I bought a second hand RX-530 with the same issues, however it has no LED so I thought it was dead. A week later I decided to try hooking up speakers and after cycling though the inputs it played! There's a single bulb for the display which burned out. The relay is just the turn on delay. Again, sounds stupid, but the same situation had me studying the amp and schematic for a week.

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