Yamaha RX-730

[Smoky D]

Hello all.
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?

 

[avionic]

Without a service manual I can't assist you much.Pull the cover and check all the fuses. Are you getting any sound out of it?

 

[Smoky D]

Rx-730

HI,
I am waiting for the service manual.Thanks for the link from e-bay,
No sound at all.Nothing lights up at all except the red LED on the volume
knob.Relay clicks.and thats it.

 

[avionic]

Any tips on where
I should start my troubleshooting once the service manual arrives?

Always start at the power supply.Verify all supply voltages are working and getting to where there needed to be.
If you get time. Post a photo of the component side of the power supply.So we can have a visual look-see.:thmbsp:

 

[Smoky D]

Rx-730

Good morning,
Will post the pics u suggested probably today.

 

[Smoky D]

Rx-730

Okay,
Here is about the best pic I could get.Fuse is okay.

 

[avionic]

Don't see anything there that looks fouled up.Have to wait till a schematic is available.

 

[brutal]

I don't see any front panel lights other than the volume LED and the display.

I'd start by ensuring the lamp behind the display isn't burned out. It could be just fine...

 

[avionic]

HI,
I am waiting for the service manual.Thanks for the link from e-bay,
No sound at all.Nothing lights up at all except the red LED on the volume
knob.Relay clicks.and thats it.

Brutal has a good point. Does it make any sound when connected to speakers?

 

[Smoky D]

Yamaha Rx-730 Update

Good morning everyone,
Did a quick test of voltages this morning before I left the house for work.
As far as the LED front panel light no showing, I checked the connection
at the board and its getting the 12 vdc to the light.So, apparently the
light is burned out.Second, i havent tried speakers only the headphone
jack and get nothing.With the light burned out, you are guessing what you
are selecting from the input selector on the front of the panel.This evening
i will troubleshoot more.

 

[Smoky D]

Rx-730

Just arrived home.Checked the bulb for the display.It is burnt out.
Plugged in a cd player and nothing when using headphones.You can hear
faintly in the background that your trying to select a input.Made sure that
jumpers were not loose, and as I touched them I could hear a buzzing noise
in my headphones as I touched them.Proceeding on tonight.