I've just sold a Cambridge 540R AV amplifier on ebay, and the buyer has
reported a fault - the sub and centre channels don't work. I only ever
used it as a stereo amp, and never had any problem with it. In his words:
---
The connection is from the DVD player – Optical lead and also coaxial
out. Both and either have been tried / and fail to produce any output
whatsoever on centre and sub. The menu provides for both to be set as on
or off and of course I have checked they are set as on and they are
still not working.
---
I'm not especially bothered - we've agreed a compromise on the price -
but this seems rather odd to me. Can anyone think of an explanation
beyond broken amplifier for the fault?

Thanks, Rob

On Wed, 28 Jan 2009 20:36:05 GMT, Rob
wrote:

I've just sold a Cambridge 540R AV amplifier on ebay, and the buyer has
reported a fault - the sub and centre channels don't work. I only ever
used it as a stereo amp, and never had any problem with it. In his words:
---
The connection is from the DVD player – Optical lead and also coaxial
out. Both and either have been tried / and fail to produce any output
whatsoever on centre and sub. The menu provides for both to be set as on
or off and of course I have checked they are set as on and they are
still not working.
---
I'm not especially bothered - we've agreed a compromise on the price -
but this seems rather odd to me. Can anyone think of an explanation
beyond broken amplifier for the fault?

Thanks, Rob

Occam's razor tells you to look no further. On the other hand, I don't
know how long you have had this (maybe you have forgotten), but could
there be some obscure submenu that let you switch off the speakers you
weren't using?

d

Don Pearce wrote:
On Wed, 28 Jan 2009 20:36:05 GMT, Rob
wrote:

I've just sold a Cambridge 540R AV amplifier on ebay, and the buyer has
reported a fault - the sub and centre channels don't work. I only ever
used it as a stereo amp, and never had any problem with it. In his words:
---
The connection is from the DVD player – Optical lead and also coaxial
out. Both and either have been tried / and fail to produce any output
whatsoever on centre and sub. The menu provides for both to be set as on
or off and of course I have checked they are set as on and they are
still not working.
---
I'm not especially bothered - we've agreed a compromise on the price -
but this seems rather odd to me. Can anyone think of an explanation
beyond broken amplifier for the fault?

Thanks, Rob

Occam's razor tells you to look no further. On the other hand, I don't
know how long you have had this (maybe you have forgotten), but could
there be some obscure submenu that let you switch off the speakers you
weren't using?


The menus look like something from an 80s computer screen, and made
little sense to me - especially since I didn't need any of the AV
functions. I've looked in the manual and the only other thing I could
think to try was a factory reset - which he's done.

Best to just let it go, things break.

Rob

On Wed, 28 Jan 2009 20:48:22 GMT, Rob
wrote:

Don Pearce wrote:
On Wed, 28 Jan 2009 20:36:05 GMT, Rob
wrote:

I've just sold a Cambridge 540R AV amplifier on ebay, and the buyer has
reported a fault - the sub and centre channels don't work. I only ever
used it as a stereo amp, and never had any problem with it. In his words:
---
The connection is from the DVD player – Optical lead and also coaxial
out. Both and either have been tried / and fail to produce any output
whatsoever on centre and sub. The menu provides for both to be set as on
or off and of course I have checked they are set as on and they are
still not working.
---
I'm not especially bothered - we've agreed a compromise on the price -
but this seems rather odd to me. Can anyone think of an explanation
beyond broken amplifier for the fault?

Thanks, Rob

Occam's razor tells you to look no further. On the other hand, I don't
know how long you have had this (maybe you have forgotten), but could
there be some obscure submenu that let you switch off the speakers you
weren't using?


The menus look like something from an 80s computer screen, and made
little sense to me - especially since I didn't need any of the AV
functions. I've looked in the manual and the only other thing I could
think to try was a factory reset - which he's done.

Best to just let it go, things break.

Rob


If a factory reset (poke a paper clip in a hole on the back, if memory
serves) does nothing, then yes, it is probably broken.

d

"Rob" wrote in message
om...
I've just sold a Cambridge 540R AV amplifier on ebay, and the buyer has
reported a fault - the sub and centre channels don't work. I only ever
used it as a stereo amp, and never had any problem with it. In his words:
---
The connection is from the DVD player – Optical lead and also coaxial out.
Both and either have been tried / and fail to produce any output
whatsoever on centre and sub. The menu provides for both to be set as on
or off and of course I have checked they are set as on and they are still
not working.
---
I'm not especially bothered - we've agreed a compromise on the price - but
this seems rather odd to me. Can anyone think of an explanation beyond
broken amplifier for the fault?

Thanks, Rob

A bit of a long shot, but what discs has he tried playing? If the front
speakers are set to "full range" and there is only a two-channel stereo
track on the DVD then there won't be any output from the centre or sub.

David.

Rob wrote:
I've just sold a Cambridge 540R AV amplifier on ebay, and the buyer has
reported a fault - the sub and centre channels don't work. I only ever
used it as a stereo amp, and never had any problem with it. In his words:
---
The connection is from the DVD player – Optical lead and also coaxial
out. Both and either have been tried / and fail to produce any output
whatsoever on centre and sub. The menu provides for both to be set as on
or off and of course I have checked they are set as on and they are
still not working.
---
I'm not especially bothered - we've agreed a compromise on the price -
but this seems rather odd to me. Can anyone think of an explanation
beyond broken amplifier for the fault?

My old Yamaha AV amp needed to have the "effect" mode switched on before
it would output to anything other than the two front channels. The
DD/DTS logo would light up regardless of whether or not "effect" was on.

Either that or he's not using a 5.1 source.