Preout issue

footwedge

I have a SC27 and the left preout output when using the b&k amp is muted to the point you have to put your ear close to the speaker to hear the sound. I had the amp checked and no issues were found. I even used the oppo 103 as a pre and the output was balanced. So the issue must be with the preout jack.

Is there a testing device that can check the integrity of this jack?

Any ideas on what could be causing this?

Just trying to learn something before I take it in for service.

[Deleted User]

You can use a simple volt-ohm meter (VOM) to measure AC voltage at the preamp's output. If you have some sort of single frequency test tone to play through both channels that would give you as idea of the level differences. If nothing else FM inter-station noise will work, or some setup DVDs will have test tones. Remember to keep the playing volume down when pure tones are being played.

tonyb

Only an old timer would remember using FM inter-station noise.

Take Ken's suggestion, but first ....and I hate to state the obvious, but did you check the speaker levels ? Wouldn't be the first time someone fell asleep with a remote in hand.....or a kid used the remote as a laser blaster.

You can also pop the top and see what you can see, if anything stands out. Loose wire at the jack, etc.

[Deleted User]

In the really olden times I used to suggest owners set their tape recorders to record mode with the left and right record levels set the same and then look at what the VU meters were showing.

footwedge

tonyb wrote: »

Only an old timer would remember using FM inter-station noise.

Take Ken's suggestion, but first ....and I hate to state the obvious, but did you check the speaker levels ? Wouldn't be the first time someone fell asleep with a remote in hand.....or a kid used the remote as a laser blaster.

You can also pop the top and see what you can see, if anything stands out. Loose wire at the jack, etc.

Not really a pop topper because I wouldn't know what I was looking for and would not be able to fix it. After adding the b&k I ran the mcacc several times but all of a sudden while playing cd's, the left channel would just drop not completely but enough to where you would have to get close to the speaker to hear it. Additionally, I sometimes lose my sub if the cable is bumped during vacuuming but with a wiggle of the cable at the sub preout jack it would come back. All of this leads me to believe this is a bad connection but I don't know how the preout section is built.

So I guess my question is: does this sound like an easy and inexpensive fix?

Nightfall

Are the RCA jacks mounted straight to the circuit board or to the chassis? I bet every RCA jack on the back could use a new solder joint.

tonyb

footwedge wrote: »

tonyb wrote: »

Only an old timer would remember using FM inter-station noise.

Take Ken's suggestion, but first ....and I hate to state the obvious, but did you check the speaker levels ? Wouldn't be the first time someone fell asleep with a remote in hand.....or a kid used the remote as a laser blaster.

You can also pop the top and see what you can see, if anything stands out. Loose wire at the jack, etc.

Not really a pop topper because I wouldn't know what I was looking for and would not be able to fix it. After adding the b&k I ran the mcacc several times but all of a sudden while playing cd's, the left channel would just drop not completely but enough to where you would have to get close to the speaker to hear it. Additionally, I sometimes lose my sub if the cable is bumped during vacuuming but with a wiggle of the cable at the sub preout jack it would come back. All of this leads me to believe this is a bad connection but I don't know how the preout section is built.

So I guess my question is: does this sound like an easy and inexpensive fix?

What cables are you using ? Have you tried swapping cables to make sure it's not the cable itself ?

Should not be an expensive fix if just the jacks have a bad solder or loose wire.

footwedge

Deleted post.

footwedge

I'm using the MIT T2 acquired from DSkip and yes I've swapped the cables. Also the problem is present in the right speaker when it's connected to the left speaker preout.