Broke the sub preout on Pioneer SC-LX83

Hello all

So ive been demoing some Cusat cables for my CD player and in the middle of doing this decide to lift my sub off the floor on some bricks to see if it would tighten the bass up.  No sooner having done this I clipped one of the front bricks with my foot enough to knock it out and the sub to fall.  The sub doesnt recieve any signal from the AVR now and I feel like a clumsy idiot.

What Ive tried so far:  

Ive tried cables that I know have no problems and still no output.  

The speaker settings for the AVR were working before hand but I have tried different settings to look at all options such as PLUS and YES for subwoofer option and main speakers set to small with crossover at 200, nothing!  

I have tested the sub LFE input direct from the CD analoge output and it works fine. Ive also tested the AVR front left preout to the LFE input on the sub and that works fine.  Ive also tested the AVR sub preout to the line in on the sub and no signal.  So I think I can safely rule out that the problem is with the sub.

I think the problem lies directly with damage to the sub RCA preout.  The AVR is completely out of its warranty so its either a DIY fix or a send off to get repaired.  

Now before I go opening my amp up Im just looking for a bit of advice first, options lets say.

Ive thought of so far:

Opening it up - Resoldering the joints of the sub RCA, replacing the RCA output or both of these.  
Send the AVR off to get repaired - expensive considering its weight.
Try and speak to Pioneer to see if there is a servicable part that I can buy, I dont know if I can buy a preout board that can be just replaced and cutting down the cost that way.

Im trying to look for a serviceable/schematic manual for the amp before opening it up.

As my experience so far of this forum is that you lot seem to know what you talking about
please please please dont hold back with any words of wisdom.  The last thing I want to do is break the whole AVR.  Does anyone know of a more dedicatd Pioneer AVR forum that I can also post on? Theres an owners thread at AV forums so might try that as well

AVR is a Pioneer SC-LX83

Thanks Darren

EDIT: Just noticed I posted in the wrong section, if a Mod could move it to the right one that would be great.  Too many tabs open at once


Edited by UKMach - 01 Jun 2014 at 6:20pm

Hi Darren,
I see Dave's comments, sounds sensible to check those first.
The groups of phonos are usually a quite robust plastic moulding with cast in "wires". Can you actually see any physical damage? If you're confident enough then a look inside might reveal whether you can actually get to the innards to see. Some judicious work with small scredrivers etc might allow things to be bent straight.
But please remember to disconnect from the mains supply first!!

Irritating and disappointing for you Darren. Please post a picture of the sub out socket on the AVR.

Hmmm, looks rather daunting. I think I'd be inclined to agree with your conclusion. Even if you try yourself, ther's a real danger of having to get even more repaired.
How things change. Is it a computer or an amplifier?
Some of us might remember the quote "An ideal amplifier would be a wire with gain" from Peter Walker, I think, the Quad founder. Even he couldn't quite manage to make amplifiers that simple, but at least you could see and replace all the bits!