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Post by eltrasero on Jul 15, 2021 14:45:01 GMT
Looking for some technical assistance here. I have a Boss multi FX unit and when I plug my stereo headphones in, I only get sound in the right side. then, when I pull the 1/4 jackplug out slightly, the sound goes dead on the right side, but I can hear it in the left side. Has anyone experienced this before? I have tried it with two good sets of headphones and it is the same outcome. They are both TRS 1/4 in ch jacks.
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Post by Charlie Hall on Jul 15, 2021 17:30:37 GMT
It sounds as though the left channel output of the unit is not working. Pulling the jack out part way connects the tip of the headphone plug to the right output instead of the left output.
Regards,
Charlie
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Post by eltrasero on Jul 16, 2021 8:06:18 GMT
It's only the headphones socket that does this. The other ins and outs work exactly as they should. Can"t find much about this on the internet apart from one comment that Boss headphones out are unbalanced. What does that mean?
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Post by Charlie Hall on Jul 16, 2021 12:33:45 GMT
It's only the headphones socket that does this. The other ins and outs work exactly as they should. Can"t find much about this on the internet apart from one comment that Boss headphones out are unbalanced. What does that mean? That probably means the headphone output amp for the left channel has failed. You should ignore the unhelpful comment about unbalanced connections with headphones. Unbalanced simply means a standard 2 conductor output per channel with a signal and earth connection. Headphones are never balanced connections as far as I know. If they were, TRS jack connectors couldn't be used. Regards, Charlie |
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Post by eltrasero on Jul 20, 2021 11:44:37 GMT
Is this an easy thing to fix?
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Post by timryland on Jul 20, 2021 15:07:44 GMT
Which Boss multi-effect unit are you using. I’ve got a ME-50 which I can tryit on to see if it’s the same.
Tim.
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Post by Charlie Hall on Jul 20, 2021 17:11:12 GMT
Is this an easy thing to fix? I would doubt it, to be honest. Some part has probably failed. If you are really lucky it could be a bad or broken solder joint at the headphone socket but unless you feel able to dismantle the unit to have a look you might be better off having someone look at it for you. Regards, Charlie |
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Post by garystrat on Jul 20, 2021 17:35:29 GMT
You may find the connection is dependent on the spring tension of the socket connector on the plug contact points, I have found they can tend to become weaker with constant use around the pivot point. Sometimes just bending them in a bit provides a short term fix, but if this happens the socket normally needs replacing.
I suggest this as you say it happens when pulled out slightly, which would suggest it may not have a enough tension to return and make good contact?
Regards
Gary
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Post by eltrasero on Jul 21, 2021 9:06:05 GMT
It's a GT100. Everything else works fine. It's just the headphones socket, that I had never used before, that has this issue.
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Post by garystrat on Jul 21, 2021 9:25:32 GMT
I assume from what you say that it's working when the plug is fully in?
Regards
Gary
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Post by eltrasero on Jul 21, 2021 10:17:33 GMT
When the headphones jack is plugged fully in, you only get sound on the right side. When you pull the jack out slightly, you only get sound on the left side. You don't get sound through both sides of the headphones at any point. I was led to believe from elsewhere that this is a common fault with Boss multi fx. But it would seem it might not be the case and mine is just a dodgy one. What I was hoping was that others had experienced this and had come up with a fairly simple solution, like replacing the phones socket on the unit.
As I say, everything else works exactly as it should. It is no longer in warranty.
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Post by garystrat on Jul 21, 2021 11:11:06 GMT
This does sound very much like a socket fault as you can get left and right output, but not together. It may just be the the contact points are slightly out of alignment if it hasn't been used that much, it may also be worth rotating the plug slightly whilst in the socket in case anything is interfering with the connection.
What I think is happening is that as you insert the plug(s) the tip is first making contact with one channel then the other as it's inserted, this would indicate the actual channels are working.
Regards
Gary
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